PATENT DOCUMENT

Publication Number: US-12089121-B2
Application Number: US-202217885807-A
Country: US
Kind Code: B2

Title: Easy location sharing

Abstract:
Systems and methods for sharing location information during a message conversation are provided. An electronic device displays a message region for displaying a message transcript of messages sent between a first participant and a second participant in a message conversation. The electronic device displays a location-sharing affordance. The electronic device detects a selection of the location-sharing affordance, where detecting a selection of the location-sharing affordance by the first participant comprises detecting a single contact by the first participant. In response to detecting a selection of the location-sharing affordance, the electronic device enables the second participant to obtain the first participant location information and displays a modified location-sharing affordance.

Claims:
What is claimed is: 
     
       1. An electronic device, comprising:
 a display; 
 one or more processors; 
 memory storing one or more programs configured to be executed by the one or more processors, the one or more programs including instructions for:
 displaying, via the display, a message region; 
 displaying, via the display, in the message region, messages sent between a first participant and a second participant in a message conversation; and 
 while displaying the message region:
 receiving a first location-sharing notification that first participant location information is being shared with the second participant for a predetermined location-sharing time period, wherein the predetermined location-sharing time period is scheduled to end at a first time, and wherein receiving the first location-sharing notification includes displaying, in the message region, the first location-sharing notification that the first participant location information is being shared with the second participant for the predetermined location-sharing time period; 
 sending a message to the first participant from the second participant, wherein the message includes alphanumeric characters; and 
 in response to sending the message to the first participant from the second participant and in accordance with a determination that a set of message sending criteria is met, receiving a second location-sharing notification that first participant location information is being shared with the second participant for an extended location-sharing time period, wherein the extended location-sharing time period is scheduled to end at a second time that is after the first time, and wherein receiving the second location-sharing notification includes displaying, in the message region, the second location-sharing notification that the first participant location information is being shared with the second participant for the extended location-sharing time period. 
 
 
 
     
     
       2. The electronic device of  claim 1 , the one or more programs further including instructions for:
 detecting interaction by the second participant with the message conversation during the extended location-sharing time period; and 
 in response to detecting interaction by the second participant with the message conversation during the extended location-sharing time period:
 sending a notification to the first participant; and 
 after sending the notification to the first participant, receiving a notification that extended location-sharing time period is further extended to end at a third time that is after the second time. 
 
 
     
     
       3. The electronic device of  claim 1 , the one or more programs further including instructions for:
 detecting interaction by the second participant with the message conversation after the extended location-sharing time period; and 
 in response to detecting interaction by the second participant with the message conversation after the extended location-sharing time period:
 forgoing sending a notification to the first participant. 
 
 
     
     
       4. The electronic device of  claim 2 , wherein detecting interaction by the second participant with the message conversation comprises detecting at least one criteria selected from the group consisting of:
 the first participant viewing at least a portion of the message conversation, 
 the second participant viewing at least a portion of the message conversation, 
 the first participant adding a message to the message conversation, and 
 the second participant adding a message to the message conversation. 
 
     
     
       5. The electronic device of  claim 1 , the one or more programs further including instructions for:
 displaying an indication in the message conversation that the location information of the first participant is being shared with the second participant. 
 
     
     
       6. The electronic device of  claim 5 , wherein the indication comprises a map-view. 
     
     
       7. The electronic device of  claim 6 , wherein the map-view is displayed behind an image of the first participant. 
     
     
       8. The electronic device of  claim 6 , wherein the map-view is displayed between two messages of the message conversation. 
     
     
       9. The electronic device of  claim 6 , the one or more programs further including instructions for:
 receiving updated first participant location information; and 
 updating the map-view with the updated first participant location information. 
 
     
     
       10. The electronic device of  claim 5 , wherein the indication comprises one or more of a location-sharing status, the first time, the second time, a current address of the first participant, a travel time between the first participant and the second participant, and a distance between the first participant and the second participant. 
     
     
       11. The electronic device of  claim 1 , the one or more programs further including instructions for:
 determining that the predetermined location-sharing time period has ended; and 
 in accordance with a determination that the predetermined location-sharing time period has ended:
 displaying an indication in the message conversation that the location information of the first participant is not being shared with the second participant. 
 
 
     
     
       12. The electronic device of  claim 1 , wherein the extended location-sharing time period is shorter than the predetermined location-sharing time period. 
     
     
       13. The electronic device of  claim 1 , the one or more programs further including instructions for:
 further in response to receiving the first location-sharing notification:
 sharing second participant location information with the first participant. 
 
 
     
     
       14. The electronic device of  claim 1 , the one or more programs further including instructions for:
 further in response to receiving the first location-sharing notification:
 displaying a request to share second participant location information with the first participant. 
 
 
     
     
       15. The electronic device of  claim 1 , wherein receiving the first location-sharing notification comprises receiving first participant location information from an external device. 
     
     
       16. The electronic device of  claim 1 , wherein receiving the first location-sharing notification comprises receiving the first participant location information from the electronic device of the first participant. 
     
     
       17. The electronic device of  claim 1 , wherein first participant location information comprises a location of the electronic device of the first participant. 
     
     
       18. A method comprising:
 at an electronic device comprising a display:
 displaying, via the display, a message region; 
 displaying, via the display, in the message region, messages sent between a first participant and a second participant in a message conversation; and 
 while displaying the message region:
 receiving a first location-sharing notification that first participant location information is being shared with the second participant for a predetermined location-sharing time period, wherein the predetermined location-sharing time period is scheduled to end at a first time, and wherein receiving the first location-sharing notification includes displaying, in the message region, the first location-sharing notification that the first participant location information is being shared with the second participant for the predetermined location-sharing time period; 
 sending a message to the first participant from the second participant, wherein the message includes alphanumeric characters; and 
 in response to sending the message to the first participant from the second participant and in accordance with a determination that a set of message sending criteria is met, receiving a second location-sharing notification that first participant location information is being shared with the second participant for an extended location-sharing time period, wherein the extended location-sharing time period is scheduled to end at a second time that is after the first time, and wherein receiving the second location-sharing notification includes displaying, in the message region, the second location-sharing notification that the first participant location information is being shared with the second participant for the extended location-sharing time period. 
 
 
 
     
     
       19. A non-transitory computer-readable storage medium comprising one or more programs configured to be executed by one or more processors of an electronic device with a display, the one or more programs including instructions for:
 displaying, via the display, a message region; 
 displaying, via the display, in the message region, messages sent between a first participant and a second participant in a message conversation; and 
 while displaying the message region:
 receiving a first location-sharing notification that first participant location information is being shared with the second participant for a predetermined location-sharing time period, wherein the predetermined location-sharing time period is scheduled to end at a first time, and wherein receiving the first location-sharing notification includes displaying, in the message region, the first location-sharing notification that the first participant location information is being shared with the second participant for the predetermined location-sharing time period; 
 sending a message to the first participant from the second participant, wherein the message includes alphanumeric characters; and 
 in response to sending the message to the first participant from the second participant and in accordance with a determination that a set of message sending criteria is met, receiving a second location-sharing notification that first participant location information is being shared with the second participant for an extended location-sharing time period, wherein the extended location-sharing time period is scheduled to end at a second time that is after the first time, and wherein receiving the second location-sharing notification includes displaying, in the message region, the second location-sharing notification that the first participant location information is being shared with the second participant for the extended location-sharing time period. 
 
 
     
     
       20. The electronic device of  claim 1 , wherein the set of message sending criteria includes a criterion that is met when the message is sent to the first participant from the second participant within a predetermined time threshold. 
     
     
       21. The method of  claim 18 , the method further comprising:
 detecting interaction by the second participant with the message conversation during the extended location-sharing time period; and 
 in response to detecting interaction by the second participant with the message conversation during the extended location-sharing time period:
 sending a notification to the first participant; and 
 after sending the notification to the first participant, receiving a notification that extended location-sharing time period is further extended to end at a third time that is after the second time. 
 
 
     
     
       22. The method of  claim 18 , the method further comprising:
 detecting interaction by the second participant with the message conversation after the extended location-sharing time period; and 
 in response to detecting interaction by the second participant with the message conversation after the extended location-sharing time period:
 forgoing sending a notification to the first participant. 
 
 
     
     
       23. The method of  claim 21 , wherein detecting interaction by the second participant with the message conversation comprises detecting at least one criteria selected from the group consisting of:
 the first participant viewing at least a portion of the message conversation, 
 the second participant viewing at least a portion of the message conversation, 
 the first participant adding a message to the message conversation, and 
 the second participant adding a message to the message conversation. 
 
     
     
       24. The method of  claim 18 , the method further comprising:
 displaying an indication in the message conversation that the location information of the first participant is being shared with the second participant. 
 
     
     
       25. The method of  claim 24 , wherein the indication comprises a map-view. 
     
     
       26. The method of  claim 25 , wherein the map-view is displayed behind an image of the first participant. 
     
     
       27. The method of  claim 25 , wherein the map-view is displayed between two messages of the message conversation. 
     
     
       28. The method of  claim 25 , the method further comprising:
 receiving updated first participant location information; and 
 updating the map-view with the updated first participant location information. 
 
     
     
       29. The method of  claim 24 , wherein the indication comprises one or more of a location-sharing status, the first time, the second time, a current address of the first participant, a travel time between the first participant and the second participant, and a distance between the first participant and the second participant. 
     
     
       30. The method of  claim 18 , the method further comprising:
 determining that the predetermined location-sharing time period has ended; and 
 in accordance with a determination that the predetermined location-sharing time period has ended:
 displaying an indication in the message conversation that the location information of the first participant is not being shared with the second participant. 
 
 
     
     
       31. The method of  claim 18 , wherein the extended location-sharing time period is shorter than the predetermined location-sharing time period. 
     
     
       32. The method of  claim 18 , the method further comprising:
 further in response to receiving the first location-sharing notification:
 sharing second participant location information with the first participant. 
 
 
     
     
       33. The method of  claim 18 , the method further comprising:
 further in response to receiving the first location-sharing notification:
 displaying a request to share second participant location information with the first participant. 
 
 
     
     
       34. The method of  claim 18 , wherein receiving the first location-sharing notification comprises receiving first participant location information from an external device. 
     
     
       35. The method of  claim 18 , wherein receiving the first location-sharing notification comprises receiving the first participant location information from the electronic device of the first participant. 
     
     
       36. The method of  claim 18 , wherein first participant location information comprises a location of the electronic device of the first participant. 
     
     
       37. The method of  claim 18 , wherein the set of message sending criteria includes a criterion that is met when the message is sent to the first participant from the second participant within a predetermined time threshold. 
     
     
       38. The non-transitory computer-readable storage medium of  claim 19 , the one or more programs further including instructions for:
 detecting interaction by the second participant with the message conversation during the extended location-sharing time period; and 
 in response to detecting interaction by the second participant with the message conversation during the extended location-sharing time period:
 sending a notification to the first participant; and 
 after sending the notification to the first participant, receiving a notification that extended location-sharing time period is further extended to end at a third time that is after the second time. 
 
 
     
     
       39. The non-transitory computer-readable storage medium of  claim 19 , the one or more programs further including instructions for:
 detecting interaction by the second participant with the message conversation after the extended location-sharing time period; and 
 in response to detecting interaction by the second participant with the message conversation after the extended location-sharing time period:
 forgoing sending a notification to the first participant. 
 
 
     
     
       40. The non-transitory computer-readable storage medium of  claim 38 , wherein detecting interaction by the second participant with the message conversation comprises detecting at least one criteria selected from the group consisting of:
 the first participant viewing at least a portion of the message conversation, 
 the second participant viewing at least a portion of the message conversation, 
 the first participant adding a message to the message conversation, and 
 the second participant adding a message to the message conversation. 
 
     
     
       41. The non-transitory computer-readable storage medium of  claim 19 , the one or more programs further including instructions for:
 displaying an indication in the message conversation that the location information of the first participant is being shared with the second participant. 
 
     
     
       42. The non-transitory computer-readable storage medium of  claim 41 , wherein the indication comprises a map-view. 
     
     
       43. The non-transitory computer-readable storage medium of  claim 42 , wherein the map-view is displayed behind an image of the first participant. 
     
     
       44. The non-transitory computer-readable storage medium of  claim 42 , wherein the map-view is displayed between two messages of the message conversation. 
     
     
       45. The non-transitory computer-readable storage medium of  claim 42 , the one or more programs further including instructions for:
 receiving updated first participant location information; and 
 updating the map-view with the updated first participant location information. 
 
     
     
       46. The non-transitory computer-readable storage medium of  claim 41 , wherein the indication comprises one or more of a location-sharing status, the first time, the second time, a current address of the first participant, a travel time between the first participant and the second participant, and a distance between the first participant and the second participant. 
     
     
       47. The non-transitory computer-readable storage medium of  claim 19 , the one or more programs further including instructions for:
 determining that the predetermined location-sharing time period has ended; and 
 in accordance with a determination that the predetermined location-sharing time period has ended:
 displaying an indication in the message conversation that the location information of the first participant is not being shared with the second participant. 
 
 
     
     
       48. The non-transitory computer-readable storage medium of  claim 19 , wherein the extended location-sharing time period is shorter than the predetermined location-sharing time period. 
     
     
       49. The non-transitory computer-readable storage medium of  claim 19 , the one or more programs further including instructions for:
 further in response to receiving the first location-sharing notification:
 sharing second participant location information with the first participant. 
 
 
     
     
       50. The non-transitory computer-readable storage medium of  claim 19 , the one or more programs further including instructions for:
 further in response to receiving the first location-sharing notification:
 displaying a request to share second participant location information with the first participant. 
 
 
     
     
       51. The non-transitory computer-readable storage medium of  claim 19 , wherein receiving the first location-sharing notification comprises receiving first participant location information from an external device. 
     
     
       52. The non-transitory computer-readable storage medium of  claim 19 , wherein receiving the first location-sharing notification comprises receiving the first participant location information from the electronic device of the first participant. 
     
     
       53. The non-transitory computer-readable storage medium of  claim 19 , wherein first participant location information comprises a location of the electronic device of the first participant. 
     
     
       54. The non-transitory computer-readable storage medium of  claim 19 , wherein the set of message sending criteria includes a criterion that is met when the message is sent to the first participant from the second participant within a predetermined time threshold.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 16/454,884, entitled “EASY LOCATION SHARING”, filed Jun. 27, 2019, which in turn is a continuation of U.S. patent application Ser. No. 15/985,570, now U.S. Pat. No. 10,341,826, entitled “EASY LOCATION SHARING”, filed May 21, 2018, which in turn is a continuation of U.S. patent application Ser. No. 15/876,673, now U.S. Pat. No. 9,998,888, entitled “EASY LOCATION SHARING”, filed Jan. 22, 2018, which in turn is a continuation of U.S. patent application Ser. No. 15/142,661, now U.S. Pat. No. 10,003,938, entitled “EASY LOCATION SHARING”, filed Apr. 29, 2016, which in turn claims priority to U.S. Provisional Application No. 62/205,562, entitled “EASY LOCATION SHARING”, filed Aug. 14, 2015. The contents of each of these applications are hereby incorporated by reference in their entireties. 
    
    
     FIELD 
     The present disclosure relate generally to user interfaces of electronic devices, and more specifically to techniques for sharing a user&#39;s location. 
     BACKGROUND 
     Text messaging is a common form of communication. Recently, text messaging has expanded to include additional functionality, including the ability to share location information between participants in a message conversation. Some methods for sharing location information can be, however, difficult and/or inefficient. 
     BRIEF SUMMARY 
     In some instances, many steps are required to share location, and these steps generally take the user away from the message transcript. In some instances, participants may want to share locations for a prolonged period of time. In such instances, the user repeats the steps to share location information each time a location update is desired, detracting from the user&#39;s messaging experience. Moreover, inefficiency, particularly on battery-powered mobile devices, may waste energy and increase the need for recharging. 
     Accordingly, there is a need for electronic devices with faster, more efficient methods and interfaces for sharing message participants&#39; location information. Such methods and interfaces optionally complement or replace other methods for sharing location information. Such methods and interfaces reduce the cognitive burden on a user and produce a more efficient human-machine interface. For battery-operated computing devices, such methods and interfaces conserve power and increase the time between battery charges. 
     In some embodiments, a method for sharing location information during a message conversation includes: at an electronic device comprising a touch-sensitive surface and a display: displaying, on the display, a message region; displaying, in the message region, messages sent between a first participant and a second participant in a message conversation; detecting a location-sharing request from the first participant to share first participant location information with the second participant; in response to detecting the location-sharing request from the first participant: enabling the second participant to obtain the first participant location information during a predetermined location-sharing time period, wherein the predetermined location-sharing time period is scheduled to end at a first time; detecting interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period; and in response to detecting interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period: extending the predetermined location-sharing time period to end at a second time that is after the first time. 
     In some embodiments, a method for sharing location information during a message conversation includes: at an electronic device comprising a touch-sensitive surface and a display: displaying, on the display, a message region; displaying, in the message region, messages sent between a first participant and a second participant in a message conversation; receiving a first location-sharing notification that first participant location information is being shared with the second participant for a predetermined location-sharing time period, wherein the predetermined location-sharing time period is scheduled to end at a first time; sending a message to the first participant; and receiving a second location-sharing notification that first participant location information is being shared with the second participant for an extended location-sharing time period, wherein the extended location-sharing time period is scheduled to end at a second time that is after the first time. 
     In some embodiments, a method for sharing location information during a message conversation includes: at an electronic device comprising a touch-sensitive surface and a display: displaying, on the display, a message region; displaying, at a first position in the message region, a bottom portion of a message transcript of messages sent between a first participant and a second participant; detecting contact on a location corresponding to the message transcript; detecting movement of the contact across the touch-sensitive surface and toward a top portion of the message region; and in response to detecting movement of the contact across the touch-sensitive surface and toward a top portion of the message region: displaying the bottom portion of the message transcript at a second position in the message region above the first position; and displaying a location-sharing affordance at the first position. 
     In some embodiments, a method for sharing location information during a message conversation includes: at an electronic device comprising a touch-sensitive surface and a display: displaying, on the display, a message region; displaying, in the message region, a message transcript of messages sent between a first participant and a second participant; displaying, at a first position in the message transcript, a shared-location affordance; while displaying the shared-location affordance at the first position, detecting a request to scroll the message transcript; in response to detecting the request to scroll the message transcript: determining whether the request to scroll the message transcript comprises a request to scroll the shared-location affordance beyond the message region; in accordance with a determination that the request to scroll the message transcript comprises a request to scroll the shared-location affordance beyond the message region: discontinuing display of the shared location in the message transcript; and displaying a location-sharing status bar outside the message region; and in accordance with a determination that the request to scroll the message transcript does not comprise a request to scroll the shared-location affordance beyond the message region: displaying the shared-location affordance at a second location in the message transcript. 
     In some embodiments, a method for sharing location information during a message conversation includes: at an electronic device comprising a touch-sensitive surface and a display: displaying, on the display, a message region; displaying, in the message region, a message transcript of messages sent between a first participant and a second participant; displaying a shared-location affordance in the message region, wherein the shared-location affordance is displayed below and adjacent to the message transcript, and wherein the shared-location affordance comprises a representation of a location of the first participant. 
     In some embodiments, a method for sharing location information during a message conversation includes: at an electronic device comprising a touch-sensitive surface and a display: displaying, on the display, a message region for displaying a message transcript of messages sent between a first participant and a second participant in a message conversation; displaying a location-sharing affordance; detecting a selection of the location-sharing affordance, wherein detecting a selection of the location-sharing affordance by the first participant consists of detecting a single contact by the first participant; and in response to detecting a selection of the location-sharing affordance: enabling the second participant to obtain the first participant location information; and displaying a modified location-sharing affordance. 
     In some embodiments, a non-transitory computer-readable storage medium has stored therein instructions which when executed by an electronic device with a display, causes the device to perform any of the methods described above. In some embodiments, an electronic device includes: a display and means for performing any of the methods described above. In accordance with some embodiments, an information processing apparatus, for use in an electronic device with a display, includes means for performing any of the methods described above. 
     In some embodiments, a multifunction device includes one or more processors; memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for: displaying a message region; displaying, in the message region, messages sent between a first participant and a second participant in a message conversation; detecting a location-sharing request from the first participant to share first participant location information with the second participant; in response to detecting the location-sharing request from the first participant: enabling the second participant to obtain the first participant location information during a predetermined location-sharing time period, wherein the predetermined location-sharing time period is scheduled to end at a first time; detecting interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period; and in response to detecting interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period: extending the predetermined location-sharing time period to end at a second time that is after the first time. 
     In some embodiments, a multifunction device includes one or more processors; memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for: displaying a message region; displaying, in the message region, messages sent between a first participant and a second participant in a message conversation; receiving a first location-sharing notification that first participant location information is being shared with the second participant for a predetermined location-sharing time period, wherein the predetermined location-sharing time period is scheduled to end at a first time; sending a message to the first participant; and receiving a second location-sharing notification that first participant location information is being shared with the second participant for an extended location-sharing time period, wherein the extended location-sharing time period is scheduled to end at a second time that is after the first time. 
     In some embodiments, a multifunction device includes one or more processors; memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for: displaying a message region; displaying, in the message region, messages sent between a first participant and a second participant in a message conversation; receiving a first location-sharing notification that first participant location information is being shared with the second participant for a predetermined location-sharing time period, wherein the predetermined location-sharing time period is scheduled to end at a first time; sending a message to the first participant; and receiving a second location-sharing notification that first participant location information is being shared with the second participant for an extended location-sharing time period, wherein the extended location-sharing time period is scheduled to end at a second time that is after the first time. 
     In some embodiments, a multifunction device includes one or more processors; memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for: displaying a message region; displaying, at a first position in the message region, a bottom portion of a message transcript of messages sent between a first participant and a second participant; detecting contact on a location corresponding to the message transcript; detecting movement of the contact across the touch-sensitive surface and toward a top portion of the message region; and in response to detecting movement of the contact across the touch-sensitive surface and toward a top portion of the message region: displaying the bottom portion of the message transcript at a second position in the message region above the first position; and displaying a location-sharing affordance at the first position. 
     In some embodiments, a multifunction device includes one or more processors; memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for: displaying a message region; displaying, in the message region, a message transcript of messages sent between a first participant and a second participant; displaying, at a first position in the message transcript, a shared-location affordance; while displaying the shared-location affordance at the first position, detecting a request to scroll the message transcript; in response to detecting the request to scroll the message transcript: determining whether the request to scroll the message transcript comprises a request to scroll the shared-location affordance beyond the message region; in accordance with a determination that the request to scroll the message transcript comprises a request to scroll the shared-location affordance beyond the message region: discontinuing display of the shared location in the message transcript; and displaying a location-sharing status bar outside the message region; and in accordance with a determination that the request to scroll the message transcript does not comprise a request to scroll the shared-location affordance beyond the message region: displaying the shared-location affordance at a second location in the message transcript. 
     In some embodiments, a multifunction device includes one or more processors; memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for: displaying, on the display, a message region for displaying a message transcript of messages sent between a first participant and a second participant in a message conversation; displaying a location-sharing affordance; detecting a selection of the location-sharing affordance, wherein detecting a selection of the location-sharing affordance by the first participant consists of detecting a single contact by the first participant; and in response to detecting a selection of the location-sharing affordance: enabling the second participant to obtain the first participant location information; and displaying a modified location-sharing affordance. 
     Thus, electronic devices are provided for easy location sharing in message conversation, thereby increasing the effectiveness, efficiency, and user satisfaction of such devices. The methods and interfaces provided may complement or replace conventional methods and interfaces for location sharing. 
    
    
     
       DESCRIPTION OF THE FIGURES 
       For a better understanding of the various described embodiments, reference should be made to the Description of Embodiments below, in conjunction with the following drawings in which like reference numerals refer to corresponding parts throughout the figures. 
         FIG.  1 A  is a block diagram illustrating a portable multifunction device with a touch-sensitive display in accordance with some embodiments. 
         FIG.  1 B  is a block diagram illustrating exemplary components for event handling in accordance with some embodiments. 
         FIG.  2    illustrates a portable multifunction device having a touch screen in accordance with some embodiments. 
         FIG.  3    is a block diagram of an exemplary multifunction device with a display and a touch-sensitive surface in accordance with some embodiments. 
         FIG.  4 A  illustrates an exemplary user interface for a menu of applications on a portable multifunction device in accordance with some embodiments. 
         FIG.  4 B  illustrates an exemplary user interface for a multifunction device with a touch-sensitive surface that is separate from the display in accordance with some embodiments. 
         FIG.  5 A  illustrates a personal electronic device in accordance with some embodiments. 
         FIG.  5 B  is a block diagram illustrating a personal electronic device in accordance with some embodiments. 
         FIG.  6 A  illustrates exemplary messaging user interfaces. 
         FIG.  6 B  illustrates exemplary messaging user interfaces. 
         FIG.  6 C  illustrates exemplary messaging user interfaces. 
         FIG.  6 D  illustrates exemplary messaging user interfaces. 
         FIG.  6 E  illustrates exemplary messaging user interfaces. 
         FIG.  6 F  illustrates exemplary messaging user interfaces. 
         FIG.  6 G  illustrates exemplary messaging user interfaces. 
         FIG.  6 H  illustrates exemplary messaging user interfaces. 
         FIG.  7 A  is a flow diagram illustrating a process for sharing location information. 
         FIG.  7 B  is a flow diagram illustrating a process for sharing location information. 
         FIG.  7 C  is a flow diagram illustrating a process for sharing location information. 
         FIG.  7 D  is a flow diagram illustrating a process for sharing location information. 
         FIG.  7 E  is a flow diagram illustrating a process for sharing location information. 
         FIG.  7 F  is a flow diagram illustrating a process for sharing location information. 
         FIG.  7 G  is a flow diagram illustrating a process for sharing location information. 
         FIG.  7 H  is a flow diagram illustrating a process for sharing location information. 
         FIG.  7 I  is a flow diagram illustrating a process for sharing location information. 
         FIG.  7 J  is a flow diagram illustrating a process for sharing location information. 
         FIG.  8 A  illustrates exemplary messaging user interfaces. 
         FIG.  8 B  illustrates exemplary messaging user interfaces. 
         FIG.  9    is a flow diagram illustrating a process for sharing location information. 
         FIG.  10    illustrates an exemplary functional block diagram of an electronic device configured for sharing location information. 
         FIG.  11 A  illustrates exemplary messaging user interfaces. 
         FIG.  11 B  illustrates exemplary messaging user interfaces. 
         FIG.  11 C  illustrates exemplary messaging user interfaces. 
         FIG.  11 D  illustrates exemplary messaging user interfaces. 
         FIG.  11 E  illustrates exemplary messaging user interfaces. 
         FIG.  11 F  illustrates exemplary messaging user interfaces. 
         FIG.  11 G  illustrates exemplary messaging user interfaces. 
         FIG.  12 A  is a flow diagram illustrating a process for sharing location information. 
         FIG.  12 B  is a flow diagram illustrating a process for sharing location information. 
         FIG.  12 C  is a flow diagram illustrating a process for sharing location information. 
         FIG.  12 D  is a flow diagram illustrating a process for sharing location information. 
         FIG.  12 E  is a flow diagram illustrating a process for sharing location information. 
         FIG.  12 F  is a flow diagram illustrating a process for sharing location information. 
         FIG.  12 G  is a flow diagram illustrating a process for sharing location information. 
         FIG.  12 H  is a flow diagram illustrating a process for sharing location information. 
         FIG.  13    illustrates an exemplary functional block diagram of an electronic device configured for sharing location information. 
         FIG.  14 A  illustrates exemplary messaging user interfaces. 
         FIG.  14 B  illustrates exemplary messaging user interfaces. 
         FIG.  14 C  illustrates exemplary messaging user interfaces. 
         FIG.  14 D  illustrates exemplary messaging user interfaces. 
         FIG.  14 E  illustrates exemplary messaging user interfaces. 
         FIG.  15 A  is a flow diagram illustrating a process for sharing location information. 
         FIG.  15 B  is a flow diagram illustrating a process for sharing location information. 
         FIG.  15 C  is a flow diagram illustrating a process for sharing location information. 
         FIG.  15 D  is a flow diagram illustrating a process for sharing location information. 
         FIG.  16    illustrates an exemplary functional block diagram of an electronic device configured for sharing location information. 
         FIG.  17 A  illustrates exemplary messaging user interfaces. 
         FIG.  17 B  illustrates exemplary messaging user interfaces. 
         FIG.  17 C  illustrates exemplary map user interfaces. 
         FIG.  17 D  illustrates exemplary map user interfaces. 
         FIG.  17 E  illustrates exemplary map user interfaces. 
         FIG.  18 A  is a flow diagram illustrating a process for sharing location information. 
         FIG.  18 B  is a flow diagram illustrating a process for sharing location information. 
         FIG.  18 C  is a flow diagram illustrating a process for sharing location information. 
         FIG.  18 D  is a flow diagram illustrating a process for sharing location information. 
         FIG.  18 E  is a flow diagram illustrating a process for sharing location information. 
         FIG.  19    illustrates an exemplary functional block diagram of an electronic device configured for sharing location information. 
         FIG.  20 A  is a flow diagram illustrating a process for sharing location information 
         FIG.  20 B  is a flow diagram illustrating a process for sharing location information 
         FIG.  20 C  is a flow diagram illustrating a process for sharing location information 
         FIG.  21    illustrates an exemplary functional block diagram of an electronic device configured for sharing location information. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The following description sets forth exemplary methods, parameters and the like. It should be recognized, however, that such description is not intended as a limitation on the scope of the present disclosure but is instead provided as a description of exemplary embodiments 
     There is a need for electronic devices with faster, more efficient methods and interfaces for sharing location information of participants in a message conversation. Such methods and interfaces reduce the cognitive burden on a user and produce a more efficient human-machine interface. For battery-operated devices, such methods and interfaces conserve power and increase the time between battery charges. 
     Below,  FIGS.  1 A- 1 B,  2 ,  3 ,  4 A- 4 B,  5 A- 5 B,  10 ,  13 ,  16 ,  19 , and  21    provide a description of exemplary devices for performing the techniques for sharing location information of participants in a message conversation.  FIGS.  6 A- 6 H,  8 A- 8 B,  11 A- 11 G,  14 A- 14 D, and  17 A- 17 C  illustrate exemplary user message and map user interfaces for sharing location information of participants in a message conversation.  FIGS.  7 A- 7 J,  9 ,  12 A- 12 H,  15 A- 15 D,  18 A- 18 E, and  20 A- 20 C  are flow diagrams illustrating methods of sharing location information of participants in a message conversation. 
     Although the following description uses terms “first,” “second,” etc. to describe various elements, these elements should not be limited by the terms. These terms are only used to distinguish one element from another. For example, a first touch could be termed a second touch, and, similarly, a second touch could be termed a first touch, without departing from the scope of the various described embodiments. The first touch and the second touch are both touches, but they are not the same touch. 
     The terminology used in the description of the various described embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various described embodiments and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term “and/or” as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. It will be further understood that the terms “includes,” “including,” “comprises,” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. 
     The term “if” is, optionally, construed to mean “when” or “upon” or “in response to determining” or “in response to detecting,” depending on the context. Similarly, the phrase “if it is determined” or “if [a stated condition or event] is detected” is, optionally, construed to mean “upon determining” or “in response to determining” or “upon detecting [the stated condition or event]” or “in response to detecting [the stated condition or event],” depending on the context. 
     Embodiments of electronic devices, user interfaces for such devices, and associated processes for using such devices are described. In some embodiments, the device is a portable communications device, such as a mobile telephone, that also contains other functions, such as PDA and/or music player functions. Exemplary embodiments of portable multifunction devices include, without limitation, the iPhone®, iPod Touch®, and iPad® devices from Apple Inc. of Cupertino, California Other portable electronic devices, such as laptops or tablet computers with touch-sensitive surfaces (e.g., touch screen displays and/or touchpads), are, optionally, used. It should also be understood that, in some embodiments, the device is not a portable communications device, but is a desktop computer with a touch-sensitive surface (e.g., a touch screen display and/or a touchpad). 
     In the discussion that follows, an electronic device that includes a display and a touch-sensitive surface is described. It should be understood, however, that the electronic device optionally includes one or more other physical user-interface devices, such as a physical keyboard, a mouse, and/or a joystick. 
     The device typically supports a variety of applications, such as one or more of the following: a drawing application, a presentation application, a word processing application, a website creation application, a disk authoring application, a spreadsheet application, a gaming application, a telephone application, a video conferencing application, an e-mail application, an instant messaging application, a workout support application, a photo management application, a digital camera application, a digital video camera application, a web browsing application, a digital music player application, and/or a digital video player application. 
     The various applications that are executed on the device optionally use at least one common physical user-interface device, such as the touch-sensitive surface. One or more functions of the touch-sensitive surface as well as corresponding information displayed on the device are, optionally, adjusted and/or varied from one application to the next and/or within a respective application. In this way, a common physical architecture (such as the touch-sensitive surface) of the device optionally supports the variety of applications with user interfaces that are intuitive and transparent to the user. 
     Attention is now directed toward embodiments of portable devices with touch-sensitive displays.  FIG.  1 A  is a block diagram illustrating portable multifunction device  100  with touch-sensitive display system  112  in accordance with some embodiments. Touch-sensitive display  112  is sometimes called a “touch screen” for convenience and is sometimes known as or called a “touch-sensitive display system.” Device  100  includes memory  102  (which optionally includes one or more computer-readable storage mediums), memory controller  122 , one or more processing units (CPUs)  120 , peripherals interface  118 , RF circuitry  108 , audio circuitry  110 , speaker  111 , microphone  113 , input/output (I/O) subsystem  106 , other input control devices  116 , and external port  124 . Device  100  optionally includes one or more optical sensors  164 . Device  100  optionally includes one or more contact intensity sensors  165  for detecting intensity of contacts on device  100  (e.g., a touch-sensitive surface such as touch-sensitive display system  112  of device  100 ). Device  100  optionally includes one or more tactile output generators  167  for generating tactile outputs on device  100  (e.g., generating tactile outputs on a touch-sensitive surface such as touch-sensitive display system  112  of device  100  or touchpad  355  of device  300 ). These components optionally communicate over one or more communication buses or signal lines  103 . 
     As used in the specification and claims, the term “intensity” of a contact on a touch-sensitive surface refers to the force or pressure (force per unit area) of a contact (e.g., a finger contact) on the touch-sensitive surface, or to a substitute (proxy) for the force or pressure of a contact on the touch-sensitive surface. The intensity of a contact has a range of values that includes at least four distinct values and more typically includes hundreds of distinct values (e.g., at least 256). Intensity of a contact is, optionally, determined (or measured) using various approaches and various sensors or combinations of sensors. For example, one or more force sensors underneath or adjacent to the touch-sensitive surface are, optionally, used to measure force at various points on the touch-sensitive surface. In some implementations, force measurements from multiple force sensors are combined (e.g., a weighted average) to determine an estimated force of a contact. Similarly, a pressure-sensitive tip of a stylus is, optionally, used to determine a pressure of the stylus on the touch-sensitive surface. Alternatively, the size of the contact area detected on the touch-sensitive surface and/or changes thereto, the capacitance of the touch-sensitive surface proximate to the contact and/or changes thereto, and/or the resistance of the touch-sensitive surface proximate to the contact and/or changes thereto are, optionally, used as a substitute for the force or pressure of the contact on the touch-sensitive surface. In some implementations, the substitute measurements for contact force or pressure are used directly to determine whether an intensity threshold has been exceeded (e.g., the intensity threshold is described in units corresponding to the substitute measurements). In some implementations, the substitute measurements for contact force or pressure are converted to an estimated force or pressure, and the estimated force or pressure is used to determine whether an intensity threshold has been exceeded (e.g., the intensity threshold is a pressure threshold measured in units of pressure). Using the intensity of a contact as an attribute of a user input allows for user access to additional device functionality that may otherwise not be accessible by the user on a reduced-size device with limited real estate for displaying affordances (e.g., on a touch-sensitive display) and/or receiving user input (e.g., via a touch-sensitive display, a touch-sensitive surface, or a physical/mechanical control such as a knob or a button). 
     As used in the specification and claims, the term “tactile output” refers to physical displacement of a device relative to a previous position of the device, physical displacement of a component (e.g., a touch-sensitive surface) of a device relative to another component (e.g., housing) of the device, or displacement of the component relative to a center of mass of the device that will be detected by a user with the user&#39;s sense of touch. For example, in situations where the device or the component of the device is in contact with a surface of a user that is sensitive to touch (e.g., a finger, palm, or other part of a user&#39;s hand), the tactile output generated by the physical displacement will be interpreted by the user as a tactile sensation corresponding to a perceived change in physical characteristics of the device or the component of the device. For example, movement of a touch-sensitive surface (e.g., a touch-sensitive display or trackpad) is, optionally, interpreted by the user as a “down click” or “up click” of a physical actuator button. In some cases, a user will feel a tactile sensation such as an “down click” or “up click” even when there is no movement of a physical actuator button associated with the touch-sensitive surface that is physically pressed (e.g., displaced) by the user&#39;s movements. As another example, movement of the touch-sensitive surface is, optionally, interpreted or sensed by the user as “roughness” of the touch-sensitive surface, even when there is no change in smoothness of the touch-sensitive surface. While such interpretations of touch by a user will be subject to the individualized sensory perceptions of the user, there are many sensory perceptions of touch that are common to a large majority of users. Thus, when a tactile output is described as corresponding to a particular sensory perception of a user (e.g., an “up click,” a “down click,” “roughness”), unless otherwise stated, the generated tactile output corresponds to physical displacement of the device or a component thereof that will generate the described sensory perception for a typical (or average) user. 
     It should be appreciated that device  100  is only one example of a portable multifunction device, and that device  100  optionally has more or fewer components than shown, optionally combines two or more components, or optionally has a different configuration or arrangement of the components. The various components shown in  FIG.  1 A  are implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application-specific integrated circuits. 
     Memory  102  optionally includes high-speed random access memory and optionally also includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Memory controller  122  optionally controls access to memory  102  by other components of device  100 . 
     Peripherals interface  118  are optionally used to couple input and output peripherals of the device to CPU  120  and memory  102 . The one or more processors  120  run or execute various software programs and/or sets of instructions stored in memory  102  to perform various functions for device  100  and to process data. In some embodiments, peripherals interface  118 , CPU  120 , and memory controller  122  are, optionally, implemented on a single chip, such as chip  104 . In some other embodiments, they are, optionally, implemented on separate chips. 
     RF (radio frequency) circuitry  108  receives and sends RF signals, also called electromagnetic signals. RF circuitry  108  converts electrical signals to/from electromagnetic signals and communicates with communications networks and other communications devices via the electromagnetic signals. RF circuitry  108  optionally includes well-known circuitry for performing these functions, including but not limited to an antenna system, an RF transceiver, one or more amplifiers, a tuner, one or more oscillators, a digital signal processor, a CODEC chipset, a subscriber identity module (SIM) card, memory, and so forth. RF circuitry  108  optionally communicates with networks, such as the Internet, also referred to as the World Wide Web (WWW), an intranet and/or a wireless network, such as a cellular telephone network, a wireless local area network (LAN) and/or a metropolitan area network (MAN), and other devices by wireless communication. The RF circuitry  108  optionally includes well-known circuitry for detecting near field communication (NFC) fields, such as by a short-range communication radio. The wireless communication optionally uses any of a plurality of communications standards, protocols, and technologies, including but not limited to Global System for Mobile Communications (GSM), Enhanced Data GSM Environment (EDGE), high-speed downlink packet access (HSDPA), high-speed uplink packet access (HSUPA), Evolution, Data-Only (EV-DO), HSPA, HSPA+, Dual-Cell HSPA (DC-HSPDA), long term evolution (LTE), near field communication (NFC), wideband code division multiple access (W-CDMA), code division multiple access (CDMA), time division multiple access (TDMA), Bluetooth, Bluetooth Low Energy (BTLE), Wireless Fidelity (Wi-Fi) (e.g., IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, and/or IEEE 802.11ac), voice over Internet Protocol (VoIP), Wi-MAX, a protocol for e-mail (e.g., Internet message access protocol (IMAP) and/or post office protocol (POP)), instant messaging (e.g., extensible messaging and presence protocol (XMPP), Session Initiation Protocol for Instant Messaging and Presence Leveraging Extensions (SIMPLE), Instant Messaging and Presence Service (IMPS)), and/or Short Message Service (SMS), or any other suitable communication protocol, including communication protocols not yet developed as of the filing date of this document. 
     Audio circuitry  110 , speaker  111 , and microphone  113  provide an audio interface between a user and device  100 . Audio circuitry  110  receives audio data from peripherals interface  118 , converts the audio data to an electrical signal, and transmits the electrical signal to speaker  111 . Speaker  111  converts the electrical signal to human-audible sound waves. Audio circuitry  110  also receives electrical signals converted by microphone  113  from sound waves. Audio circuitry  110  converts the electrical signal to audio data and transmits the audio data to peripherals interface  118  for processing. Audio data is, optionally, retrieved from and/or transmitted to memory  102  and/or RF circuitry  108  by peripherals interface  118 . In some embodiments, audio circuitry  110  also includes a headset jack (e.g.,  212 ,  FIG.  2   ). The headset jack provides an interface between audio circuitry  110  and removable audio input/output peripherals, such as output-only headphones or a headset with both output (e.g., a headphone for one or both ears) and input (e.g., a microphone). 
     I/O subsystem  106  couples input/output peripherals on device  100 , such as touch screen  112  and other input control devices  116 , to peripherals interface  118 . I/O subsystem  106  optionally includes display controller  156 , optical sensor controller  158 , intensity sensor controller  159 , haptic feedback controller  161 , and one or more input controllers  160  for other input or control devices. The one or more input controllers  160  receive/send electrical signals from/to other input control devices  116 . The other input control devices  116  optionally include physical buttons (e.g., push buttons, rocker buttons, etc.), dials, slider switches, joysticks, click wheels, and so forth. In some alternate embodiments, input controller(s)  160  are, optionally, coupled to any (or none) of the following: a keyboard, an infrared port, a USB port, and a pointer device such as a mouse. The one or more buttons (e.g.,  208 ,  FIG.  2   ) optionally include an up/down button for volume control of speaker  111  and/or microphone  113 . The one or more buttons optionally include a push button (e.g.,  206 ,  FIG.  2   ). 
     A quick press of the push button optionally disengages a lock of touch screen  112  or optionally begins a process that uses gestures on the touch screen to unlock the device, as described in U.S. patent application Ser. No. 11/322,549, “Unlocking a Device by Performing Gestures on an Unlock Image,” filed Dec. 23, 2005, U.S. Pat. No. 7,657,849, which is hereby incorporated by reference in its entirety. A longer press of the push button (e.g.,  206 ) optionally turns power to device  100  on or off. The functionality of one or more of the buttons are, optionally, user-customizable. Touch screen  112  is used to implement virtual or soft buttons and one or more soft keyboards. 
     Touch-sensitive display  112  provides an input interface and an output interface between the device and a user. Display controller  156  receives and/or sends electrical signals from/to touch screen  112 . Touch screen  112  displays visual output to the user. The visual output optionally includes graphics, text, icons, video, and any combination thereof (collectively termed “graphics”). In some embodiments, some or all of the visual output optionally corresponds to user-interface objects. 
     Touch screen  112  has a touch-sensitive surface, sensor, or set of sensors that accepts input from the user based on haptic and/or tactile contact. Touch screen  112  and display controller  156  (along with any associated modules and/or sets of instructions in memory  102 ) detect contact (and any movement or breaking of the contact) on touch screen  112  and convert the detected contact into interaction with user-interface objects (e.g., one or more soft keys, icons, web pages, or images) that are displayed on touch screen  112 . In an exemplary embodiment, a point of contact between touch screen  112  and the user corresponds to a finger of the user. 
     Touch screen  112  optionally uses LCD (liquid crystal display) technology, LPD (light emitting polymer display) technology, or LED (light emitting diode) technology, although other display technologies are used in other embodiments. Touch screen  112  and display controller  156  optionally detect contact and any movement or breaking thereof using any of a plurality of touch sensing technologies now known or later developed, including but not limited to capacitive, resistive, infrared, and surface acoustic wave technologies, as well as other proximity sensor arrays or other elements for determining one or more points of contact with touch screen  112 . In an exemplary embodiment, projected mutual capacitance sensing technology is used, such as that found in the iPhone® and iPod Touch® from Apple Inc. of Cupertino, California 
     A touch-sensitive display in some embodiments of touch screen  112  is, optionally, analogous to the multi-touch sensitive touchpads described in the following U.S. Pat. No. 6,323,846 (Westerman et al.), U.S. Pat. No. 6,570,557 (Westerman et al.), and/or U.S. Pat. No. 6,677,932 (Westerman), and/or U.S. Patent Publication 2002/0015024A1, each of which is hereby incorporated by reference in its entirety. However, touch screen  112  displays visual output from device  100 , whereas touch-sensitive touchpads do not provide visual output. 
     A touch-sensitive display in some embodiments of touch screen  112  is described in the following applications: (1) U.S. patent application Ser. No. 11/381,313, “Multipoint Touch Surface Controller,” filed May 2, 2006; (2) U.S. patent application Ser. No. 10/840,862, “Multipoint Touchscreen,” filed May 6, 2004; (3) U.S. patent application Ser. No. 10/903,964, “Gestures For Touch Sensitive Input Devices,” filed Jul. 30, 2004; (4) U.S. patent application Ser. No. 11/048,264, “Gestures For Touch Sensitive Input Devices,” filed Jan. 31, 2005; (5) U.S. patent application Ser. No. 11/038,590, “Mode-Based Graphical User Interfaces For Touch Sensitive Input Devices,” filed Jan. 18, 2005; (6) U.S. patent application Ser. No. 11/228,758, “Virtual Input Device Placement On A Touch Screen User Interface,” filed Sep. 16, 2005; (7) U.S. patent application Ser. No. 11/228,700, “Operation Of A Computer With A Touch Screen Interface,” filed Sep. 16, 2005; (8) U.S. patent application Ser. No. 11/228,737, “Activating Virtual Keys Of A Touch-Screen Virtual Keyboard,” filed Sep. 16, 2005; and (9) U.S. patent application Ser. No. 11/367,749, “Multi-Functional Hand-Held Device,” filed Mar. 3, 2006. All of these applications are incorporated by reference herein in their entirety. 
     Touch screen  112  optionally has a video resolution in excess of 100 dpi. In some embodiments, the touch screen has a video resolution of approximately 160 dpi. The user optionally makes contact with touch screen  112  using any suitable object or appendage, such as a stylus, a finger, and so forth. In some embodiments, the user interface is designed to work primarily with finger-based contacts and gestures, which can be less precise than stylus-based input due to the larger area of contact of a finger on the touch screen. In some embodiments, the device translates the rough finger-based input into a precise pointer/cursor position or command for performing the actions desired by the user. 
     In some embodiments, in addition to the touch screen, device  100  optionally includes a touchpad (not shown) for activating or deactivating particular functions. In some embodiments, the touchpad is a touch-sensitive area of the device that, unlike the touch screen, does not display visual output. The touchpad is, optionally, a touch-sensitive surface that is separate from touch screen  112  or an extension of the touch-sensitive surface formed by the touch screen. 
     Device  100  also includes power system  162  for powering the various components. Power system  162  optionally includes a power management system, one or more power sources (e.g., battery, alternating current (AC)), a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator (e.g., a light-emitting diode (LED)) and any other components associated with the generation, management and distribution of power in portable devices. 
     Device  100  optionally also includes one or more optical sensors  164 .  FIG.  1 A  shows an optical sensor coupled to optical sensor controller  158  in I/O subsystem  106 . Optical sensor  164  optionally includes charge-coupled device (CCD) or complementary metal-oxide semiconductor (CMOS) phototransistors. Optical sensor  164  receives light from the environment, projected through one or more lenses, and converts the light to data representing an image. In conjunction with imaging module  143  (also called a camera module), optical sensor  164  optionally captures still images or video. In some embodiments, an optical sensor is located on the back of device  100 , opposite touch screen display  112  on the front of the device so that the touch screen display is enabled for use as a viewfinder for still and/or video image acquisition. In some embodiments, an optical sensor is located on the front of the device so that the user&#39;s image is, optionally, obtained for video conferencing while the user views the other video conference participants on the touch screen display. In some embodiments, the position of optical sensor  164  can be changed by the user (e.g., by rotating the lens and the sensor in the device housing) so that a single optical sensor  164  is used along with the touch screen display for both video conferencing and still and/or video image acquisition. 
     Device  100  optionally also includes one or more contact intensity sensors  165 .  FIG.  1 A  shows a contact intensity sensor coupled to intensity sensor controller  159  in I/O subsystem  106 . Contact intensity sensor  165  optionally includes one or more piezoresistive strain gauges, capacitive force sensors, electric force sensors, piezoelectric force sensors, optical force sensors, capacitive touch-sensitive surfaces, or other intensity sensors (e.g., sensors used to measure the force (or pressure) of a contact on a touch-sensitive surface). Contact intensity sensor  165  receives contact intensity information (e.g., pressure information or a proxy for pressure information) from the environment. In some embodiments, at least one contact intensity sensor is collocated with, or proximate to, a touch-sensitive surface (e.g., touch-sensitive display system  112 ). In some embodiments, at least one contact intensity sensor is located on the back of device  100 , opposite touch screen display  112 , which is located on the front of device  100 . 
     Device  100  optionally also includes one or more proximity sensors  166 .  FIG.  1 A  shows proximity sensor  166  coupled to peripherals interface  118 . Alternately, proximity sensor  166  is, optionally, coupled to input controller  160  in I/O subsystem  106 . Proximity sensor  166  optionally performs as described in U.S. patent application Ser. No. 11/241,839, “Proximity Detector In Handheld Device”; Ser. No. 11/240,788, “Proximity Detector In Handheld Device”; Ser. No. 11/620,702, “Using Ambient Light Sensor To Augment Proximity Sensor Output”; Ser. No. 11/586,862, “Automated Response To And Sensing Of User Activity In Portable Devices”; and Ser. No. 11/638,251, “Methods And Systems For Automatic Configuration Of Peripherals,” which are hereby incorporated by reference in their entirety. In some embodiments, the proximity sensor turns off and disables touch screen  112  when the multifunction device is placed near the user&#39;s ear (e.g., when the user is making a phone call). 
     Device  100  optionally also includes one or more tactile output generators  167 .  FIG.  1 A  shows a tactile output generator coupled to haptic feedback controller  161  in I/O subsystem  106 . Tactile output generator  167  optionally includes one or more electroacoustic devices such as speakers or other audio components and/or electromechanical devices that convert energy into linear motion such as a motor, solenoid, electroactive polymer, piezoelectric actuator, electrostatic actuator, or other tactile output generating component (e.g., a component that converts electrical signals into tactile outputs on the device). Contact intensity sensor  165  receives tactile feedback generation instructions from haptic feedback module  133  and generates tactile outputs on device  100  that are capable of being sensed by a user of device  100 . In some embodiments, at least one tactile output generator is collocated with, or proximate to, a touch-sensitive surface (e.g., touch-sensitive display system  112 ) and, optionally, generates a tactile output by moving the touch-sensitive surface vertically (e.g., in/out of a surface of device  100 ) or laterally (e.g., back and forth in the same plane as a surface of device  100 ). In some embodiments, at least one tactile output generator sensor is located on the back of device  100 , opposite touch screen display  112 , which is located on the front of device  100 . 
     Device  100  optionally also includes one or more accelerometers  168 .  FIG.  1 A  shows accelerometer  168  coupled to peripherals interface  118 . Alternately, accelerometer  168  is, optionally, coupled to an input controller  160  in I/O subsystem  106 . Accelerometer  168  optionally performs as described in U.S. Patent Publication No. 20050190059, “Acceleration-based Theft Detection System for Portable Electronic Devices,” and U.S. Patent Publication No. 20060017692, “Methods And Apparatuses For Operating A Portable Device Based On An Accelerometer,” both of which are incorporated by reference herein in their entirety. In some embodiments, information is displayed on the touch screen display in a portrait view or a landscape view based on an analysis of data received from the one or more accelerometers. Device  100  optionally includes, in addition to accelerometer(s)  168 , a magnetometer (not shown) and a GPS (or GLONASS or other global navigation system) receiver (not shown) for obtaining information concerning the location and orientation (e.g., portrait or landscape) of device  100 . 
     In some embodiments, the software components stored in memory  102  include operating system  126 , communication module (or set of instructions)  128 , contact/motion module (or set of instructions)  130 , graphics module (or set of instructions)  132 , text input module (or set of instructions)  134 , Global Positioning System (GPS) module (or set of instructions)  135 , and applications (or sets of instructions)  136 . Furthermore, in some embodiments, memory  102  ( FIG.  1 A ) or  370  ( FIG.  3   ) stores device/global internal state  157 , as shown in  FIGS.  1 A and  3   . Device/global internal state  157  includes one or more of: active application state, indicating which applications, if any, are currently active; display state, indicating what applications, views or other information occupy various regions of touch screen display  112 ; sensor state, including information obtained from the device&#39;s various sensors and input control devices  116 ; and location information concerning the device&#39;s location and/or attitude. 
     Operating system  126  (e.g., Darwin, RTXC, LINUX, UNIX, OS X, iOS, WINDOWS, or an embedded operating system such as VxWorks) includes various software components and/or drivers for controlling and managing general system tasks (e.g., memory management, storage device control, power management, etc.) and facilitates communication between various hardware and software components. 
     Communication module  128  facilitates communication with other devices over one or more external ports  124  and also includes various software components for handling data received by RF circuitry  108  and/or external port  124 . External port  124  (e.g., Universal Serial Bus (USB), FIREWIRE, etc.) is adapted for coupling directly to other devices or indirectly over a network (e.g., the Internet, wireless LAN, etc.). In some embodiments, the external port is a multi-pin (e.g., 30-pin) connector that is the same as, or similar to and/or compatible with, the 30-pin connector used on iPod® (trademark of Apple Inc.) devices. 
     Contact/motion module  130  optionally detects contact with touch screen  112  (in conjunction with display controller  156 ) and other touch-sensitive devices (e.g., a touchpad or physical click wheel). Contact/motion module  130  includes various software components for performing various operations related to detection of contact, such as determining if contact has occurred (e.g., detecting a finger-down event), determining an intensity of the contact (e.g., the force or pressure of the contact or a substitute for the force or pressure of the contact), determining if there is movement of the contact and tracking the movement across the touch-sensitive surface (e.g., detecting one or more finger-dragging events), and determining if the contact has ceased (e.g., detecting a finger-up event or a break in contact). Contact/motion module  130  receives contact data from the touch-sensitive surface. Determining movement of the point of contact, which is represented by a series of contact data, optionally includes determining speed (magnitude), velocity (magnitude and direction), and/or an acceleration (a change in magnitude and/or direction) of the point of contact. These operations are, optionally, applied to single contacts (e.g., one finger contacts) or to multiple simultaneous contacts (e.g., “multitouch”/multiple finger contacts). In some embodiments, contact/motion module  130  and display controller  156  detect contact on a touchpad. 
     In some embodiments, contact/motion module  130  uses a set of one or more intensity thresholds to determine whether an operation has been performed by a user (e.g., to determine whether a user has “clicked” on an icon). In some embodiments, at least a subset of the intensity thresholds is determined in accordance with software parameters (e.g., the intensity thresholds are not determined by the activation thresholds of particular physical actuators and can be optionally adjusted without changing the physical hardware of device  100 ). For example, a mouse “click” threshold of a trackpad or touch screen display is optionally set to any of a large range of predefined threshold values without changing the trackpad or touch screen display hardware. Additionally, in some implementations, a user of the device is provided with software settings for adjusting one or more of the set of intensity thresholds (e.g., by adjusting individual intensity thresholds and/or by adjusting a plurality of intensity thresholds at once with a system-level click “intensity” parameter). 
     Contact/motion module  130  optionally detects a gesture input by a user. Different gestures on the touch-sensitive surface have different contact patterns (e.g., different motions, timings, and/or intensities of detected contacts). Thus, a gesture is, optionally, detected by detecting a particular contact pattern. For example, detecting a finger tap gesture includes detecting a finger-down event followed by detecting a finger-up (liftoff) event at the same position (or substantially the same position) as the finger-down event (e.g., at the position of an icon). As another example, detecting a finger swipe gesture on the touch-sensitive surface includes detecting a finger-down event followed by detecting one or more finger-dragging events, and subsequently followed by detecting a finger-up (liftoff) event. 
     Graphics module  132  includes various known software components for rendering and displaying graphics on touch screen  112  or other display, including components for changing the visual impact (e.g., brightness, transparency, saturation, contrast, or other visual property) of graphics that are displayed. As used herein, the term “graphics” includes any object that can be displayed to a user, including, without limitation, text, web pages, icons (such as user-interface objects including soft keys), digital images, videos, animations, and the like. 
     In some embodiments, graphics module  132  stores data representing graphics to be used. Each graphic is, optionally, assigned a corresponding code. Graphics module  132  receives, from applications etc., one or more codes specifying graphics to be displayed along with, if necessary, coordinate data and other graphic property data, and then generates screen image data to output to display controller  156 . 
     Haptic feedback module  133  includes various software components for generating instructions used by tactile output generator(s)  167  to produce tactile outputs at one or more locations on device  100  in response to user interactions with device  100 . 
     Text input module  134 , which is, optionally, a component of graphics module  132 , provides soft keyboards for entering text in various applications (e.g., contacts  137 , e-mail  140 , IM  141 , browser  147 , and any other application that needs text input). 
     GPS module  135  determines the location of the device and provides this information for use in various applications (e.g., to telephone module  138  for use in location-based dialing; to camera module  143  as picture/video metadata; and to applications that provide location-based services such as weather widgets, local yellow page widgets, and map/navigation widgets). 
     Applications  136  optionally include the following modules (or sets of instructions), or a subset or superset thereof:
         Contacts module  137  (sometimes called an address book or contact list);   Telephone module  138 ;   Video conference module  139 ;   E-mail client module  140 ;   Instant messaging (IM) module  141 ;   Workout support module  142 ;   Camera module  143  for still and/or video images;   Image management module  144 ;   Video player module;   Music player module;   Browser module  147 ;   Calendar module  148 ;   Widget modules  149 , which optionally include one or more of: weather widget  149 - 1 , stocks widget  149 - 2 , calculator widget  149 - 3 , alarm clock widget  149 - 4 , dictionary widget  149 - 5 , and other widgets obtained by the user, as well as user-created widgets  149 - 6 ;   Widget creator module  150  for making user-created widgets  149 - 6 ;   Search module  151 ;   Video and music player module  152 , which merges video player module and music player module;   Notes module  153 ;   Map module  154 ; and/or   Online video module  155 .       

     Examples of other applications  136  that are, optionally, stored in memory  102  include other word processing applications, other image editing applications, drawing applications, presentation applications, JAVA-enabled applications, encryption, digital rights management, voice recognition, and voice replication. 
     In conjunction with touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , contacts module  137  are, optionally, used to manage an address book or contact list (e.g., stored in application internal state  192  of contacts module  137  in memory  102  or memory  370 ), including: adding name(s) to the address book; deleting name(s) from the address book; associating telephone number(s), e-mail address(es), physical address(es) or other information with a name; associating an image with a name; categorizing and sorting names; providing telephone numbers or e-mail addresses to initiate and/or facilitate communications by telephone module  138 , video conference module  139 , e-mail  140 , or IM  141 ; and so forth. 
     In conjunction with RF circuitry  108 , audio circuitry  110 , speaker  111 , microphone  113 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , telephone module  138  are, optionally, used to enter a sequence of characters corresponding to a telephone number, access one or more telephone numbers in contacts module  137 , modify a telephone number that has been entered, dial a respective telephone number, conduct a conversation, and disconnect or hang up when the conversation is completed. As noted above, the wireless communication optionally uses any of a plurality of communications standards, protocols, and technologies. 
     In conjunction with RF circuitry  108 , audio circuitry  110 , speaker  111 , microphone  113 , touch screen  112 , display controller  156 , optical sensor  164 , optical sensor controller  158 , contact/motion module  130 , graphics module  132 , text input module  134 , contacts module  137 , and telephone module  138 , video conference module  139  includes executable instructions to initiate, conduct, and terminate a video conference between a user and one or more other participants in accordance with user instructions. 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , e-mail client module  140  includes executable instructions to create, send, receive, and manage e-mail in response to user instructions. In conjunction with image management module  144 , e-mail client module  140  makes it very easy to create and send e-mails with still or video images taken with camera module  143 . 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , the instant messaging module  141  includes executable instructions to enter a sequence of characters corresponding to an instant message, to modify previously entered characters, to transmit a respective instant message (for example, using a Short Message Service (SMS) or Multimedia Message Service (MMS) protocol for telephony-based instant messages or using XMPP, SIMPLE, or IMPS for Internet-based instant messages), to receive instant messages, and to view received instant messages. In some embodiments, transmitted and/or received instant messages optionally include graphics, photos, audio files, video files and/or other attachments as are supported in an MMS and/or an Enhanced Messaging Service (EMS). As used herein, “instant messaging” refers to both telephony-based messages (e.g., messages sent using SMS or MMS) and Internet-based messages (e.g., messages sent using XMPP, SIMPLE, or IMPS). 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , text input module  134 , GPS module  135 , map module  154 , and music player module, workout support module  142  includes executable instructions to create workouts (e.g., with time, distance, and/or calorie burning goals); communicate with workout sensors (sports devices); receive workout sensor data; calibrate sensors used to monitor a workout; select and play music for a workout; and display, store, and transmit workout data. 
     In conjunction with touch screen  112 , display controller  156 , optical sensor(s)  164 , optical sensor controller  158 , contact/motion module  130 , graphics module  132 , and image management module  144 , camera module  143  includes executable instructions to capture still images or video (including a video stream) and store them into memory  102 , modify characteristics of a still image or video, or delete a still image or video from memory  102 . 
     In conjunction with touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , text input module  134 , and camera module  143 , image management module  144  includes executable instructions to arrange, modify (e.g., edit), or otherwise manipulate, label, delete, present (e.g., in a digital slide show or album), and store still and/or video images. 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , browser module  147  includes executable instructions to browse the Internet in accordance with user instructions, including searching, linking to, receiving, and displaying web pages or portions thereof, as well as attachments and other files linked to web pages. 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , text input module  134 , e-mail client module  140 , and browser module  147 , calendar module  148  includes executable instructions to create, display, modify, and store calendars and data associated with calendars (e.g., calendar entries, to-do lists, etc.) in accordance with user instructions. 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , text input module  134 , and browser module  147 , widget modules  149  are mini-applications that are, optionally, downloaded and used by a user (e.g., weather widget  149 - 1 , stocks widget  149 - 2 , calculator widget  149 - 3 , alarm clock widget  149 - 4 , and dictionary widget  149 - 5 ) or created by the user (e.g., user-created widget  149 - 6 ). In some embodiments, a widget includes an HTML (Hypertext Markup Language) file, a CSS (Cascading Style Sheets) file, and a JavaScript file. In some embodiments, a widget includes an XML (Extensible Markup Language) file and a JavaScript file (e.g., Yahoo! Widgets). 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , text input module  134 , and browser module  147 , the widget creator module  150  are, optionally, used by a user to create widgets (e.g., turning a user-specified portion of a web page into a widget). 
     In conjunction with touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , search module  151  includes executable instructions to search for text, music, sound, image, video, and/or other files in memory  102  that match one or more search criteria (e.g., one or more user-specified search terms) in accordance with user instructions. 
     In conjunction with touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , audio circuitry  110 , speaker  111 , RF circuitry  108 , and browser module  147 , video and music player module  152  includes executable instructions that allow the user to download and play back recorded music and other sound files stored in one or more file formats, such as MP3 or AAC files, and executable instructions to display, present, or otherwise play back videos (e.g., on touch screen  112  or on an external, connected display via external port  124 ). In some embodiments, device  100  optionally includes the functionality of an MP3 player, such as an iPod (trademark of Apple Inc.). 
     In conjunction with touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , and text input module  134 , notes module  153  includes executable instructions to create and manage notes, to-do lists, and the like in accordance with user instructions. 
     In conjunction with RF circuitry  108 , touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , text input module  134 , GPS module  135 , and browser module  147 , map module  154  are, optionally, used to receive, display, modify, and store maps and data associated with maps (e.g., driving directions, data on stores and other points of interest at or near a particular location, and other location-based data) in accordance with user instructions. 
     In conjunction with touch screen  112 , display controller  156 , contact/motion module  130 , graphics module  132 , audio circuitry  110 , speaker  111 , RF circuitry  108 , text input module  134 , e-mail client module  140 , and browser module  147 , online video module  155  includes instructions that allow the user to access, browse, receive (e.g., by streaming and/or download), play back (e.g., on the touch screen or on an external, connected display via external port  124 ), send an e-mail with a link to a particular online video, and otherwise manage online videos in one or more file formats, such as H.264. In some embodiments, instant messaging module  141 , rather than e-mail client module  140 , is used to send a link to a particular online video. Additional description of the online video application can be found in U.S. Provisional Patent Application No. 60/936,562, “Portable Multifunction Device, Method, and Graphical User Interface for Playing Online Videos,” filed Jun. 20, 2007, and U.S. patent application Ser. No. 11/968,067, “Portable Multifunction Device, Method, and Graphical User Interface for Playing Online Videos,” filed Dec. 31, 2007, the contents of which are hereby incorporated by reference in their entirety. 
     Each of the above-identified modules and applications corresponds to a set of executable instructions for performing one or more functions described above and the methods described in this application (e.g., the computer-implemented methods and other information processing methods described herein). These modules (e.g., sets of instructions) need not be implemented as separate software programs, procedures, or modules, and thus various subsets of these modules are, optionally, combined or otherwise rearranged in various embodiments. For example, video player module is, optionally, combined with music player module into a single module (e.g., video and music player module  152 ,  FIG.  1 A ). In some embodiments, memory  102  optionally stores a subset of the modules and data structures identified above. Furthermore, memory  102  optionally stores additional modules and data structures not described above. 
     In some embodiments, device  100  is a device where operation of a predefined set of functions on the device is performed exclusively through a touch screen and/or a touchpad. By using a touch screen and/or a touchpad as the primary input control device for operation of device  100 , the number of physical input control devices (such as push buttons, dials, and the like) on device  100  is, optionally, reduced. 
     The predefined set of functions that are performed exclusively through a touch screen and/or a touchpad optionally include navigation between user interfaces. In some embodiments, the touchpad, when touched by the user, navigates device  100  to a main, home, or root menu from any user interface that is displayed on device  100 . In such embodiments, a “menu button” is implemented using a touchpad. In some other embodiments, the menu button is a physical push button or other physical input control device instead of a touchpad. 
       FIG.  1 B  is a block diagram illustrating exemplary components for event handling in accordance with some embodiments. In some embodiments, memory  102  ( FIG.  1 A ) or  370  ( FIG.  3   ) includes event sorter  170  (e.g., in operating system  126 ) and a respective application  136 - 1  (e.g., any of the aforementioned applications  137 - 151 ,  155 ,  380 - 390 ). 
     Event sorter  170  receives event information and determines the application  136 - 1  and application view  191  of application  136 - 1  to which to deliver the event information. Event sorter  170  includes event monitor  171  and event dispatcher module  174 . In some embodiments, application  136 - 1  includes application internal state  192 , which indicates the current application view(s) displayed on touch-sensitive display  112  when the application is active or executing. In some embodiments, device/global internal state  157  is used by event sorter  170  to determine which application(s) is (are) currently active, and application internal state  192  is used by event sorter  170  to determine application views  191  to which to deliver event information. 
     In some embodiments, application internal state  192  includes additional information, such as one or more of: resume information to be used when application  136 - 1  resumes execution, user interface state information that indicates information being displayed or that is ready for display by application  136 - 1 , a state queue for enabling the user to go back to a prior state or view of application  136 - 1 , and a redo/undo queue of previous actions taken by the user. 
     Event monitor  171  receives event information from peripherals interface  118 . Event information includes information about a sub-event (e.g., a user touch on touch-sensitive display  112 , as part of a multi-touch gesture). Peripherals interface  118  transmits information it receives from I/O subsystem  106  or a sensor, such as proximity sensor  166 , accelerometer(s)  168 , and/or microphone  113  (through audio circuitry  110 ). Information that peripherals interface  118  receives from I/O subsystem  106  includes information from touch-sensitive display  112  or a touch-sensitive surface. 
     In some embodiments, event monitor  171  sends requests to the peripherals interface  118  at predetermined intervals. In response, peripherals interface  118  transmits event information. In other embodiments, peripherals interface  118  transmits event information only when there is a significant event (e.g., receiving an input above a predetermined noise threshold and/or for more than a predetermined duration). 
     In some embodiments, event sorter  170  also includes a hit view determination module  172  and/or an active event recognizer determination module  173 . 
     Hit view determination module  172  provides software procedures for determining where a sub-event has taken place within one or more views when touch-sensitive display  112  displays more than one view. Views are made up of controls and other elements that a user can see on the display. 
     Another aspect of the user interface associated with an application is a set of views, sometimes herein called application views or user interface windows, in which information is displayed and touch-based gestures occur. The application views (of a respective application) in which a touch is detected optionally correspond to programmatic levels within a programmatic or view hierarchy of the application. For example, the lowest level view in which a touch is detected is, optionally, called the hit view, and the set of events that are recognized as proper inputs are, optionally, determined based, at least in part, on the hit view of the initial touch that begins a touch-based gesture. 
     Hit view determination module  172  receives information related to sub-events of a touch-based gesture. When an application has multiple views organized in a hierarchy, hit view determination module  172  identifies a hit view as the lowest view in the hierarchy which should handle the sub-event. In most circumstances, the hit view is the lowest level view in which an initiating sub-event occurs (e.g., the first sub-event in the sequence of sub-events that form an event or potential event). Once the hit view is identified by the hit view determination module  172 , the hit view typically receives all sub-events related to the same touch or input source for which it was identified as the hit view. 
     Active event recognizer determination module  173  determines which view or views within a view hierarchy should receive a particular sequence of sub-events. In some embodiments, active event recognizer determination module  173  determines that only the hit view should receive a particular sequence of sub-events. In other embodiments, active event recognizer determination module  173  determines that all views that include the physical location of a sub-event are actively involved views, and therefore determines that all actively involved views should receive a particular sequence of sub-events. In other embodiments, even if touch sub-events were entirely confined to the area associated with one particular view, views higher in the hierarchy would still remain as actively involved views. 
     Event dispatcher module  174  dispatches the event information to an event recognizer (e.g., event recognizer  180 ). In embodiments including active event recognizer determination module  173 , event dispatcher module  174  delivers the event information to an event recognizer determined by active event recognizer determination module  173 . In some embodiments, event dispatcher module  174  stores in an event queue the event information, which is retrieved by a respective event receiver  182 . 
     In some embodiments, operating system  126  includes event sorter  170 . Alternatively, application  136 - 1  includes event sorter  170 . In yet other embodiments, event sorter  170  is a stand-alone module, or a part of another module stored in memory  102 , such as contact/motion module  130 . 
     In some embodiments, application  136 - 1  includes a plurality of event handlers  190  and one or more application views  191 , each of which includes instructions for handling touch events that occur within a respective view of the application&#39;s user interface. Each application view  191  of the application  136 - 1  includes one or more event recognizers  180 . Typically, a respective application view  191  includes a plurality of event recognizers  180 . In other embodiments, one or more of event recognizers  180  are part of a separate module, such as a user interface kit (not shown) or a higher level object from which application  136 - 1  inherits methods and other properties. In some embodiments, a respective event handler  190  includes one or more of: data updater  176 , object updater  177 , GUI updater  178 , and/or event data  179  received from event sorter  170 . Event handler  190  optionally utilizes or calls data updater  176 , object updater  177 , or GUI updater  178  to update the application internal state  192 . Alternatively, one or more of the application views  191  include one or more respective event handlers  190 . Also, in some embodiments, one or more of data updater  176 , object updater  177 , and GUI updater  178  are included in a respective application view  191 . 
     A respective event recognizer  180  receives event information (e.g., event data  179 ) from event sorter  170  and identifies an event from the event information. Event recognizer  180  includes event receiver  182  and event comparator  184 . In some embodiments, event recognizer  180  also includes at least a subset of: metadata  183 , and event delivery instructions  188  (which optionally include sub-event delivery instructions). 
     Event receiver  182  receives event information from event sorter  170 . The event information includes information about a sub-event, for example, a touch or a touch movement. Depending on the sub-event, the event information also includes additional information, such as location of the sub-event. When the sub-event concerns motion of a touch, the event information optionally also includes speed and direction of the sub-event. In some embodiments, events include rotation of the device from one orientation to another (e.g., from a portrait orientation to a landscape orientation, or vice versa), and the event information includes corresponding information about the current orientation (also called device attitude) of the device. 
     Event comparator  184  compares the event information to predefined event or sub-event definitions and, based on the comparison, determines an event or sub-event, or determines or updates the state of an event or sub-event. In some embodiments, event comparator  184  includes event definitions  186 . Event definitions  186  contain definitions of events (e.g., predefined sequences of sub-events), for example, event  1  ( 187 - 1 ), event  2  ( 187 - 2 ), and others. In some embodiments, sub-events in an event ( 187 ) include, for example, touch begin, touch end, touch movement, touch cancellation, and multiple touching. In one example, the definition for event  1  ( 187 - 1 ) is a double tap on a displayed object. The double tap, for example, comprises a first touch (touch begin) on the displayed object for a predetermined phase, a first liftoff (touch end) for a predetermined phase, a second touch (touch begin) on the displayed object for a predetermined phase, and a second liftoff (touch end) for a predetermined phase. In another example, the definition for event  2  ( 187 - 2 ) is a dragging on a displayed object. The dragging, for example, comprises a touch (or contact) on the displayed object for a predetermined phase, a movement of the touch across touch-sensitive display  112 , and liftoff of the touch (touch end). In some embodiments, the event also includes information for one or more associated event handlers  190 . 
     In some embodiments, event definition  187  includes a definition of an event for a respective user-interface object. In some embodiments, event comparator  184  performs a hit test to determine which user-interface object is associated with a sub-event. For example, in an application view in which three user-interface objects are displayed on touch-sensitive display  112 , when a touch is detected on touch-sensitive display  112 , event comparator  184  performs a hit test to determine which of the three user-interface objects is associated with the touch (sub-event). If each displayed object is associated with a respective event handler  190 , the event comparator uses the result of the hit test to determine which event handler  190  should be activated. For example, event comparator  184  selects an event handler associated with the sub-event and the object triggering the hit test. 
     In some embodiments, the definition for a respective event ( 187 ) also includes delayed actions that delay delivery of the event information until after it has been determined whether the sequence of sub-events does or does not correspond to the event recognizer&#39;s event type. 
     When a respective event recognizer  180  determines that the series of sub-events do not match any of the events in event definitions  186 , the respective event recognizer  180  enters an event impossible, event failed, or event ended state, after which it disregards subsequent sub-events of the touch-based gesture. In this situation, other event recognizers, if any, that remain active for the hit view continue to track and process sub-events of an ongoing touch-based gesture. 
     In some embodiments, a respective event recognizer  180  includes metadata  183  with configurable properties, flags, and/or lists that indicate how the event delivery system should perform sub-event delivery to actively involved event recognizers. In some embodiments, metadata  183  includes configurable properties, flags, and/or lists that indicate how event recognizers interact, or are enabled to interact, with one another. In some embodiments, metadata  183  includes configurable properties, flags, and/or lists that indicate whether sub-events are delivered to varying levels in the view or programmatic hierarchy. 
     In some embodiments, a respective event recognizer  180  activates event handler  190  associated with an event when one or more particular sub-events of an event are recognized. In some embodiments, a respective event recognizer  180  delivers event information associated with the event to event handler  190 . Activating an event handler  190  is distinct from sending (and deferred sending) sub-events to a respective hit view. In some embodiments, event recognizer  180  throws a flag associated with the recognized event, and event handler  190  associated with the flag catches the flag and performs a predefined process. 
     In some embodiments, event delivery instructions  188  include sub-event delivery instructions that deliver event information about a sub-event without activating an event handler. Instead, the sub-event delivery instructions deliver event information to event handlers associated with the series of sub-events or to actively involved views. Event handlers associated with the series of sub-events or with actively involved views receive the event information and perform a predetermined process. 
     In some embodiments, data updater  176  creates and updates data used in application  136 - 1 . For example, data updater  176  updates the telephone number used in contacts module  137 , or stores a video file used in video player module. In some embodiments, object updater  177  creates and updates objects used in application  136 - 1 . For example, object updater  177  creates a new user-interface object or updates the position of a user-interface object. GUI updater  178  updates the GUI. For example, GUI updater  178  prepares display information and sends it to graphics module  132  for display on a touch-sensitive display. 
     In some embodiments, event handler(s)  190  includes or has access to data updater  176 , object updater  177 , and GUI updater  178 . In some embodiments, data updater  176 , object updater  177 , and GUI updater  178  are included in a single module of a respective application  136 - 1  or application view  191 . In other embodiments, they are included in two or more software modules. 
     It shall be understood that the foregoing discussion regarding event handling of user touches on touch-sensitive displays also applies to other forms of user inputs to operate multifunction devices  100  with input devices, not all of which are initiated on touch screens. For example, mouse movement and mouse button presses, optionally coordinated with single or multiple keyboard presses or holds; contact movements such as taps, drags, scrolls, etc. on touchpads; pen stylus inputs; movement of the device; oral instructions; detected eye movements; biometric inputs; and/or any combination thereof are optionally utilized as inputs corresponding to sub-events which define an event to be recognized. 
       FIG.  2    illustrates a portable multifunction device  100  having a touch screen  112  in accordance with some embodiments. The touch screen optionally displays one or more graphics within user interface (UI)  200 . In this embodiment, as well as others described below, a user is enabled to select one or more of the graphics by making a gesture on the graphics, for example, with one or more fingers  202  (not drawn to scale in the figure) or one or more styluses  203  (not drawn to scale in the figure). In some embodiments, selection of one or more graphics occurs when the user breaks contact with the one or more graphics. In some embodiments, the gesture optionally includes one or more taps, one or more swipes (from left to right, right to left, upward and/or downward), and/or a rolling of a finger (from right to left, left to right, upward and/or downward) that has made contact with device  100 . In some implementations or circumstances, inadvertent contact with a graphic does not select the graphic. For example, a swipe gesture that sweeps over an application icon optionally does not select the corresponding application when the gesture corresponding to selection is a tap. 
     Device  100  optionally also include one or more physical buttons, such as “home” or menu button  204 . As described previously, menu button  204  is, optionally, used to navigate to any application  136  in a set of applications that are, optionally, executed on device  100 . Alternatively, in some embodiments, the menu button is implemented as a soft key in a GUI displayed on touch screen  112 . 
     In some embodiments, device  100  includes touch screen  112 , menu button  204 , push button  206  for powering the device on/off and locking the device, volume adjustment button(s)  208 , subscriber identity module (SIM) card slot  210 , headset jack  212 , and docking/charging external port  124 . Push button  206  is, optionally, used to turn the power on/off on the device by depressing the button and holding the button in the depressed state for a predefined time interval; to lock the device by depressing the button and releasing the button before the predefined time interval has elapsed; and/or to unlock the device or initiate an unlock process. In an alternative embodiment, device  100  also accepts verbal input for activation or deactivation of some functions through microphone  113 . Device  100  also, optionally, includes one or more contact intensity sensors  165  for detecting intensity of contacts on touch screen  112  and/or one or more tactile output generators  167  for generating tactile outputs for a user of device  100 . 
       FIG.  3    is a block diagram of an exemplary multifunction device with a display and a touch-sensitive surface in accordance with some embodiments. Device  300  need not be portable. In some embodiments, device  300  is a laptop computer, a desktop computer, a tablet computer, a multimedia player device, a navigation device, an educational device (such as a child&#39;s learning toy), a gaming system, or a control device (e.g., a home or industrial controller). Device  300  typically includes one or more processing units (CPUs)  310 , one or more network or other communications interfaces  360 , memory  370 , and one or more communication buses  320  for interconnecting these components. Communication buses  320  optionally include circuitry (sometimes called a chipset) that interconnects and controls communications between system components. Device  300  includes input/output (I/O) interface  330  comprising display  340 , which is typically a touch screen display. I/O interface  330  also optionally includes a keyboard and/or mouse (or other pointing device)  350  and touchpad  355 , tactile output generator  357  for generating tactile outputs on device  300  (e.g., similar to tactile output generator(s)  167  described above with reference to  FIG.  1 A ), sensors  359  (e.g., optical, acceleration, proximity, touch-sensitive, and/or contact intensity sensors similar to contact intensity sensor(s)  165  described above with reference to  FIG.  1 A ). Memory  370  includes high-speed random access memory, such as DRAM, SRAM, DDR RAM, or other random access solid state memory devices; and optionally includes non-volatile memory, such as one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or other non-volatile solid state storage devices. Memory  370  optionally includes one or more storage devices remotely located from CPU(s)  310 . In some embodiments, memory  370  stores programs, modules, and data structures analogous to the programs, modules, and data structures stored in memory  102  of portable multifunction device  100  ( FIG.  1 A ), or a subset thereof. Furthermore, memory  370  optionally stores additional programs, modules, and data structures not present in memory  102  of portable multifunction device  100 . For example, memory  370  of device  300  optionally stores drawing module  380 , presentation module  382 , word processing module  384 , website creation module  386 , disk authoring module  388 , and/or spreadsheet module  390 , while memory  102  of portable multifunction device  100  ( FIG.  1 A ) optionally does not store these modules. 
     Each of the above-identified elements in  FIG.  3    is, optionally, stored in one or more of the previously mentioned memory devices. Each of the above-identified modules corresponds to a set of instructions for performing a function described above. The above-identified modules or programs (e.g., sets of instructions) need not be implemented as separate software programs, procedures, or modules, and thus various subsets of these modules are, optionally, combined or otherwise rearranged in various embodiments. In some embodiments, memory  370  optionally stores a subset of the modules and data structures identified above. Furthermore, memory  370  optionally stores additional modules and data structures not described above. 
     Attention is now directed towards embodiments of user interfaces that are, optionally, implemented on, for example, portable multifunction device  100 . 
       FIG.  4 A  illustrates an exemplary user interface for a menu of applications on portable multifunction device  100  in accordance with some embodiments. Similar user interfaces are, optionally, implemented on device  300 . In some embodiments, user interface  400  includes the following elements, or a subset or superset thereof:
         Signal strength indicator(s)  402  for wireless communication(s), such as cellular and Wi-Fi signals;   Time  404 ;   Bluetooth indicator  405 ;   Battery status indicator  406 ;   Tray  408  with icons for frequently used applications, such as:
           Icon  416  for telephone module  138 , labeled “Phone,” which optionally includes an indicator  414  of the number of missed calls or voicemail messages;   Icon  418  for e-mail client module  140 , labeled “Mail,” which optionally includes an indicator  410  of the number of unread e-mails;   Icon  420  for browser module  147 , labeled “Browser;” and   Icon  422  for video and music player module  152 , also referred to as iPod (trademark of Apple Inc.) module  152 , labeled “iPod;” and   
           Icons for other applications, such as:
           Icon  424  for IM module  141 , labeled “Messages;”   Icon  426  for calendar module  148 , labeled “Calendar;”   Icon  428  for image management module  144 , labeled “Photos;”   Icon  430  for camera module  143 , labeled “Camera;”   Icon  432  for online video module  155 , labeled “Online Video;”   Icon  434  for stocks widget  149 - 2 , labeled “Stocks;”   Icon  436  for map module  154 , labeled “Maps;”   Icon  438  for weather widget  149 - 1 , labeled “Weather;”   Icon  440  for alarm clock widget  149 - 4 , labeled “Clock;”   Icon  442  for workout support module  142 , labeled “Workout Support;”   Icon  444  for notes module  153 , labeled “Notes;” and   Icon  446  for a settings application or module, labeled “Settings,” which provides access to settings for device  100  and its various applications  136 .   
               

     It should be noted that the icon labels illustrated in  FIG.  4 A  are merely exemplary. For example, icon  422  for video and music player module  152  are labeled “Music” or “Music Player.” Other labels are, optionally, used for various application icons. In some embodiments, a label for a respective application icon includes a name of an application corresponding to the respective application icon. In some embodiments, a label for a particular application icon is distinct from a name of an application corresponding to the particular application icon. 
       FIG.  4 B  illustrates an exemplary user interface on a device (e.g., device  300 ,  FIG.  3   ) with a touch-sensitive surface  451  (e.g., a tablet or touchpad  355 ,  FIG.  3   ) that is separate from the display  450  (e.g., touch screen display  112 ). Device  300  also, optionally, includes one or more contact intensity sensors (e.g., one or more of sensors  359 ) for detecting intensity of contacts on touch-sensitive surface  451  and/or one or more tactile output generators  357  for generating tactile outputs for a user of device  300 . 
     Although some of the examples that follow will be given with reference to inputs on touch screen display  112  (where the touch-sensitive surface and the display are combined), in some embodiments, the device detects inputs on a touch-sensitive surface that is separate from the display, as shown in  FIG.  4 B . In some embodiments, the touch-sensitive surface (e.g.,  451  in  FIG.  4 B ) has a primary axis (e.g.,  452  in  FIG.  4 B ) that corresponds to a primary axis (e.g.,  453  in  FIG.  4 B ) on the display (e.g.,  450 ). In accordance with these embodiments, the device detects contacts (e.g.,  460  and  462  in  FIG.  4 B ) with the touch-sensitive surface  451  at locations that correspond to respective locations on the display (e.g., in  FIG.  4 B,  460    corresponds to  468  and  462  corresponds to  470 ). In this way, user inputs (e.g., contacts  460  and  462 , and movements thereof) detected by the device on the touch-sensitive surface (e.g.,  451  in  FIG.  4 B ) are used by the device to manipulate the user interface on the display (e.g.,  450  in  FIG.  4 B ) of the multifunction device when the touch-sensitive surface is separate from the display. It should be understood that similar methods are, optionally, used for other user interfaces described herein. 
     Additionally, while the following examples are given primarily with reference to finger inputs (e.g., finger contacts, finger tap gestures, finger swipe gestures), it should be understood that, in some embodiments, one or more of the finger inputs are replaced with input from another input device (e.g., a mouse-based input or stylus input). For example, a swipe gesture is, optionally, replaced with a mouse click (e.g., instead of a contact) followed by movement of the cursor along the path of the swipe (e.g., instead of movement of the contact). As another example, a tap gesture is, optionally, replaced with a mouse click while the cursor is located over the location of the tap gesture (e.g., instead of detection of the contact followed by ceasing to detect the contact). Similarly, when multiple user inputs are simultaneously detected, it should be understood that multiple computer mice are, optionally, used simultaneously, or a mouse and finger contacts are, optionally, used simultaneously. 
       FIG.  5 A  illustrates exemplary personal electronic device  500 . Device  500  includes body  502 . In some embodiments, device  500  optionally includes some or all of the features described with respect to devices  100  and  300  (e.g.,  FIGS.  1 A- 4 B ). In some embodiments, device  500  has touch-sensitive display screen  504 , hereafter touch screen  504 . Alternatively, or in addition to touch screen  504 , device  500  has a display and a touch-sensitive surface. As with devices  100  and  300 , in some embodiments, touch screen  504  (or the touch-sensitive surface) optionally includes one or more intensity sensors for detecting intensity of contacts (e.g., touches) being applied. The one or more intensity sensors of touch screen  504  (or the touch-sensitive surface) optionally provide output data that represents the intensity of touches. The user interface of device  500  optionally responds to touches based on their intensity, meaning that touches of different intensities can invoke different user interface operations on device  500 . 
     Exemplary techniques for detecting and processing touch intensity are found, for example, in related applications: International Patent Application Serial No. PCT/US2013/040061, titled “Device, Method, and Graphical User Interface for Displaying User Interface Objects Corresponding to an Application,” filed May 8, 2013, published as WIPO Publication No. WO/2013/169849, and International Patent Application Serial No. PCT/US2013/069483, titled “Device, Method, and Graphical User Interface for Transitioning Between Touch Input to Display Output Relationships,” filed Nov. 11, 2013, published as WIPO Publication No. WO/2014/105276, each of which is hereby incorporated by reference in their entirety. 
     In some embodiments, device  500  has one or more input mechanisms  506  and  508 . Input mechanisms  506  and  508 , if included, can be physical. Examples of physical input mechanisms include push buttons and rotatable mechanisms. In some embodiments, device  500  has one or more attachment mechanisms. Such attachment mechanisms, if included, can permit attachment of device  500  with, for example, hats, eyewear, earrings, necklaces, shirts, jackets, bracelets, watch straps, chains, trousers, belts, shoes, purses, backpacks, and so forth. These attachment mechanisms permit device  500  to be worn by a user. 
       FIG.  5 B  depicts exemplary personal electronic device  500 . In some embodiments, device  500  can include some or all of the components described with respect to  FIGS.  1 A,  1 B , and  3 . Device  500  has bus  512  that operatively couples I/O section  514  with one or more computer processors  516  and memory  518 . I/O section  514  is optionally connected to display  504 , which can have touch-sensitive component  522  and, optionally, intensity sensor  524  (e.g., contact intensity sensor). In addition, I/O section  514  is optionally connected with communication unit  530  for receiving application and operating system data, using Wi-Fi, Bluetooth, near field communication (NFC), cellular, and/or other wireless communication techniques. Device  500  optionally includes input mechanisms  506  and/or  508 . Input mechanism  506  is, optionally, a rotatable input device or a depressible and rotatable input device, for example. Input mechanism  508  is, optionally, a button, in some examples. 
     Input mechanism  508  is, optionally, a microphone, in some examples. Personal electronic device  500  optionally includes various sensors, such as GPS sensor  532 , accelerometer  534 , directional sensor  540  (e.g., compass), gyroscope  536 , motion sensor  538 , and/or a combination thereof, all of which is, optionally, operatively connected to I/O section  514 . 
     Memory  518  of personal electronic device  500  optionally includes one or more non-transitory computer-readable storage mediums, for storing computer-executable instructions, which, when executed by one or more computer processors  516 , for example, can cause the computer processors to perform the techniques described below, including processes  700 ,  900 ,  1200 ,  1500 ,  1800 , and  2000  ( FIGS.  7 A- 7 J,  9 ,  12 A- 12 H,  15 A- 15 D,  18 A- 18 E, and  20 A- 20 C ). Personal electronic device  500  is not limited to the components and configuration of  FIG.  5 B , but can include other or additional components in multiple configurations. 
     As used here, the term “affordance” refers to a user-interactive graphical user interface object that is, optionally, displayed on the display screen of devices  100 ,  300 , and/or  500  ( FIGS.  1 ,  3 , and  5   ). For example, an image (e.g., icon), a button, and text (e.g., hyperlink) each, optionally, constitute an affordance. 
     As used herein, the term “focus selector” refers to an input element that indicates a current part of a user interface with which a user is interacting. In some implementations that include a cursor or other location marker, the cursor acts as a “focus selector” so that when an input (e.g., a press input) is detected on a touch-sensitive surface (e.g., touchpad  355  in  FIG.  3    or touch-sensitive surface  451  in  FIG.  4 B ) while the cursor is over a particular user interface element (e.g., a button, window, slider, or other user interface element), the particular user interface element is adjusted in accordance with the detected input. In some implementations that include a touch screen display (e.g., touch-sensitive display system  112  in  FIG.  1 A  or touch screen  112  in  FIG.  4 A ) that enables direct interaction with user interface elements on the touch screen display, a detected contact on the touch screen acts as a “focus selector” so that when an input (e.g., a press input by the contact) is detected on the touch screen display at a location of a particular user interface element (e.g., a button, window, slider, or other user interface element), the particular user interface element is adjusted in accordance with the detected input. In some implementations, focus is moved from one region of a user interface to another region of the user interface without corresponding movement of a cursor or movement of a contact on a touch screen display (e.g., by using a tab key or arrow keys to move focus from one button to another button); in these implementations, the focus selector moves in accordance with movement of focus between different regions of the user interface. Without regard to the specific form taken by the focus selector, the focus selector is generally the user interface element (or contact on a touch screen display) that is controlled by the user so as to communicate the user&#39;s intended interaction with the user interface (e.g., by indicating, to the device, the element of the user interface with which the user is intending to interact). For example, the location of a focus selector (e.g., a cursor, a contact, or a selection box) over a respective button while a press input is detected on the touch-sensitive surface (e.g., a touchpad or touch screen) will indicate that the user is intending to activate the respective button (as opposed to other user interface elements shown on a display of the device). 
     As used in the specification and claims, the term “characteristic intensity” of a contact refers to a characteristic of the contact based on one or more intensities of the contact. In some embodiments, the characteristic intensity is based on multiple intensity samples. The characteristic intensity is, optionally, based on a predefined number of intensity samples, or a set of intensity samples collected during a predetermined time period (e.g., 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10 seconds) relative to a predefined event (e.g., after detecting the contact, prior to detecting liftoff of the contact, before or after detecting a start of movement of the contact, prior to detecting an end of the contact, before or after detecting an increase in intensity of the contact, and/or before or after detecting a decrease in intensity of the contact). A characteristic intensity of a contact is, optionally, based on one or more of: a maximum value of the intensities of the contact, a mean value of the intensities of the contact, an average value of the intensities of the contact, a top 10 percentile value of the intensities of the contact, a value at the half maximum of the intensities of the contact, a value at the 90 percent maximum of the intensities of the contact, or the like. In some embodiments, the duration of the contact is used in determining the characteristic intensity (e.g., when the characteristic intensity is an average of the intensity of the contact over time). In some embodiments, the characteristic intensity is compared to a set of one or more intensity thresholds to determine whether an operation has been performed by a user. For example, the set of one or more intensity thresholds optionally includes a first intensity threshold and a second intensity threshold. In this example, a contact with a characteristic intensity that does not exceed the first threshold results in a first operation, a contact with a characteristic intensity that exceeds the first intensity threshold and does not exceed the second intensity threshold results in a second operation, and a contact with a characteristic intensity that exceeds the second threshold results in a third operation. In some embodiments, a comparison between the characteristic intensity and one or more thresholds is used to determine whether or not to perform one or more operations (e.g., whether to perform a respective operation or forgo performing the respective operation), rather than being used to determine whether to perform a first operation or a second operation. 
     In some embodiments, a portion of a gesture is identified for purposes of determining a characteristic intensity. For example, a touch-sensitive surface optionally receives a continuous swipe contact transitioning from a start location and reaching an end location, at which point the intensity of the contact increases. In this example, the characteristic intensity of the contact at the end location is, optionally, based on only a portion of the continuous swipe contact, and not the entire swipe contact (e.g., only the portion of the swipe contact at the end location). In some embodiments, a smoothing algorithm is, optionally, applied to the intensities of the swipe contact prior to determining the characteristic intensity of the contact. For example, the smoothing algorithm optionally includes one or more of: an unweighted sliding-average smoothing algorithm, a triangular smoothing algorithm, a median filter smoothing algorithm, and/or an exponential smoothing algorithm. In some circumstances, these smoothing algorithms eliminate narrow spikes or dips in the intensities of the swipe contact for purposes of determining a characteristic intensity. 
     The intensity of a contact on the touch-sensitive surface is, optionally, characterized relative to one or more intensity thresholds, such as a contact-detection intensity threshold, a light press intensity threshold, a deep press intensity threshold, and/or one or more other intensity thresholds. In some embodiments, the light press intensity threshold corresponds to an intensity at which the device will perform operations typically associated with clicking a button of a physical mouse or a trackpad. In some embodiments, the deep press intensity threshold corresponds to an intensity at which the device will perform operations that are different from operations typically associated with clicking a button of a physical mouse or a trackpad. In some embodiments, when a contact is detected with a characteristic intensity below the light press intensity threshold (e.g., and above a nominal contact-detection intensity threshold below which the contact is no longer detected), the device will move a focus selector in accordance with movement of the contact on the touch-sensitive surface without performing an operation associated with the light press intensity threshold or the deep press intensity threshold. Generally, unless otherwise stated, these intensity thresholds are consistent between different sets of user interface figures. 
     An increase of characteristic intensity of the contact from an intensity below the light press intensity threshold to an intensity between the light press intensity threshold and the deep press intensity threshold is sometimes referred to as a “light press” input. An increase of characteristic intensity of the contact from an intensity below the deep press intensity threshold to an intensity above the deep press intensity threshold is sometimes referred to as a “deep press” input. An increase of characteristic intensity of the contact from an intensity below the contact-detection intensity threshold to an intensity between the contact-detection intensity threshold and the light press intensity threshold is sometimes referred to as detecting the contact on the touch-surface. A decrease of characteristic intensity of the contact from an intensity above the contact-detection intensity threshold to an intensity below the contact-detection intensity threshold is sometimes referred to as detecting liftoff of the contact from the touch-surface. In some embodiments, the contact-detection intensity threshold is zero. In some embodiments, the contact-detection intensity threshold is greater than zero. 
     In some embodiments described herein, one or more operations are performed in response to detecting a gesture that includes a respective press input or in response to detecting the respective press input performed with a respective contact (or a plurality of contacts), where the respective press input is detected based at least in part on detecting an increase in intensity of the contact (or plurality of contacts) above a press-input intensity threshold. In some embodiments, the respective operation is performed in response to detecting the increase in intensity of the respective contact above the press-input intensity threshold (e.g., a “down stroke” of the respective press input). In some embodiments, the press input includes an increase in intensity of the respective contact above the press-input intensity threshold and a subsequent decrease in intensity of the contact below the press-input intensity threshold, and the respective operation is performed in response to detecting the subsequent decrease in intensity of the respective contact below the press-input threshold (e.g., an “up stroke” of the respective press input). 
     In some embodiments, the device employs intensity hysteresis to avoid accidental inputs sometimes termed “jitter,” where the device defines or selects a hysteresis intensity threshold with a predefined relationship to the press-input intensity threshold (e.g., the hysteresis intensity threshold is X intensity units lower than the press-input intensity threshold or the hysteresis intensity threshold is 75%, 90%, or some reasonable proportion of the press-input intensity threshold). Thus, in some embodiments, the press input includes an increase in intensity of the respective contact above the press-input intensity threshold and a subsequent decrease in intensity of the contact below the hysteresis intensity threshold that corresponds to the press-input intensity threshold, and the respective operation is performed in response to detecting the subsequent decrease in intensity of the respective contact below the hysteresis intensity threshold (e.g., an “up stroke” of the respective press input). Similarly, in some embodiments, the press input is detected only when the device detects an increase in intensity of the contact from an intensity at or below the hysteresis intensity threshold to an intensity at or above the press-input intensity threshold and, optionally, a subsequent decrease in intensity of the contact to an intensity at or below the hysteresis intensity, and the respective operation is performed in response to detecting the press input (e.g., the increase in intensity of the contact or the decrease in intensity of the contact, depending on the circumstances). 
     For ease of explanation, the descriptions of operations performed in response to a press input associated with a press-input intensity threshold or in response to a gesture including the press input are, optionally, triggered in response to detecting either: an increase in intensity of a contact above the press-input intensity threshold, an increase in intensity of a contact from an intensity below the hysteresis intensity threshold to an intensity above the press-input intensity threshold, a decrease in intensity of the contact below the press-input intensity threshold, and/or a decrease in intensity of the contact below the hysteresis intensity threshold corresponding to the press-input intensity threshold. Additionally, in examples where an operation is described as being performed in response to detecting a decrease in intensity of a contact below the press-input intensity threshold, the operation is, optionally, performed in response to detecting a decrease in intensity of the contact below a hysteresis intensity threshold corresponding to, and lower than, the press-input intensity threshold. 
     As used herein, an “installed application” refers to a software application that has been downloaded onto an electronic device (e.g., devices  100 ,  300 , and/or  500 ) and is ready to be launched (e.g., become opened) on the device. In some embodiments, a downloaded application becomes an installed application by way of an installation program that extracts program portions from a downloaded package and integrates the extracted portions with the operating system of the computer system. 
     Attention is now directed toward embodiments of message user interfaces for sharing location information of participants in a message conversation. 
       FIG.  6 A  depicts an exemplary message user interface that is optionally displayed by device  600 . In some embodiments, the user interface is displayed on device  300  or device  500 . The message user interface includes a message region  602  for displaying messages  606  and  608  sent between a first participant (the user of device  600 ) and a second participant in a message conversation and for displaying a banner  604  including the name of the second participant and a current time of day. Messages sent between the participants are displayed inside bounded message areas. In some embodiments, a bounded message area is a contiguous region that is visually distinguished from a background of the application canvas. The message user interface also includes a location-sharing affordance  610 . 
       FIG.  6 A  illustrates the first participant requesting to share first participant location information with the second participant. The first participant selects the location-sharing affordance  610  to make the location-sharing request, and the second participant receives first participant location information during a predetermined location-sharing time period (e.g., device  600  transmits the first participant location data to a device associated with the second participant for a predetermined period of time). In the embodiment of  FIG.  6 B , first participant location information is shared via a map  612  inserted in the message transcript of messages  606  and  608  sent between the first participant and second participant in the message conversation. 
     Exemplary user interfaces and processes for sharing location information between message conversation participants are disclosed in U.S. application Ser. No. 14/503,376, filed Sep. 30, 2014 and titled “Message User Interfaces for Capture and Transmittal of Media and Location Content”, the contents of which are hereby incorporated by reference in their entirety. 
     A scheduled end  614  of the predetermined location-sharing time period is included below the map. In some embodiments, the predetermined location-sharing time period is displayed elsewhere, such as in banner  604  for example. In the embodiment of  FIG.  6 B , the predetermined location-sharing time period is two hours, scheduling an end at 1:01 p.m. for a location-sharing request detected at 11:01 a.m. In some embodiments, the predetermined location-sharing time period is a different period, is set by the user, or is set by a manufacturer and/or retailer. 
     A shared-location affordance  616  is displayed to indicate that first participant location information is currently shared with the second participant. As used herein, a location-sharing affordance can be understood to include a user-interactive graphical user interface object that permits a user to share location information by interacting with the object. As used herein, a shared-location affordance can be understood to include a user-interactive graphical user interface object that permits a user to stop sharing location information by interacting with the object. 
     In the embodiment of  FIG.  6 B , the shared-location affordance  616  is a shaded caret, to distinguish the unshaded caret of location-sharing affordance  610 . In some embodiments, another visual attribute is modified to indicate location information is currently shared. In some embodiments, a visual attribute of an information bar is modified to indicate that location information is currently shared. 
     In some embodiments, a map view (e.g., map  612 ) is provided to indicate location information is currently shared. In the embodiment of  FIG.  6 B , the map view is displayed in the message transcript between two messages; in some embodiments, the map view is displayed above the transcript, in the banner for example, or below the transcript above a keyboard. In some embodiments, the map view is displayed behind an image (photo, avatar, etc.) of the participant currently sharing information. In some embodiments, the location of a message participant is updated over time (e.g., as the user moves around) and the device displays an updated map view as the participant&#39;s location information changes. In some embodiments, an indication of location sharing includes a location-sharing status, a current address of the first participant, a travel time between the first participant and the second participant, a distance between the first participant and the second participant, and a time when location sharing ends. In some embodiments, an indication of location sharing includes text, such as “Location Sharing Turned On” or “You Can View [first participant&#39;s] Location.” 
     In some embodiments, the text associated with the indication of location sharing is displayed adjacent to a map within a bounded message region. In other embodiments, the text is not contained within a bounded message region. The text is optionally displayed below the most recent message received from the participant sharing the location information and aligned to that message, for example. In some embodiments, the text is displayed such that it is horizontally centered within the transcript and vertically positioned between messages in the conversation. 
     When one of the first participant and the second participant interact with the message conversation during the predetermined location-sharing time period, the predetermined location-sharing time period is optionally extended to end at a second time that is after the first time.  FIG.  6 C  illustrates message transcript  602  after the second participant has sent a new message  618  after the first participant&#39;s request to share location information (illustrated in  FIG.  6 A ). In response to the second participant&#39;s interaction with the message conversation, the predetermined location-sharing time period is extended, as depicted by the second end time  620  below the map. In  FIG.  6 C , the predetermined location-sharing time period has been extended by 15 minutes (from 1:01 PM to 1:16 PM). In some embodiments, the period is extended by 5 minutes, 10 minutes, 20 minutes, 30 minutes, and so forth. 
     Advantageously, this allows users to continue sharing location during a single conversation but ends location sharing after the conversation has ended to preserve privacy without requiring a user to explicitly indicate that the conversation has ended. At the same time, in embodiments in which a participant&#39;s location is updated periodically, users receive up-to-date location information for one or more participants, which may be preferable to static location information. This also improves the user&#39;s experience when the user is not required to remember to stop sharing indefinitely-shared location information when first participant information is no longer necessary for the second participant. The user is also not required to repeatedly share one-off location information when first participant information is necessary for the second participant. This reduces battery usage as users are not required to repeatedly access and select location-sharing via the user interface. 
     In some embodiments, the predetermined location-sharing time period is extended only when one of the participants adds content to the conversation (e.g., by sending a new message). In some embodiments, the extended time period is shorter than the predetermined location-sharing time period. In the examples displayed in  FIGS.  6 A- 6 H , the predetermined location-sharing time period is two hours and each extension is 15 minutes. In some embodiments, different location-sharing time periods and different extensions are used. 
     In some embodiments, the location-sharing time period is further extended after one of the first and second participant interacts with the message conversation during the already extended location-sharing time period.  FIG.  6 D  illustrates message transcript  602  after the first participant has sent a new message  622  after the location-sharing time period has been extended (illustrated in  FIG.  6 C ) to share location information. In response to the first participant&#39;s interaction with the message conversation, the predetermined location-sharing time period is extended, as depicted by the second end time  624  below the map. 
     The process of further extending the location-sharing time period is optionally repeated any number of times. This optionally allows users to continue sharing location during a single conversation but ends location sharing after the conversation has ended to preserve privacy without requiring a user to explicitly indicate that the conversation has ended.  FIG.  6 E  illustrates the first participant adding a message  630  to the message conversation subsequent to second participant message  618  (see  FIG.  6 C ) and after the location-sharing time period has ended. In this embodiment, message  618  ( FIG.  6 C ) was added at 11:25 AM and the next message (message  630  sent by the first participant) was added at 1:31 PM, after the location-sharing time period ended at 1:16 PM (see  FIG.  6 C,  620   ). Because a participant interacts with the message conversation after the extended predetermined location-sharing time period has ended, the predetermined location-sharing time period is not extended. 
     Advantageously, this allows users to continue sharing location during a single conversation but ends location sharing after the conversation has ended to preserve privacy without requiring a user to explicitly indicate that the conversation has ended. This also improves the user&#39;s experience when the user is not required to remember to stop sharing indefinitely-shared location information when first participant information is no longer necessary for the second participant. The user is also not required to repeatedly share one-off location information when first participant information is necessary for the second participant. This reduces battery usage as users are not required to repeatedly access and select location-sharing via the user interface. 
     In some embodiments, device  600  determines whether or not to extend the location-sharing time period based on whether the interaction occurred after the location-sharing time period has ended. 
     In the embodiment of  FIG.  6 E , the ended location-sharing time period is depicted by shading a map  628 , displaying text  626 , and unshaded caret  632 . In embodiments where location sharing is indicated by a modified visual attribute of a sharing location affordance or an information bar, the device optionally discontinues the modification to indicate location sharing has ended. In some embodiments, an ended location-sharing time period is indicated with one of these attributes, with a combination of two or more of these attributes, or with other attributes. 
     In some embodiments, device  600  determines that the predetermined location-sharing time period has ended and, in response to the determination, displays an indication in the message conversation that the location of the first participant is not being shared with the second participant. In some embodiments, the indication includes a greyed out map (such as  628 ) or an empty caret (such as  632 ). In some embodiments, if an indication of a user&#39;s location was displayed in a message transcript when the user shared their location, redisplaying the portion of the transcript that includes the indication of the user&#39;s location still shows the previously displayed indication but its appearance is modified so as to indicate that the location information in the indication is stale (e.g., because the location-sharing time period had expired without being extended). 
     In some embodiments, a depiction, on device  600 , of an ended location-sharing time period is provided at the moment the time period ends. In some embodiments, a depiction, on device  600 , of an ended location-sharing time period is provided at the moment of the next interaction by one of the first participant and the second participant with the message conversation. 
     In some embodiments, interacting with the message conversation includes a participant viewing at least a portion of the message conversation and/or a participant adding a message to the message conversation. In some embodiments, a location-sharing time period is extended when an outside communication between the first and second participants is detected. Such outside communications optionally include a phone call or video call or other form of direct communication between the two participants outside of the message conversation. 
       FIG.  6 F  illustrates another option for ending a location-sharing time period. In the embodiment of  FIG.  6 F , the first participant selects the shared-location affordance  616  before the location-sharing time period has expired, which ends location sharing, as shown in  FIG.  6 G . 
     In some embodiments, second participant location information is automatically shared when the first participant requests to share information.  FIG.  6 H  illustrates a message transcript after the first participant requested (see, e.g.,  FIG.  6 A ) to share location information. A map  638  of the second participant&#39;s location is received and displayed. In some embodiments, a request is transmitted for second participant location information (see, e.g.,  FIG.  8 B ). 
     In some embodiments, a location-sharing instruction is transmitted to an external device, wherein the location-sharing instruction permits the external device to share first participant location information with the second participant. For example, where an application tracks the first participant&#39;s location (e.g., Maps, location sharing applications, etc.), a server associated with that application is instructed to provide the first participant&#39;s location information. In some embodiments, the first participant location information is transmitted to an external device, such as a personal electronic device of the second participant. 
     In some embodiments, first participant location information is a location of device  600 . In some embodiments, the first participant has multiple devices and first participant location information is the device that is determined to be most representative of the first participant&#39;s location. In such an embodiment, device  600  determines whether device  600  is representative of the first participant&#39;s location. If device  600  determines that it is representative of the first participant&#39;s location, a location of the device is transmitted. If device  600  determines that it is not representative of the first participant&#39;s location, a location of the device is not transmitted. 
     In some embodiments, location-sharing is extended only when a message interaction occurs within a window at the end of current location-sharing time period. For example, only interactions within the last fifteen minutes of a two-hour location-sharing time period extend the location-sharing time period. An interaction within the two-hour location-sharing time period but before the last fifteen minutes does not extend the location-sharing time period. 
     In some embodiments, a buffer time is provided after the location-sharing time period for extending location sharing. For example, if device  600  detects interaction with the message conversation after first participant location information sharing has stopped and device  600  determines that less than a buffer time period has elapsed since the time first participant location information sharing was stopped, device  600  re-enables the second participant to obtain the first participant location information. In some embodiments, device  600  re-enables only when the location-sharing time period expired and not when the first participant actively ends location-sharing (see, e.g.,  FIG.  6 F ). In some embodiments, the first participant is notified that the second participant has been re-enabled to obtain the first participant location information. 
     In some embodiments, a message conversation includes a third participant. Upon receiving a request from the first participant to share location information with the third participant, device  600  enables both the second and third participants to obtain first participant location information during a predetermined location-sharing time period. In some embodiments, the location-sharing request to share the first participant&#39;s location with the third participant is the same as the location-sharing request to share the first participant&#39;s location with the second participant (e.g., a single location-sharing request to share location in the message conversation causes the first participant&#39;s location to be shared with multiple other participants in the conversation or, optionally, all other participants in the conversation). 
       FIG.  7 A  is a flow diagram illustrating process  700  for sharing a message participant&#39;s location information using an electronic device in accordance with some embodiments. Process  700  is performed at an electronic device (e.g., device  100 ,  300 ,  500 ) with a display and a touch-sensitive surface. Some operations in process  700  are optionally combined, the order of some operations is optionally changed, and some operations are optionally omitted. 
     As described below, process  700  provides an intuitive way for sharing location information. The method reduces the cognitive burden on a user for sharing location information, thereby creating a more efficient human-machine interface. For battery-operated computing devices, enabling a user to share location information faster and more efficiently conserves power and increases the time between battery charges. 
     At block  702 , the device displays, on the display, a message region (e.g., message region  602  in  FIG.  6 A ) with messages sent (e.g., messages  606  and  608  in  FIG.  6 A ) between a first participant and a second participant in a message conversation. At block  704 , the device detects a location-sharing request from the first participant to share first participant location information with the second participant (e.g., detecting selection of affordance  610 ). In response to detecting the location-sharing request from the first participant, at block  706  the device enables the second participant to obtain the first participant location information during a predetermined location-sharing time period that is scheduled to end at a first time (e.g., enabling location sharing until scheduled end  614  below map  612  in  FIG.  6 B ). At block  708 , the device detects interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period (e.g., additional message  618  in  FIG.  6 C ). In response to detecting interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period, at block  710  the device extends the predetermined location-sharing time period to end at a second time that is after the first time (e.g., second end time  620  is 15 minutes later than first end time  614  in  FIGS.  6 C and  6 B , respectively). 
     Advantageously, this allows users to continue sharing location during a single conversation but ends location sharing after the conversation has ended to preserve privacy without requiring a user to explicitly indicate that the conversation has ended. This also improves the user&#39;s experience when the user is not required to remember to stop sharing indefinitely-shared location information when first participant information is no longer necessary for the second participant. The user is also not required to repeatedly share one-off location information when first participant information is necessary for the second participant. This reduces battery usage as users are not required to repeatedly access and select location-sharing via the user interface. 
       FIGS.  7 B and  7 C  are flow diagrams illustrating sub-processes  720  and  726  which are optionally performed after block  710  and during process  700  ( FIG.  7 A ). In some embodiments, one or more of optional blocks  722 - 724  illustrated in  FIG.  7 B  are performed after block  710  ( FIG.  7 A ). At block  722 , the device detects interaction by one of the first participant and the second participant with the message conversation during the extended location-sharing time period (e.g., typing of additional message  622  in  FIG.  6 D ). In response to detecting interaction by one of the first participant and the second participant with the message conversation during the extended location-sharing time period, the device at block  724  further extends the predetermined location-sharing time period to end at a third time that is after the second time (e.g., enabling location sharing until scheduled end  624  in  FIG.  6 D ). The process of further extending the location-sharing time period is, optionally, repeated any number of times. This enables users to continue sharing location during a single conversation but ends location sharing after the conversation has ended to preserve privacy without requiring a user to explicitly indicate that the conversation has ended. 
     Turning to  FIG.  7 C , in some embodiments one or more of optional blocks  728 - 730  illustrated in  FIG.  7 C  are performed after block  710  ( FIG.  7 A ). At block  728 , the device detects interaction by one of the first participant and the second participant with the message conversation after the extended predetermined location-sharing time period (e.g., receiving new message  630  in  FIG.  6 E ). In response to detecting interaction by one of the first participant and the second participant with the message conversation after the extended predetermined location-sharing time period, the device at block  730  forgoes further extending the predetermined location-sharing time period (e.g., does not extend the location sharing to a new time such as new time  624  in  FIG.  6 D ). Because a participant interacts with the message conversation after the extended predetermined location-sharing time period has ended, the predetermined location-sharing time period is not extended. Advantageously, this allows users to continuously share location during a single conversation but ends location sharing after the conversation has ended to preserve privacy without requiring a user to explicitly indicate that the conversation has ended. This also improves the user&#39;s experience when the user is not required to remember to stop sharing indefinitely-shared location information when first participant information is no longer necessary for the second participant. The user is also not required to repeatedly share one-off location information when first participant information is necessary for the second participant. This also reduces battery usage, as users are not required to repeatedly access and select location-sharing. 
     In some embodiments, detecting interaction by one of the first participant and the second participant with the message conversation comprises detecting at least one criteria selected from the group consisting of: the first participant viewing at least a portion of the message conversation (e.g., viewing message region  602 ), the second participant viewing at least a portion of the message conversation, the first participant adding a message to the message conversation (e.g., adding message  622 ), and the second participant adding a message to the message conversation (e.g., adding message  618 ). 
       FIG.  7 D  is a flow diagram illustrating sub-process  732  which is optionally performed during process  700  ( FIG.  7 A ). In some embodiments, blocks  734 - 736  are performed instead of blocks  708 - 710 . In some embodiments, blocks  734 - 736  are performed after block  710 . In some embodiments, blocks  734 - 736  are performed before block  710 . At block  734 , the device detects a communication between the first and second participant outside of the message conversation during the predetermined location-sharing time period. Such outside communications optionally include a phone call or video call (e.g., a phone or video call, received on device  600 , from a device of the second participant) or other form of direct communication between the two participants outside of the message conversation. In response to detecting a communication between the first and second participant outside of the message conversation during the predetermined location-sharing time period, the device at block  736  extends the predetermined location-sharing time period (e.g., extends time  624  to a new time later than 1:31 pm). 
     In some embodiments, the device displays an indication (e.g., modifying a visual attribute of a caret  616 , an information bar  614 , a map  612 , or any other indication described herein) in the message conversation that the location of the first participant is being shared with the second participant. In some embodiments, when the location-sharing time period ends (e.g., without being extended), the device ceases to display the indication. In some embodiments, the indication is a map view (e.g., map view  614  in  FIG.  6 B ). In some embodiments, the map-view is displayed behind an image of the first participant. In some embodiments, the map-view is displayed between two messages (e.g., messages  608  and  618  in  FIG.  6 C ) of the message conversation. In some embodiments, the indication is a map view (e.g., map view  614  in  FIG.  6 B ) and the device updates the map view (e.g., map view  620  in  FIG.  6 C ) when the first participant location information changes. In some embodiments, the indication includes one or more of a location-sharing status (e.g., text “sharing location until 1:01 pm” in  614  in  FIG.  6 B ), the first time (e.g., text “1:01 pm” in  614  in  FIG.  6 B ), the second time (e.g., text “1:16 pm” in  620  in  FIG.  6 C ), a current address of the first participant, a travel time between the first participant and the second participant, and a distance between the first participant and the second participant. 
     In some embodiments, the indication is a shared-location affordance (e.g., shared location affordance  616  in  FIG.  6 F ).  FIG.  7 E  is a flow diagram illustrating sub-process  738  which is optionally performed during process  700  ( FIG.  7 A ) when the device displays a shared-location affordance. At block  740 , the device detects a selection of the shared-location affordance by the first participant (e.g., selection of caret  616  in  FIG.  6 F ). In response to detecting the selection of the shared-location affordance by the first participant, the device at block  742  ends the predetermined location-sharing time period (e.g., as represented by empty caret  632  in  FIG.  6 G ). 
       FIG.  7 F  is a flow diagram illustrating sub-process  744 , which is optionally performed during process  700  ( FIG.  7 A ). At block  746 , the device determines that the predetermined location-sharing time period has ended (e.g., determines second time  620  in  FIG.  6 C  has passed). In accordance with the determination that the predetermined location-sharing time period has ended, the device displays at block  748  an indication (e.g., grey out map  628 , empty navigation caret  632 , and text  620  in  FIG.  6 E ) in the message conversation that the location of the first participant is not being shared with the second participant. In some embodiments, if an indication of a user&#39;s location was displayed in a message transcript when the user shared their location, redisplaying the portion of the transcript that includes the indication of the user&#39;s location still shows the previously displayed indication but its appearance is modified so as to indicate that the location information in the indication is stale (e.g., because the location-sharing time period had expired without being extended). 
       FIG.  7 G  is a flow diagram illustrating sub-process  750  which is optionally performed during block  706  of process  700  ( FIG.  7 A ). At block  752 , the device receives second participant location information. At block  754 , the device displays (e.g., map  638  in  FIG.  6 H ) the second participant location information. In this embodiment, the device automatically shares second participant location information with the first participant after the first participant enables sharing of first participant location information. In some embodiments, location sharing is unilateral (e.g., second participant location information is not automatically shared with the first participant after the first participant enables sharing of first participant location information). In some such embodiments, the device transmits a request for second participant location information. 
       FIG.  7 H  is a flow diagram illustrating sub-process  760  which is optionally performed during process  700  ( FIG.  7 A ). At block  762 , the device determines whether the electronic device is representative of the first participant&#39;s location (e.g., device  600  is determined to be in possession of the first participant). In some embodiments, the device determines whether it is representative of the first participant&#39;s location. In accordance with a determination that the electronic device is representative of the first participant&#39;s location, the device at block  764  transmits a location of the electronic device (e.g., transmits the location illustrated in map view  612  of  FIG.  6 B ). In accordance with a determination that the electronic device is not representative of the first participant&#39;s location, the device at block  766  forgoes transmitting a location of the electronic device (e.g., does not transmit the location in map view  612  of  FIG.  6 B ). 
       FIG.  7 I  is a flow diagram illustrating sub-process  770 , which is optionally performed after the second time described above in process  700  ( FIG.  7 A ). At block  772 , the device ceases enabling the second participant to obtain the first participant location information (e.g., device  600  does not transmit an updated location). At block  774 , the device detects interaction by one of the first participant and the second participant with the message conversation (e.g., new message  630  in  FIG.  6 E ). In response to detecting interaction by one of the first participant and the second participant with the message conversation after the second time, the device at block  776  determines whether less than a buffer time period has elapsed since the second time (e.g., within 5 minutes of second time  620 ). In accordance with a determination that less than a buffer time period has elapsed since the second time, the device at block  778  re-enables the second participant to obtain the first participant location information (e.g., enabling location sharing until an end time after second time  620 ). In some embodiments, the first participant is notified that the second participant has been re-enabled to obtain the first participant location information. In accordance with a determination that more than the buffer time period has elapsed since the second time, the device at block  780 , displays the message conversation without re-enabling the second participant to obtain the first participant location information. 
       FIG.  7 J  is a flow diagram illustrating sub-process  790  which is optionally performed during process  700  ( FIG.  7 A ) when the conversation includes a third participant. At block  792 , the device displays messages sent between the first participant, the second participant, and a third participant in the message conversation. At block  794 , the device detects a location-sharing request from the first participant to share first participant location information with the third participant. In some embodiments, the location-sharing request to share the first participant&#39;s location with the third participant is the same as the location-sharing request to share the first participant&#39;s location with the second participant (e.g., a single location-sharing request to share location in the message conversation causes the first participant&#39;s location to be shared with multiple other participants in the conversation or, optionally, all other participants in the conversation). In response to detecting the location-sharing request from the first participant to share first participant location information with the third participant, the device at block  796  enables the second and third participants to obtain the first participant location information during a second predetermined location-sharing time period. 
     In some embodiments, the extended time period is shorter than the predetermined location-sharing time period. In some embodiments, the predetermined location-sharing time period is two hours and each extension is 15 minutes. In some embodiments, different location-sharing time periods and different extensions are used. 
     In some embodiments, a location-sharing instruction is received from an external device, wherein the location-sharing instruction permits the external device to share first participant location information with the second participant. For example, where an application tracks the first participant&#39;s location (e.g., Maps, location sharing applications, etc.), a server associated with that application is instructed to provide the first participant&#39;s location information. In some embodiments, the first participant location information is received from an external device, such as a mobile phone of the first participant. In some embodiments, first participant location information is a location of a device of the first participant. 
     Note that details of the processes described above with respect to process  700  (e.g.,  FIGS.  7 A- 7 J ) are also applicable in an analogous manner to the processes described herein. For example, processes  900 ,  1200 ,  1500 ,  1800 , and  2000  optionally include one or more of the characteristics of the various processes described above with reference to process  700 . For example, extending block  710  is optionally incorporated in any of processes  900 ,  1200 ,  1500 ,  1800 , and/or  2000 . Additionally, the conversations, location sharing affordances, shared location affordances, location-sharing time periods, participants, participant location information, location sharing extensions, interactions with a message conversation, communications outside a message conversation, and indications described above with reference to process  700 , or sub-processes  720 ,  726 ,  732 ,  738 ,  744 ,  750 ,  760 ,  770 , and/or  790 , optionally share some or all of the characteristics with the conversations, location sharing affordances, shared location affordances, location-sharing time periods, participants, participant location information, location sharing extensions, interactions with a message conversation, communications outside a message conversation, and indications described with reference to processes  900 ,  1200 ,  1500 ,  1800 , and/or  2000 , or sub-processes  1220 ,  1230 ,  1240 ,  1250 ,  1260 ,  1270 ,  1280 ,  1520 ,  1530 ,  1540 ,  1810 ,  1820 ,  1830 ,  1840 ,  2010 , and/or  2020 . For brevity, these details are not repeated in the descriptions of the other processes. The various methods and techniques described above with reference to method  700 , or sub-processes  720 ,  726 ,  732 ,  738 ,  744 ,  750 ,  760 ,  770 , and/or  790 , are optionally implemented as one or more units, such as those described with regard to  FIG.  10   . 
       FIG.  8 A  illustrates an exemplary message user interface that is optionally displayed by a device of the second participant in the message conversation between the first and second participant described above with respect to  FIGS.  6 A- 6 H . The message user interface includes a message region  802  for displaying messages sent  806  and  808  between the first participant and the second participant. The message user interface also includes a banner  804  including the name of the first participant and a current time of day. Messages sent between the participants are displayed inside bounded message areas. The message user interface also includes a location-sharing affordance  810 . 
     When the first participant requests to share location information ( FIG.  6 A ), device  800  receives a location-sharing notification that first participant location information is being shared for a predetermined location-sharing time period. In the embodiment of  FIG.  8 A , device  800  displays a map  812  and an information bar  814 .  814  includes a location of the first participant and a travel time between the first and second participants. In some embodiments, the information bar includes only one of the location and the travel time. In some embodiments, the information bar alternates between a display of a location of the first participant and a travel time between the first and second participants. 
     Map  812  is displayed in the message transcript between two messages; in some embodiments, the map view is displayed above the transcript, in the banner for example, or below the transcript above a keyboard. In some embodiments, the map view is displayed behind an image (photo, avatar, etc.) of the participant currently sharing information. In some embodiments, the location of a message participant is updated over time (e.g., as the user moves around) and the device displays an updated map view as the participant&#39;s location information changes. In some embodiments, an indication of location sharing includes a location-sharing status, a current address of the first participant, a travel time between the first participant and the second participant, a distance between the first participant and the second participant, and a time when location sharing ends. 
     In some embodiments, the scheduled end of the predetermined location-sharing time period could also be displayed on device  800 . 
     When one of the first participant and the second participant interact with the message conversation during the predetermined location-sharing time period, the predetermined location-sharing time period is extended to end at a second time that is after the first time. For example, if a message is sent from device  800  to device  600 , the predetermined location-sharing time period is extended to end at a second time. Device  800  receives a second location-sharing notification that first participant location information is being shared for an extended location-sharing time period. 
     In some embodiments, the predetermined location-sharing time period is extended only when one of the participants adds content to the conversation (e.g., by sending a new message). In some embodiments, the extended time period is shorter than the predetermined location-sharing time period. 
     In some embodiments, the location-sharing time period is further extended after the second participant interacts with the message conversation during the already extended location-sharing time period. In response, a notification of the second participant&#39;s interaction is sent from device  800  to device  600 . After sending this notification, device  800  receives a notification that the extended location-sharing time period is further extended. 
     The process of further extending the location-sharing time period is optionally repeated any number of times. This optionally allows users to continue sharing location during a single conversation but ends location sharing after the conversation has ended to preserve privacy without requiring a user to explicitly indicate that the conversation has ended. In some embodiments, if the second participant interacts with the message conversation after the extended predetermined location-sharing time period has ended, the predetermined location-sharing time period is not extended. Advantageously, this allows users to continue sharing location during a single conversation but ends location sharing after the conversation has ended to preserve privacy without requiring a user to explicitly indicate that the conversation has ended. This also improves the user&#39;s experience when the user is not required to remember to stop sharing indefinitely-shared location information when first participant information is no longer necessary for the second participant. The user is also not required to repeatedly share one-off location information when first participant information is necessary for the second participant. This reduces battery usage as users are not required to repeatedly access and select location-sharing via the user interface. 
     In some embodiments, an ended location-sharing time period is depicted by shading a map, displaying text, and/or displaying a symbol. In such embodiments, device  800  determines that the predetermined location-sharing time period has ended and, in response to the determination, displays an indication in the message conversation that the location of the first participant is not being shared with the second participant. In some embodiments, if an indication of a user&#39;s location was displayed in a message transcript when the user shared their location, redisplaying the portion of the transcript that includes the indication of the user&#39;s location would still show the previously displayed indication but it&#39;s appearance would be modified so as to indicate that the location information in the indication is stale (e.g., because the location-sharing time period had expired without being extended). 
     In some embodiments, a depiction, on device  800 , of an ended location-sharing time period is provided at the moment the time period ends. In some embodiments, a depiction, on device  800 , of an ended location-sharing time period is provided at the moment of the next interaction by one of the first participant and the second participant with the message conversation. 
       FIG.  8 B  illustrates an exemplary message user interface after device  800  receives a notification of first location-sharing. In response to receiving the notification, device  800  displays a request  816  for second participant location information. In some embodiments, second participant location information is automatically shared when the first participant requests to share information. In such embodiments, when a notification of first location-sharing is received, device  800  shares second participant location information with the first participant. 
     In some embodiments, a location-sharing instruction is received from an external device, wherein the location-sharing instruction permits the external device to share first participant location information with the second participant. For example, where an application tracks the first participant&#39;s location (e.g., Maps, location sharing applications, etc.), a server associated with that application is instructed to provide the first participant&#39;s location information. In some embodiments, the first participant location information is received from an external device, such as a mobile phone of the first participant. In some embodiments, first participant location information is a location of a device of the first participant. 
       FIG.  9    is a flow diagram illustrating process  900  for sharing a message participant&#39;s location information using an electronic device in accordance with some embodiments. Process  900  is performed at an electronic device (e.g., device  100 ,  300 ,  500 ) with a display and a touch-sensitive surface. Some operations in process  900  are optionally combined, the order of some operations is optionally changed, and some operations are optionally omitted. 
     As described below, process  900  provides an intuitive way for sharing location information. The method reduces the cognitive burden on a user for sharing location information, thereby creating a more efficient human-machine interface. For battery-operated computing devices, enabling a user to share location information faster and more efficiently conserves power and increases the time between battery charges. 
     At block  902 , the device displays, on the display, a message region (e.g., message region  802  in  FIG.  8 A ) with messages sent (e.g., messages  806  and  808  in  FIG.  8 A ) between a first participant and a second participant in a message conversation. At block  904 , the device receives a first location-sharing notification that first participant location information is being shared with the second participant for a predetermined location-sharing time period that is scheduled to end at a first time (e.g., enabling location sharing until scheduled end  614  below map  612  in  FIG.  6 B ). At block  906 , the device sends a message to the first participant (e.g., message  618  in  FIG.  6 C ). At block  908 , the device receives a second location-sharing notification that first participant location information is being shared with the second participant for an extended location-sharing time period that is scheduled to end at a second time that is after the first time (e.g., text  620  illustrating second end time “1:16 PM” in  FIG.  6 C ). 
     Advantageously, this allows users to continue sharing location during a single conversation but ends location sharing after the conversation has ended to preserve privacy without requiring a user to explicitly indicate that the conversation has ended. This also improves the user&#39;s experience when the user is not required to remember to stop sharing indefinitely-shared location information when first participant information is no longer necessary for the second participant. The user is also not required to repeatedly share one-off location information when first participant information is necessary for the second participant. This reduces battery usage as users are not required to repeatedly access and select location-sharing via the user interface. 
     In some embodiments, process  900  includes: detecting interaction by the second participant with the message conversation during the extended location-sharing time period and, in response to detecting interaction by the second participant with the message conversation during the extended location-sharing time period, sending a notification to the first participant; and, after sending the notification to the first participant, receiving a notification that extended location-sharing time period is further extended to end at a third time that is after the second time. 
     In some embodiments, process  900  includes detecting interaction by the second participant with the message conversation after the extended location-sharing time period and, in response to detecting interaction by the second participant with the message conversation after the extended location-sharing time period, forgoing sending a notification to the first participant. 
     In some embodiments, process  900  includes detecting interaction by the second participant with the message conversation comprises detecting at least one criteria selected from the group consisting of: the first participant viewing at least a portion of the message conversation, the second participant viewing at least a portion of the message conversation (e.g., viewing message region  802 ), the first participant adding a message to the message conversation, and the second participant adding a message to the message conversation. 
     In some embodiments, process  900  includes displaying an indication (e.g., map view  812  and text  814  in  FIG.  8 A ) in the message conversation that the location of the first participant is being shared with the second participant. In some embodiments, the indication comprises a map-view (e.g., map view  812  in  FIG.  8 A ). In some embodiments, the map-view is displayed behind an image of the first participant. In some embodiments, the map-view is displayed between two messages of the message conversation. 
     In some embodiments, process  900  includes receiving updated first participant location information and updating the map view with the updated first participant location information. In some embodiments, the indication comprises one or more of a location-sharing status, the first time, the second time, a current address of the first participant (e.g., address “Palo Alto” in information bar  814  in  FIG.  8 A ), a travel time between the first participant and the second participant (e.g., travel time “35 MINS” in information bar  814  in  FIG.  8 A ), and a distance between the first participant and the second participant. 
     In some embodiments, process  900  includes determining that the predetermined location-sharing time period has ended and, in accordance with a determination that the predetermined location-sharing time period has ended, displaying an indication in the message conversation that the location of the first participant is not being shared with the second participant. 
     In some embodiments, the extended predetermined location-sharing time period is shorter than the predetermined location-sharing time period. 
     In some embodiments, process  900  includes, further in response to receiving the first location-sharing notification, sharing second participant location information with the first participant. 
     In some embodiments, process  900  includes, further in response to receiving the first location-sharing notification, displaying a request (e.g., request  816  in  FIG.  8 B ) to share second participant location information with the first participant. 
     In some embodiments, process  900  includes receiving the first location-sharing notification comprises receiving first participant location information from an external device. In some embodiments, receiving the first location-sharing notification comprises receiving the first participant location information from an electronic device of the first participant. 
     In some embodiments, first participant location information comprises a location of the electronic device of the first participant. 
     Note that details of the processes described above with respect to process  900  (e.g.,  FIG.  9   ) are also applicable in an analogous manner to the processes described herein. For example, processes  700 ,  1200 ,  1500 ,  1800 , and  2000  optionally include one or more of the characteristics of the various processes described above with reference to process  900 . For example, sending block  906  is optionally incorporated in any of processes  700 ,  1200 ,  1500 ,  1800 , and/or  2000 . Additionally, the conversations, location sharing affordances, shared location affordances, location-sharing time periods, participants, participant location information, location sharing extensions, interactions with a message conversation, communications outside a message conversation, and indications described above with reference to process  900  optionally share some or all of the characteristics with the conversations, location sharing affordances, shared location affordances, location-sharing time periods, participants, participant location information, location sharing extensions, interactions with a message conversation, communications outside a message conversation, and indications described with reference to processes  700 ,  1200 ,  1500 ,  1800 , and/or  2000 . For brevity, these details are not repeated in the descriptions of the other processes. The various methods and techniques described above with reference to method  900  are optionally implemented as one or more units, such as those described with regard to  FIG.  10   . 
     In accordance with some embodiments,  FIG.  10    shows an exemplary functional block diagram of an electronic device  1000  configured in accordance with the principles of the various described embodiments. In accordance with some embodiments, the functional blocks of electronic device  1000  are configured to perform the techniques described above. The functional blocks of the device  1000  are, optionally, implemented by hardware, software, or a combination of hardware and software to carry out the principles of the various described examples. It is understood by persons of skill in the art that the functional blocks described in  FIG.  10    are, optionally, combined or separated into sub-blocks to implement the principles of the various described examples. Therefore, the description herein optionally supports any possible combination or separation or further definition of the functional blocks described herein. 
     As shown in  FIG.  10   , an electronic device  1000  includes a display unit  1002  configured to display a graphic user interface, optionally, a touch-sensitive surface unit  1004  configured to receive contacts, and a processing unit  1006  coupled to the display unit  1002  and, optionally, the touch-sensitive surface unit  1004 . In some embodiments, the processing unit  1006  includes a detecting unit  1008 , a determining unit  1010 , an enabling unit  1012 , an extending unit  1014 , an ending unit  1016 , a receiving unit  1018 , a transmitting unit  1020 , an updating unit  1022 , a sharing unit  1024 , a sending unit  1026 , and a display enabling unit  1028 . 
     The processing unit  1006  is configured to: enable display (e.g., with display enabling unit  1028 ), on display unit  1002 , of a message region; enable display (e.g., with display enabling unit  1028 ), in the message region, of messages sent between a first participant and a second participant in a message conversation; detect (e.g., with detecting unit  1008 ) a location-sharing request from the first participant to share first participant location information with the second participant; in response to detecting the location-sharing request from the first participant: enable (e.g., with enabling unit  1012 ) the second participant to obtain the first participant location information during a predetermined location-sharing time period, wherein the predetermined location-sharing time period is scheduled to end at a first time; detect (e.g., with detecting unit  1008 ) interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period; and in response to detecting interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period: extend (e.g., with extending unit  1014 ) the predetermined location-sharing time period to end at a second time that is after the first time. 
     In some embodiments, the processing unit is further configured to: detect (e.g., with detecting unit  1008 ) interaction by one of the first participant and the second participant with the message conversation during the extended location-sharing time period; and in response to detecting interaction by one of the first participant and the second participant with the message conversation during the extended location-sharing time period: further extend (e.g., with extending unit  1014 ) the predetermined location-sharing time period to end at a third time that is after the second time. 
     In some embodiments, the processing unit is further configured to: detect (e.g., with detecting unit  1008 ) interaction by one of the first participant and the second participant with the message conversation after the extended predetermined location-sharing time period; and in response to detecting interaction by one of the first participant and the second participant with the message conversation after the extended predetermined location-sharing time period: forgo further extending (e.g., with extending unit  1014 ) the predetermined location-sharing time period. 
     In some embodiments, an interaction by one of the first participant and the second participant with the message conversation comprises at least one criteria selected from the group consisting of: the first participant viewing at least a portion of the message conversation, the second participant viewing at least a portion of the message conversation, the first participant adding a message to the message conversation, and the second participant adding a message to the message conversation. 
     In some embodiments, the processing unit is further configured to: detect (e.g., with detecting unit  1008 ) a communication between the first and second participant outside of the message conversation during the predetermined location-sharing time period; and in response to detecting a communication between the first and second participant outside of the message conversation during the predetermined location-sharing time period: extend (e.g., with extending unit  1014 ) the predetermined location-sharing time period. 
     In some embodiments, the processing unit is further configured to: enable display (e.g., with display enabling unit  1028 ), on the display unit  1002 , of an indication in the message conversation that the location of the first participant is being shared with the second participant. In some embodiments, the indication comprises a map-view. In some embodiments, the map-view is displayed behind an image of the first participant. In some embodiments, the map-view is displayed between two messages of the message conversation. 
     In some embodiments, the processing unit is further configured to update (e.g., with updating unit  1022 ) the map view when the first participant location information changes. 
     In some embodiments, the indication comprises one or more of a location-sharing status, the first time, the second time, a current address of the first participant, a travel time between the first participant and the second participant, and a distance between the first participant and the second participant. In some embodiments, the indication is a shared-location affordance, and the processing unit is further configured to: detect (e.g., with detecting unit  1008 ) a selection of the shared-location affordance by the first participant; and in response to detecting the selection of the shared-location affordance by the first participant: end (e.g., with ending unit  1016 ) the predetermined location-sharing time period. 
     In some embodiments, the processing unit is further configured to: determine (e.g., with determining unit  1010 ) that the predetermined location-sharing time period has ended; and in accordance with a determination that the predetermined location-sharing time period has ended: enable display (e.g., with display enabling unit  1028 ), on the display unit  1002 , of an indication in the message conversation that the location of the first participant is not being shared with the second participant. 
     In some embodiments, extending the predetermined location-sharing time period to end at a second time that is after the first time comprises extending the predetermined location-sharing time period for an amount of time that is shorter than the predetermined location-sharing time period. 
     In some embodiments, the processing unit is further configured to: further in response to detecting the location-sharing request from the first participant: receive (e.g., with receiving unit  1018 ) second participant location information; and enable display (e.g., with enabling unit  1028 ), on the display unit  1002 , of the second participant location information. 
     In some embodiments, the processing unit is further configured to: further in response to detecting the location-sharing request from the first participant: transmit (e.g., with transmitting unit  1020 ) a request for second participant location information. 
     In some embodiments, enablement of the second participant to obtain the first participant location information during a predetermined location-sharing time period comprises transmission of a location-sharing instruction to an external device, and the location-sharing instruction permits the external device to share first participant location information with the second participant. 
     In some embodiments, enabling the second participant to obtain the first participant location information during a predetermined location-sharing time period comprises enabling the transmission of the first participant location information to an external device. 
     In some embodiments, the first participant location information comprises a location of the electronic device. 
     In some embodiments, the processing unit is further configured to: determine (e.g., with determining unit  1010 ) whether the electronic device is representative of the first participant&#39;s location; in accordance with a determination that the electronic device is representative of the first participant&#39;s location: transmit (e.g., with transmitting unit  1020 ) a location of the electronic device; and in accordance with a determination that the electronic device is not representative of the first participant&#39;s location: forgo transmitting (e.g., with transmitting unit  1020 ) a location of the electronic device. 
     In some embodiments, the processing unit is further configured to: after the second time: cease to enable (e.g., with enabling unit  1012 ) the second participant to obtain the first participant location information; and detect (e.g., with detecting unit  1008 ) interaction by one of the first participant and the second participant with the message conversation; and in response to detecting interaction by one of the first participant and the second participant with the message conversation after the second time: in accordance with a determination that less than a buffer time period has elapsed since the second time, re-enable (e.g., with enabling unit  1012 ) the second participant to obtain the first participant location information; and in accordance with a determination that more than the buffer time period has elapsed since the second time, enable (e.g., with enabling unit  1012 ) display, on the display unit  1002 , of the message conversation without re-enabling the second participant to obtain the first participant location information. 
     In some embodiments, the processing unit is further configured to: enable display (e.g., with display enabling unit  1028 ), in the message region, of messages sent between the first participant, the second participant, and a third participant in the message conversation; detect (e.g., with detecting unit  1008 ) a location-sharing request from the first participant to share first participant location information with the third participant; and in response to detecting the location-sharing request from the first participant to share first participant location information with the third participant: enable (e.g., with enabling unit  1012 ) the second and third participants to obtain the first participant location information during a second predetermined location-sharing time period. 
     The processing unit  1006  is configured to: enable display (e.g., with display enabling unit  1028 ), on the display unit  1002 , of a message region; enable display (e.g., with display enabling unit  1028 ), in the message region, messages sent between a first participant and a second participant in a message conversation; receive (e.g., with receiving unit  1018 ) a first location-sharing notification that first participant location information is being shared with the second participant for a predetermined location-sharing time period, wherein the predetermined location-sharing time period is scheduled to end at a first time; send (e.g., with sending unit  1026 ) a message to the first participant; and receive (e.g., with receiving unit  1018 ) a second location-sharing notification that first participant location information is being shared with the second participant for an extended location-sharing time period, wherein the extended location-sharing time period is scheduled to end at a second time that is after the first time. 
     In some embodiments, the processing unit is further configured to: detect (e.g., with detecting unit  1008 ) interaction by the second participant with the message conversation during the extended location-sharing time period; and in response to detecting interaction by the second participant with the message conversation during the extended location-sharing time period: send (e.g., with sending unit  1026 ) a notification to the first participant; and after sending the notification to the first participant, receive (e.g., with receiving unit  1018 ) a notification that extended location-sharing time period is further extended to end at a third time that is after the second time. 
     In some embodiments, the processing unit is further configured to: detect (e.g., with detecting unit  1008 ) interaction by the second participant with the message conversation after the extended location-sharing time period; and in response to detecting interaction by the second participant with the message conversation after the extended location-sharing time period: forgo sending (e.g., with sending unit  1026 ) a notification to the first participant. 
     In some embodiments, detecting interaction by the second participant with the message conversation comprises detecting at least one criteria selected from the group consisting of: the first participant viewing at least a portion of the message conversation, the second participant viewing at least a portion of the message conversation, the first participant adding a message to the message conversation, and the second participant adding a message to the message conversation. 
     In some embodiments, the processing unit is further configured to: enable display (e.g., with display enabling unit  1028 ), on the display unit  1002 , of an indication in the message conversation that the location of the first participant is being shared with the second participant. 
     In some embodiments, the indication comprises a map-view. In some embodiments, the map-view is displayed behind an image of the first participant. In some embodiments, the map-view is displayed between two messages of the message conversation. 
     In some embodiments, the processing unit is further configured to: receive (e.g., with receiving unit  1018 ) updated first participant location information; and update (e.g., with updating unit  1022 ) the map view with the updated first participant location information. 
     In some embodiments, the indication comprises one or more of a location-sharing status, the first time, the second time, a current address of the first participant, a travel time between the first participant and the second participant, and a distance between the first participant and the second participant. 
     In some embodiments, the processing unit is further configured to: determine (e.g., with detecting unit  1010 ) that the predetermined location-sharing time period has ended; and in accordance with a determination that the predetermined location-sharing time period has ended: enable display (e.g., with display enabling unit  1028 ), on the display unit  1002 , of an indication in the message conversation that the location of the first participant is not being shared with the second participant. 
     In some embodiments, the extended predetermined location-sharing time period is shorter than the predetermined location-sharing time period. 
     In some embodiments, the processing unit is further configured to: further in response to receiving the first location-sharing notification: share (e.g., with sharing unit  1024 ) second participant location information with the first participant. 
     In some embodiments, the processing unit is further configured to: further in response to receiving the first location-sharing notification: enable display (e.g., with display enabling unit  1028 ), on the display unit  1002 , of a request to share second participant location information with the first participant. 
     In some embodiments, receiving the first location-sharing notification comprises receiving first participant location information from an external device. 
     In some embodiments, receiving the first location-sharing notification comprises receiving the first participant location information from an electronic device of the first participant. 
     In some embodiments, first participant location information comprises a location of the electronic device of the first participant. 
     The operations described above with reference to  FIGS.  7 A- 7 J and  9    are, optionally, implemented by components depicted in  FIG.  1 A- 1 B,  3 ,  5 B , or  10 . For example, display operation  702 , detecting operation  704 , enabling operation  706 , detecting operation  708 , extending operation  710 , display operation  902 , receiving operation  904 , sending operation  906 , and receiving operation  908  is implemented by event sorter  170 , event recognizer  180 , and event handler  190 . Event monitor  171  in event sorter  170  detects a contact on touch-sensitive display  112 , and event dispatcher module  174  delivers the event information to application  136 - 1 . A respective event recognizer  180  of application  136 - 1  compares the event information to respective event definitions  186 , and determines whether a first contact at a first location on the touch-sensitive surface corresponds to a predefined event or sub event, such as activation of an affordance on a user interface. When a respective predefined event or sub-event is detected, event recognizer  180  activates an event handler  190  associated with the detection of the event or sub-event. Event handler  190  optionally utilizes or calls data updater  176  or object updater  177  to update the application internal state  192 . In some embodiments, event handler  190  accesses a respective GUI updater  178  to update what is displayed by the application. Similarly, it would be clear to a person having ordinary skill in the art how other processes can be implemented based on the components depicted in  FIG.  1 A- 1 B,  3 ,  5 B , or  10 . 
       FIG.  11 A  illustrates an exemplary message user interface that is optionally displayed by device  1100 . In some embodiments, the user interface is displayed on device  300  or device  500 . The message user interface includes a message region  1102  for displaying messages  1106  and  1108  sent between a first participant (the user of device  1100 ) and a second participant in a message conversation and for displaying a banner  1104  including the name of the second participant and a current time of day. Messages sent between the participants are displayed inside bounded message areas. A bottom portion of the message transcript is displayed at a first position in the message region  1102 . The message user interface also includes text message entry affordance  1110 . 
       FIG.  11 A  illustrates a user dragging up on the message transcript. As a result, device  1100  detects contact on a location corresponding to the message transcript and detects movement of contact across the touch-sensitive surface of device  1100  and toward a top portion of the message region  1102 . In response to detecting movement of the contact across the touch-sensitive surface and toward a top portion of the message region, device  1100  displays a location-sharing affordance  1112  at the first position in the message transcript (see  FIG.  11 B ). The bottom portion of the message transcript is now displayed at a second position above the first position. 
     Advantageously, this improves the user&#39;s experience because the user can quickly access location-sharing. This reduces battery usage as users are not required to make multiple selections on the user interface in order to activate location sharing. 
       FIG.  11 B  illustrates location-sharing affordance  1112  in a message user interface without a keyboard. Location-sharing affordance  1112  could also be displayed on a message user interface with a keyboard, as shown in  FIG.  11 D . The display of  FIG.  11 D  could be arrived at by performing a drag gesture (such as the drag gesture described above with respect to  FIG.  11 A ) on the message user interface of  FIG.  6 A . 
       FIG.  11 C  illustrates a user selecting text message entry affordance  1110 . In response, device  1100  displays a keyboard  1114  below the message region and displays location-sharing affordance  1112  at a third position above the first position ( FIG.  11 D ). In some embodiments, location-sharing affordance is no longer displayed when a user selects a text message entry affordance. 
       FIG.  11 E  illustrates message region  1102  after a new message is received at device  1100 . In response to receiving the new message, device  1100  displays the message at the bottom of the message transcript and ceases to display location-sharing affordance  1112 . In some embodiments, the new message is displayed above the location-sharing affordance in conjunction with displaying an animation of the location-sharing affordance sliding underneath the keyboard. In some embodiments, when a keyboard is not displayed and a new message arrives, the location-sharing affordance  1112  is no longer displayed. In some such embodiments, device  1100  displays an animation of the location-sharing affordance sliding underneath the text message entry affordance  1110 . 
       FIG.  11 F  illustrates a user selecting location-sharing affordance  1112 . In response to detecting a selection of the location-sharing affordance, device  1100  enables the second participant to obtain first participant location information during a predetermined location-sharing time period, wherein the predetermined location-sharing time period is scheduled to end at a first time. In the embodiment of  FIG.  11 G , first participant location information is shared via a map  1116  inserted in the message transcript of messages  1106  and  1108  sent between the first participant and second participant in the message conversation. An end time  1118  of the predetermined location-sharing time period is also displayed. 
     In like manner to other embodiments disclosed herein, in response to detecting interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period, device  1100  will extend the predetermined location-sharing time period (see description of  FIGS.  6 A- 6 H , for example). 
     As illustrated in  FIG.  11 G , location-sharing affordance  1112  is replaced by shared-location affordance  1120 . Shared-location affordance  1120  allows the first participant to end location sharing before the location-sharing time period has expired. 
     In some embodiments, shared-location affordance  1120  is continuously displayed while location information is shared. For example, while displaying shared-location affordance  1120 , device  1100  detects an event that will cause a change in appearance of the transcript (e.g., with the receipt of a new message or a scrolling operation that will scroll the message conversation downward). In response to detecting the event, device  1100  determines whether location-sharing is enabled. If location-sharing is enabled, device  1100  changes the appearance of the transcript in accordance with the event and maintains the display of shared-location affordance  1120 . If location-sharing is not enabled, device  1100  changes the appearance of the transcript in accordance with the event and ceases the display of shared-location affordance  1120 . 
     In some embodiments, location-sharing affordance  1112  is no longer displayed after a user interacts with it (e.g.,  FIG.  11 F ). Interaction with a location-sharing affordance includes, but is not limited to, activation or deactivation of location sharing based on a selection/deselection of the location-sharing affordance. 
     In some embodiments, device  1100  determines whether the movement of the contact ( FIG.  11 A ) across the touch-sensitive surface meets predefined criteria. The criteria is, for example, whether a speed, duration or length of the gesture comprises a speed, duration, or length below a predetermined threshold. If device  1100  determines that the movement meets the predefined criteria, device  1100  displays the location-sharing affordance for a predetermined time and discontinues the location-sharing affordance after the predetermined time period lapses. The predetermined time period is optionally short, on the order of one second, to allow the user to “peek” at the location-sharing affordance. If device  1100  determines that the movement does not meet the predefined criteria, device  1100  displays the location-sharing affordance. In some embodiments, the movement comprises a release of the contact and the predetermined criteria comprises a predetermined velocity of the movement at release. 
       FIG.  12 A  is a flow diagram illustrating process  1200  for sharing a message participant&#39;s location information using an electronic device in accordance with some embodiments. Process  1200  is performed at an electronic device (e.g., device  100 ,  300 ,  500 ) with a display and a touch-sensitive surface. Some operations in process  1200  are optionally combined, the order of some operations is optionally changed, and some operations are optionally omitted. 
     As described below, process  1200  provides an intuitive way for sharing location information. The method reduces the cognitive burden on a user for sharing location information, thereby creating a more efficient human-machine interface. For battery-operated computing devices, enabling a user to share location information faster and more efficiently conserves power and increases the time between battery charges. 
     At block  1202 , the device displays, on the display, a message region (e.g., message region  1102  in  FIG.  11 A ) and, at a first position in the message region, a bottom portion of a message transcript of messages sent (e.g., messages  1106  and  1108  in  FIG.  11 A ) between a first participant and a second participant of the message conversation. At block  1204 , the device detects contact on a location corresponding to the message transcript (e.g., contact by the finger illustrated in  FIG.  11 A ). At block  1206 , the device detects movement of the contact across the touch-sensitive surface and toward a top portion of the message region (e.g., movement of the finger in the direction of the arrow in  FIG.  11 A ). In response to detecting movement of the contact across the touch-sensitive surface and toward a top portion of the message region, at block  1208  the device displays the bottom portion of the message transcript at a second position in the message region above the first position (e.g., message  1108  is displayed at a higher position in the message transcript  1102  in  FIG.  11 B  then the position of message  1108  in  FIG.  11 A ). Also in response to detecting movement of the contact across the touch-sensitive surface and toward a top portion of the message region, at block  1210  the device displays a location-sharing affordance (e.g., location-sharing affordance  1112  in  FIG.  11 B ) at the first position. 
     Advantageously, this improves the user&#39;s experience because the user can quickly access location-sharing. This reduces battery usage as users are not required to make multiple selections on the user interface in order to activate location sharing. 
       FIG.  12 B  is a flow diagram illustrating sub-process  1220  which is optionally performed during process  1200  ( FIG.  12 A ). At block  1222 , the device displays a keyboard (e.g., keyboard  1114  in  FIG.  11 D ) below the message region. While displaying the location-sharing affordance at the first position, the device at block  1224  receives a new message for display in the message region (e.g., receipt of a message  1106  in  FIG.  11 E ). In response to receiving the new message, the device at block  1226  displays the new message in the message region (e.g., display of message  1106  in  FIG.  11 E ). Also in response to receiving the new message, the device at block  1228  ceases to display the location-sharing affordance (e.g., the device displays location-sharing affordance  1112  in  FIG.  11 D  and does not display a location-sharing affordance in  FIG.  11 E ). In some embodiments, the new message is displayed above the location-sharing affordance in conjunction with displaying an animation of the location-sharing affordance sliding underneath the keyboard. 
       FIG.  12 C  is a flow diagram illustrating sub-process  1230  which is optionally performed during process  1200  ( FIG.  12 A ). At block  1232 , the device detects a selection of the location-sharing affordance (e.g., selection of location sharing affordance  1112  in  FIG.  11 F ). In response to detecting a selection of the location-sharing affordance, the device at block  1234  enables the second participant to obtain the first participant location information during a predetermined location-sharing time period (e.g., by displaying map view  1116  in  FIG.  11 G ), wherein the predetermined location-sharing time period is scheduled to end at a first time (e.g., first time “1:01 PM” displayed in  FIG.  11 G ). 
       FIG.  12 D  is a flow diagram illustrating sub-process  1240  which is optionally performed during process  1200  ( FIG.  12 A ). At block  1242 , the device detects interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period (e.g., addition of a new message to message transcript  1102  in  FIG.  11 G ). In response to detecting interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period, the device at block  1244  extends the predetermined location-sharing time period to end at a second time that is after the first time (e.g., extending the location sharing time period to end at a time later than first time “1:01 PM” displayed in  FIG.  11 G ). 
       FIG.  12 E  is a flow diagram illustrating sub-process  1250  which is optionally performed during process  1200  ( FIG.  12 A ). At block  1252 , the device, while displaying the location-sharing affordance, detects an event that will cause a change in appearance of the transcript (e.g., with the receipt of a new message or a scrolling operation that will scroll the message conversation downward). In response to detecting an event that will cause a change in appearance of the transcript, the device at block  1254  determines whether the location-sharing is enabled (e.g., a location-sharing time period has not expired). In accordance with a determination that the location-sharing is enabled, the device at block  1256  changes the appearance of the transcript in accordance with the event and maintains display of a shared location affordance (e.g., shared-location affordance  1120  in  FIG.  11 G ). In accordance with a determination that the location-sharing is disabled, the device at block  1258  changes the appearance of the transcript in accordance with the event and ceases to display the location-sharing affordance. 
       FIG.  12 F  is a flow diagram illustrating sub-process  1260  which is optionally performed during process  1200  ( FIG.  12 A ). At block  1262 , the device receives a new message in the message conversation. In response to receiving the new message, the device at block  1264  displays a representation of the new message at the bottom portion of the transcript (e.g., display of message  1106  in  FIG.  11 E ). Also in response to receiving the new message, the device at block  1266  discontinues display of the location-sharing affordance (e.g., the device displays location sharing affordance  1112  in  FIG.  11 D  and does not display a location sharing affordance in  FIG.  11 E ). 
       FIG.  12 G  is a flow diagram illustrating sub-process  1270  which is optionally performed during process  1200  ( FIG.  12 A ). At block  1272 , the device detects interaction with the location-sharing affordance (e.g., selection of location-sharing affordance  1112  in  FIG.  11 F ). Interaction with a location-sharing affordance includes, but is not limited to, activation or deactivation of location sharing based on a selection/deselection of the location-sharing affordance. In response to detecting interaction with the location-sharing affordance, the device at block  1274  discontinues display of the location-sharing affordance (e.g., by replacing with shared-location affordance  1120 ). 
       FIG.  12 H  is a flow diagram illustrating sub-process  1280  which is optionally performed during process  1200  ( FIG.  12 A ). At block  1282 , the device determines whether the movement of the contact across the touch-sensitive surface meets predefined criteria. The criteria is, for example, whether a speed, duration or length of the gesture comprises a speed, duration, or length below a predetermined threshold. In some embodiments, the movement comprises a release of the contact and wherein the predetermined criteria comprises a predetermined velocity of the movement at release. In accordance with a determination that the movement meets the predetermined criteria, the device at block  1284  displays the location-sharing affordance for a predetermined time and discontinues display of the location-sharing affordance after the predetermined time lapses (e.g., the device displays location-sharing affordance  1112  in  FIG.  11 B  for the predetermined time). In accordance with a determination that the movement does not meet the predetermined criteria, the device at block  1286  displays the location-sharing affordance (e.g., the device displays location-sharing affordance  1112  in  FIG.  11 B  until the user interacts with it). 
     Note that details of the processes described above with respect to process  1200  (e.g.,  FIGS.  12 A- 12 H ) are also applicable in an analogous manner to the processes described herein. For example, processes  700 ,  900 ,  1500 ,  1800 , and  2000  optionally include one or more of the characteristics of the various processes described above with reference to process  1200 . For example, display block  1210  is optionally incorporated in any of processes  700 ,  900 ,  1500 ,  1800 , and/or  2000 . Additionally, the conversations, location sharing affordances, shared location affordances, location-sharing time periods, participants, participant location information, location sharing extensions, contact and movement detection, display of bottom portions of the message transcript, and display of keyboards described above with reference to process  1200 , or sub-processes  1220 ,  1230 ,  1240 ,  1250 ,  1260 ,  1270 , and  1280 , optionally share some or all of the characteristics with the conversations, location sharing affordances, shared location affordances, location-sharing time periods, participants, participant location information, location sharing extensions, contact and movement detection, display of bottom portions of the message transcript, and display of keyboards described with reference to processes  700 ,  900 ,  1500 ,  1800 , and/or  2000 , or sub-processes  720 ,  726 ,  732 ,  738 ,  744 ,  750 ,  760 ,  770 ,  790 ,  1520 ,  1530 ,  1540 ,  1810 ,  1820 ,  1830 ,  1840 ,  2010 , and/or  2020 . For brevity, these details are not repeated in the descriptions of the other processes. The various methods and techniques described above with reference to method  1200 , or sub-processes  1220 ,  1230 ,  1240 ,  1250 ,  1260 ,  1270 , and  1280 , are optionally implemented as one or more units, such as those described with regard to  FIG.  13   . 
     In accordance with some embodiments,  FIG.  13    shows an exemplary functional block diagram of an electronic device  1300  configured in accordance with the principles of the various described embodiments. In accordance with some embodiments, the functional blocks of electronic device  1300  are configured to perform the techniques described above. The functional blocks of the device  1300  are, optionally, implemented by hardware, software, or a combination of hardware and software to carry out the principles of the various described examples. It is understood by persons of skill in the art that the functional blocks described in  FIG.  13    are, optionally, combined or separated into sub-blocks to implement the principles of the various described examples. Therefore, the description herein optionally supports any possible combination or separation or further definition of the functional blocks described herein. 
     As shown in  FIG.  13   , an electronic device  1300  includes a display unit  1302  configured to display a graphic user interface, optionally, a touch-sensitive surface unit  1304  configured to receive contacts, and a processing unit  1306  coupled to the display unit  1302  and, optionally, the touch-sensitive surface unit  1304 . In some embodiments, the processing unit  1306  includes a detecting unit  1308 , a determining unit  1310 , a receiving unit  1312 , an enabling unit  1314 , an extending unit  1316 , a changing unit  1318 , and a display enabling unit  1320 . 
     The processing unit  1306  is configured to: enable display (e.g., with display enabling unit  1320 ), on the display unit  1302 , of a message region; enable display (e.g., with display enabling unit  1320 ), at a first position in the message region, of a bottom portion of a message transcript of messages sent between a first participant and a second participant; detect (e.g., with detecting unit  1308 ) contact on a location corresponding to the message transcript; detect (e.g., with detecting unit  1308 ) movement of the contact across the touch-sensitive surface and toward a top portion of the message region; and in response to detecting movement of the contact across the touch-sensitive surface and toward a top portion of the message region: enable display (e.g., with display enabling unit  1320 ), on the display unit  1302 , of the bottom portion of the message transcript at a second position in the message region above the first position; and enable display (e.g., with display enabling unit  1320 ), on the display unit  1302 , of a location-sharing affordance at the first position. 
     In some embodiments, the processing unit is further configured to: enable display (e.g., with display enabling unit  1320 ), on the display unit  1302 , of a keyboard below the message region; and while displaying the location-sharing affordance at the first position, receive a new message for display in the message region; and in response to receiving the new message: enable display (e.g., with display enabling unit  1320 ), on the display unit  1302 , of the new message in the message region; and cease display the location-sharing affordance. 
     In some embodiments, the processing unit is further configured to: detect (e.g., with detecting unit  1308 ) a selection of the location-sharing affordance; in response to detecting a selection of the location-sharing affordance: enable (e.g., with enabling unit  1314 ) the second participant to obtain the first participant location information during a predetermined location-sharing time period, wherein the predetermined location-sharing time period is scheduled to end at a first time. 
     In some embodiments, the processing unit is further configured to: detect (e.g., with detecting unit  1308 ) interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period; and in response to detecting interaction by one of the first participant and the second participant with the message conversation during the predetermined location-sharing time period: extend (e.g., with extending unit  1316 ) the predetermined location-sharing time period to end at a second time that is after the first time. 
     In some embodiments, the processing unit is further configured to: while displaying the location-sharing affordance, detect (e.g., with detecting unit  1308 ) an event that will cause a change in appearance of the transcript; in response to detecting the event: in accordance with a determination that the location-sharing is enabled: change (e.g., with changing unit  1318 ) the appearance of the transcript in accordance with the event; and maintain display (e.g., with display unit  1302 ) of the location-sharing affordance; and in accordance with a determination that the location-sharing is disabled: change (e.g., with changing unit  1318 ) the appearance of the transcript in accordance with the event; and cease to display the location-sharing affordance. 
     In some embodiments, the processing unit is further configured to: receive (e.g., with receiving unit  1312 ) a new message in the message conversation; and in response to receiving the new message: enable (e.g., enabling unit  1314 ) display, on the display unit  1302 , of a representation of the new message at the bottom portion of the transcript; and discontinue display of the location-sharing affordance. 
     In some embodiments, the processing unit is further configured to: detect (e.g., with detecting unit  1308 ) interaction with the location-sharing affordance; and in response to detecting interaction with the location-sharing affordance: discontinue display (e.g., with display unit  1302 ) of the location-sharing affordance. 
     In some embodiments, the processing unit is further configured to: determine (e.g., with detecting unit  1008 ) whether the movement of the contact across the touch-sensitive surface meets predefined criteria; in accordance with a determination that the movement meets the predetermined criteria: enable (e.g., enabling unit  1314 ) display, on the display unit  1302 , of the location-sharing affordance for a predetermined time; and discontinue display (e.g., with display unit  1302 ) of the location-sharing affordance after the predetermined time lapses; and in accordance with a determination that the movement does not meet the predetermined criteria: enable display (e.g., with display enabling unit  1320 ), on the display unit  1302 , of the location-sharing affordance. 
     In some embodiments, the movement comprises a release of the contact and wherein the predetermined criteria comprises a predetermined velocity of the movement at release. 
     The operations described above with reference to  FIGS.  12 A- 12 H  are, optionally, implemented by components depicted in  FIG.  1 A- 1 B,  3 ,  5 B , or  13 . For example, display operation  1202 , detecting operation  1204 , detecting operation  1206 , display operation  1208 , and display operation  1210  is implemented by event sorter  170 , event recognizer  180 , and event handler  190 . Event monitor  171  in event sorter  170  detects a contact on touch-sensitive display  112 , and event dispatcher module  174  delivers the event information to application  136 - 1 . A respective event recognizer  180  of application  136 - 1  compares the event information to respective event definitions  186 , and determines whether a first contact at a first location on the touch-sensitive surface corresponds to a predefined event or sub event, such as activation of an affordance on a user interface. When a respective predefined event or sub-event is detected, event recognizer  180  activates an event handler  190  associated with the detection of the event or sub-event. Event handler  190  optionally utilizes or calls data updater  176  or object updater  177  to update the application internal state  192 . In some embodiments, event handler  190  accesses a respective GUI updater  178  to update what is displayed by the application. Similarly, it would be clear to a person having ordinary skill in the art how other processes can be implemented based on the components depicted in  FIG.  1 A- 1 B,  3 ,  5 B , or  13 . 
       FIG.  14 A  illustrates an exemplary message user interface that is optionally displayed by device  1400 . In some embodiments, the user interface is displayed on device  300  or device  500 . The message user interface includes a message region  1402  for displaying messages  1406  and  1408  sent between a first participant (the user of device  1400 ) and a second participant in a message conversation and for displaying a banner  1404  including the name of the second participant and a current time of day. Messages sent between the participants are displayed inside bounded message areas. A bottom portion of the message transcript is displayed at a first position in the message region  1402 . The message region also includes a shared location affordance, map view  1410 , indicating that location information is currently shared, at the top of the message transcript. 
       FIG.  14 B  illustrates the message region after device  1400  has detected a request to scroll the message transcript. In some embodiments, a request to scroll results from a user scrolling the transcript or a new message arriving to push messages and map view  1410  up in the transcript. In response to the request to scroll, device  1400  determines whether the request to scroll the message transcript is a request to scroll the shared-location affordance  1410  beyond the message region  1402 . If the request is a request to scroll the shared-location affordance  1410  beyond the message region  1402 , then device  1400  discontinues displaying the shared-location affordance  1410  in the message region  1402  and displays a location-sharing status bar  1412  outside the message region. In the embodiment of  FIG.  14 B , the status bar is a banner above and adjacent to the message region and below banner  1404 . 
     Advantageously, this allows an indication of location sharing to remain on the user interface, while continuing a message conversation. Optionally, the user is reminded of location sharing, even as new messages in the message conversation cause the transcript to scroll out of view. Further, the user can receive updates on the location of the other participant or the travel time to the other participant, for example, even as new messages are continuously added to the transcript. 
     In some embodiments, discontinuing displaying the shared-location affordance  1410  and displaying the location-sharing status bar  1412  includes displaying an animated transition of the shared-location affordance  1410  turning into the location-sharing status bar  1412 . 
       FIG.  14 C  illustrates a user scrolling down the message transcript of the message user interface with the location-sharing status bar  1412  outside the message region. In response to detecting the request to scroll the message transcript, device  1400  determines whether the request to scroll the message transcript comprises a request to display the shared-location affordance  1410  in the message region  1402 . If the detected request is a request to scroll the shared-location affordance  1410  in the message region  1402 , then device  1400  discontinues displaying the location-sharing status bar  1412  outside the message region and displays the shared-location affordance  1410  in the message region  1402  (see  FIG.  14 D ). 
     In some embodiments, discontinuing displaying the location-sharing status bar  1412  and displaying the shared-location affordance  1410  includes displaying an animated transition of the location-sharing status bar  1412  turning into the shared-location affordance  1410 . 
     In some embodiments, a location-sharing status bar includes an indication of a distance between the first participant and the second participant. In some embodiments, a location-sharing status bar includes an indication of a travel time between the first participant and the second participant. In some embodiments, a location-sharing status bar alternates from the indication of a distance between the first participant and the second participant to the indication of the travel time between the first participant and the second participant. In some embodiments, the travel time between the first participant and the second participant is determined by the distance between the first participant and the second participant and a mode of transport. In some embodiments, the location-sharing status bar includes a representation of at least one of a period of time until location sharing will end and a time of day until location sharing will end. In some embodiments, the location-sharing status bar includes one of a current location of the first participant and a map view depicting the current location of the first participant. 
     In some embodiments, selection of the location-sharing status bar results in launching a map view (e.g., a map displayed in a location sharing application) with a representation of a location of the first participant and the second participant. 
     In some embodiments, selection of a map view affordance results in display of an enlarged map view. In some embodiments, the map view affordance indicates that multiple message conversation participants are sharing their respective locations (for example, text stating multiple view locations are available). In such embodiments, in response to detecting a section of the map view affordance, device  1400  displays a map view comprising representations of the multiple message conversation participants. 
       FIG.  14 E  illustrates the message region after device  1400  has detected a request to scroll the message transcript of  FIG.  14 A . In the example of  FIG.  14 E , a message  1406  is added to the conversation. In response to detecting a request to scroll the message transcript such that the map  1410  is no longer displayed in the transcript  1402 , the map view is displayed in the banner  1404  behind the name of the second participant and the current time of day. In the embodiment of the  FIG.  14 E , the location-sharing status bar comprises the banner  1404 , which includes the name of the second participant and the current time of day, and the map view. 
     Advantageously, this allows an indication of location sharing to remain on the user interface, while continuing a message conversation. Optionally, the user is reminded of location sharing, even as new messages in the message conversation cause the transcript to scroll out of view. Further, the user can receive updates on the location of the other participant or the travel time to the other participant, for example, even as new messages are continuously added to the transcript. Further, by including the map view in the banner  1404 , space in the message transcript  1402  is not occupied by information related to location sharing. This feature may improve the user&#39;s experience by allowing more messages in the message conversation to be displayed in the message transcript  1402 . 
     In some embodiments, text of the banner (such as the time and name of the message participant in  FIG.  14 E ) is also displayed. In some embodiments, text is not displayed in the banner when the map view is also displayed. In some embodiments, the location of the participant is displayed in the center of the banner. In some embodiments, the location of the participant is displayed off-center of the banner so that the text and location is optionally displayed without interference (as in  FIG.  14 E ). 
       FIG.  15 A  is a flow diagram illustrating process  1500  for sharing a message participant&#39;s location information using an electronic device in accordance with some embodiments. Process  1500  is performed at an electronic device (e.g., device  100 ,  300 ,  500 ) with a display and a touch-sensitive surface. Some operations in process  1500  are optionally combined, the order of some operations is optionally changed, and some operations are optionally omitted. 
     As described below, process  1500  provides an intuitive way for sharing location information. The method reduces the cognitive burden on a user for sharing location information, thereby creating a more efficient human-machine interface. For battery-operated computing devices, enabling a user to share location information faster and more efficiently conserves power and increases the time between battery charges. 
     At block  1502 , the device displays, on the display, a message region (e.g., message region  1402  in  FIG.  14 A ) with messages sent (e.g., messages  1406  and  1408  in  FIG.  14 A ) between a first participant and a second participant in a message conversation. At block  1504 , the device displays at a first position in the message transcript, a shared location affordance (e.g., shared location affordance  1410  in  FIG.  14 A ). While displaying the shared location affordance at the first position, at block  1506  detects a request to scroll the message transcript (e.g., receiving new message  1406  in  FIG.  14 B ). In some embodiments, a request to scroll results from a user scrolling a transcript or a new message to push messages and map views up in the transcript. In response to detecting the request to scroll the message transcript, at block  1508  the device determines whether the request to scroll the message transcript comprises a request to scroll the shared location affordance beyond the message region (e.g., a request to scroll shared location affordance  1410  outside message region  1402  in  FIG.  14 B ). In accordance with a determination that the request to scroll the message transcript comprises a request to scroll the shared location affordance beyond the message region, at block  1510  the device discontinues display of the shared location in the message transcript and displays a location-sharing status bar (e.g., location-sharing status bar  1412  in  FIG.  14 B ) outside the message region. In some embodiments, discontinuing displaying the shared location affordance and displaying the location-sharing status bar includes displaying an animated transition of the shared location affordance turning into the location-sharing status bar. In accordance with a determination that the request to scroll the message transcript does not comprise a request to scroll the shared location affordance beyond the message region, at block  1512  the device displays the shared location affordance at a second location in the message transcript (e.g., a shared location affordance is displayed above its previous position in a message transcript). 
     Advantageously, this allows an indication of location sharing to remain on the user interface, while continuing a message conversation. Optionally, the user is reminded of location sharing, even as new messages in the message conversation cause the transcript to scroll out of view. Further, the user can receive updates on the location of the other participant or the travel time to the other participant, for example, even as new messages are continuously added to the transcript. 
       FIG.  15 B  is a flow diagram illustrating sub-process  1520  which is optionally performed during process  1500  ( FIG.  15 A ). While displaying a location-sharing status bar outside the message region, at block  1522  the device detects a second request to scroll the message transcript (e.g., contact of the finger on the display of device  1400  in  FIG.  14 C , followed by movement of the finger in the direction of the arrow in  FIG.  14 C ). In response to detecting the second request to scroll the message transcript, at block  1524  the device determines whether the second request to scroll the message transcript comprises a request to display the shared location affordance in the message region (e.g., display of shared-location affordance  1410  in  FIG.  14 D ). In accordance with a determination that the second request to scroll the message transcript comprises a request to display the shared location affordance in the message region, at block  1526  the device discontinues displaying the location-sharing status bar outside the message region and displays the shared location affordance in the message transcript (e.g., display of shared location affordance  1410  in message transcript  1402  in  FIG.  14 D ). In some embodiments, discontinuing displaying the location-sharing status bar and displaying the shared location affordance includes displaying an animated transition of the location-sharing status bar turning into the shared location affordance. In accordance with a determination that the second request to scroll the message transcript does not comprise a request to display the shared location affordance in the message region, at block  1528  the device forgoes displaying the shared location affordance in the message transcript. 
     In some embodiments, the location-sharing status bar comprises an indication of a distance between the first participant and the second participant. In some embodiments, the location-sharing status bar comprises an indication of a travel time between the first participant and the second participant (e.g., “20 mins away” in location-sharing status bar  1412  in  FIG.  14 B ). In some embodiments, the location-sharing status bar alternates from the indication of a distance between the first participant and the second participant to the indication of the travel time between the first participant and the second participant. In some embodiments, the travel time between the first participant and the second participant is determined by the distance between the first participant and the second participant and a mode of transport. In some embodiments, the location-sharing status bar comprises a map view in a banner (e.g., the map view in banner  1404  in  FIG.  14 E ) that includes the name of the second participant and a current time of day, where the map view is displayed behind the name of the second participant and a current time of day. 
       FIG.  15 C  is a flow diagram illustrating sub-process  1530  which is optionally performed during process  1500  ( FIG.  15 A ). In the embodiment of  FIG.  15 C , the location-sharing status bar is selectable. At block  1532 , the device detects a selection of the location-sharing status bar (e.g., detecting contact on device  1400  at point corresponding to location-sharing status bar  1412 ). In response to detecting a selection of the location-sharing status bar, at block  1534  the device launches a map view (e.g., a map displayed in a location sharing application), wherein the map view includes a representation of a location of the first participant and a location of the second participant. 
     In some embodiments, the location-sharing status bar comprises a representation of at least one of a period of time until location sharing will end and a time of day until location sharing will end. In some embodiments, the location-sharing status bar comprises one selected from the group consisting of a current location of the first participant and a map view depicting the current location of the first participant. 
       FIG.  15 D  is a flow diagram illustrating sub-process  1540 , which is optionally performed during process  1500  ( FIG.  15 A ). At block  1542 , the device displays a map-view affordance (e.g., map-view affordance  1410  in  FIG.  14 A ). At block  1544 , the device detects a selection of the map view affordance. In response to detecting a selection of the map view affordance, at block  1546  displays a map view comprising a representation of a location of the first participant. In some embodiments, the map view affordance indicates that multiple message conversation participants are sharing their respective locations (for example, text stating that multiple view locations are available) and further in response to detecting a selection of the map view affordance, the device displaying a map view comprising representations of respective locations of the multiple message conversation participants. 
     In some embodiments, displaying a location-sharing status bar outside of the message region comprises displaying the location-sharing status bar above and adjacent to the message region. 
     Note that details of the processes described above with respect to process  1500  (e.g.,  FIGS.  15 A- 15 D ) are also applicable in an analogous manner to the processes described herein. For example, processes  700 ,  900 ,  1200 ,  1800 , and  2000  optionally include one or more of the characteristics of the various processes described above with reference to process  1500 . For example, determine block  1508  is optionally incorporated in any of processes  700 ,  900 ,  1200 ,  1800 , and/or  2000 . Additionally, the conversations, location sharing affordances, shared location affordances, location-sharing time periods, participants, participant location information, location sharing extensions, scroll detection, display of shared location affordances, map views, and location-sharing status bars described above with reference to process  1500 , or sub-processes  1520 ,  1530 , and  1540 , optionally share some or all of the characteristics with the conversations, location sharing affordances, shared location affordances, location-sharing time periods, participants, participant location information, location sharing extensions, scroll detection, display of shared location affordances, map views, and location-sharing status bars described with reference to processes  700 ,  900 ,  1200 ,  1800 , and/or  2000 , or sub-processes  720 ,  726 ,  732 ,  738 ,  744 ,  750 ,  760 ,  770 ,  790 ,  1220 ,  1230 ,  1240 ,  1250 ,  1260 ,  1270 ,  1280 ,  1810 ,  1820 ,  1830 ,  1840 ,  2010 , and/or  2020 . For brevity, these details are not repeated in the descriptions of the other processes. The various methods and techniques described above with reference to method  1500 , or sub-processes  1520 ,  1530 , and  1540 , are optionally implemented as one or more units, such as those described with regard to  FIG.  16   . 
     In accordance with some embodiments,  FIG.  16    shows an exemplary functional block diagram of an electronic device  1600  configured in accordance with the principles of the various described embodiments. In accordance with some embodiments, the functional blocks of electronic device  1600  are configured to perform the techniques described above. The functional blocks of the device  1600  are, optionally, implemented by hardware, software, or a combination of hardware and software to carry out the principles of the various described examples. It is understood by persons of skill in the art that the functional blocks described in  FIG.  16    are, optionally, combined or separated into sub-blocks to implement the principles of the various described examples. Therefore, the description herein optionally supports any possible combination or separation or further definition of the functional blocks described herein. 
     As shown in  FIG.  16   , an electronic device  1600  includes a display unit  1602  configured to display a graphic user interface, optionally, a touch-sensitive surface unit  1604  configured to receive contacts, and a processing unit  1606  coupled to the display unit  1602  and, optionally, the touch-sensitive surface unit  1604 . In some embodiments, the processing unit  1606  includes a detecting unit  1608 , a determining unit  1610 , a launching unit  1612 , an enabling unit  1614 , and a display enabling unit  1616 . 
     The processing unit  1606  is configured to: enable display (e.g., with display enabling unit  1616 ), on the display unit  1602 , of a message region; enable display (e.g., with display enabling unit  1616 ), in the message region, of a message transcript of messages sent between a first participant and a second participant; enable (e.g., with enabling unit  1614 ) display(e.g., with display unit  1302 ), at a first position in the message transcript, of a shared-location affordance; while displaying the shared-location affordance at the first position, detect (e.g., with detecting unit  1608 ) a request to scroll the message transcript; in response to detecting the request to scroll the message transcript: determine (e.g., with determining unit  1610 ) whether the request to scroll the message transcript comprises a request to scroll the shared-location affordance beyond the message region; in accordance with a determination that the request to scroll the message transcript comprises a request to scroll the shared-location affordance beyond the message region: discontinue display (e.g., with display unit  1602 ) of the shared location in the message transcript; and enable display (e.g., with display enabling unit  1616 ), on the display unit  1602 , of a location-sharing status bar outside the message region; and in accordance with a determination that the request to scroll the message transcript does not comprise a request to scroll the shared-location affordance beyond the message region: enable display (e.g., with display enabling unit  1616 ), on the display unit, of the shared-location affordance at a second location in the message transcript. 
     In some embodiments, the processing unit is further configured to: while displaying a location-sharing status bar outside the message region, detect (e.g., with detecting unit  1608 ) a second request to scroll the message transcript; in response to detecting the second request to scroll the message transcript: determine (e.g., with determining unit  1610 ) whether the second request to scroll the message transcript comprises a request to display the shared-location affordance in the message region; in accordance with a determination that the second request to scroll the message transcript comprises a request to display the shared-location affordance in the message region: discontinue display (e.g., with display unit  1602 ) of the location-sharing status bar outside the message region; enable display (e.g., with display enabling unit  1616 ), on the display unit, of the shared-location affordance in the message transcript; and in accordance with a determination that the second request to scroll the message transcript does not comprise a request to display the shared-location affordance in the message region: forgo display (e.g., with display unit  1602 ) of the shared-location affordance in the message transcript. 
     In some embodiments, the location-sharing status bar comprises an indication of a distance between the first participant and the second participant. 
     In some embodiments, the location-sharing status bar comprises an indication of a travel time between the first participant and the second participant. 
     In some embodiments, the location-sharing status bar alternates from the indication of a distance between the first participant and the second participant to the indication of the travel time between the first participant and the second participant. 
     In some embodiments, the travel time between the first participant and the second participant is determined by the distance between the first participant and the second participant and a mode of transport. 
     In some embodiments, the location-sharing status bar is selectable, and wherein the processing unit is further configured to: detect (e.g., with detecting unit  1608 ) a selection of the location-sharing status bar; and in response to detecting a selection of the location-sharing status bar: launch (e.g., with launching unit  1612 ) a map view, wherein the map view comprises a representation of a location of the first participant and a location of the second participant. 
     In some embodiments, the location-sharing status bar comprises a representation of at least one of a period of time until location sharing will end and a time of day until location sharing will end. 
     In some embodiments, the location-sharing status bar comprises one selected from the group consisting of a current location of the first participant and a map view depicting the current location of the first participant. 
     In some embodiments, the processing unit is further configured to: enable display (e.g., with display enabling unit  1616 ), on the display unit, of a map view affordance; detect (e.g., with detecting unit  1608 ) a selection of the map view affordance; and in response to detecting a selection of the map view affordance: enable display (e.g., with display enabling unit  1616 ), on the display unit, of a map view comprising a representation of a location of the first participant. 
     In some embodiments, the map view affordance indicates that multiple message conversation participants are sharing their respective locations, and wherein the processing unit is further configured to: further in response to detecting a selection of the map view affordance: enable display (e.g., with display enabling unit  1616 ), on the display unit, of a map view comprising representations of respective locations of the multiple message conversation participants. 
     In some embodiments, enabling display of a location-sharing status bar outside of the message region comprises enabling display of the location-sharing status bar above and adjacent to the message region. 
     The operations described above with reference to  FIGS.  15 A- 15 D  are, optionally, implemented by components depicted in  FIG.  1 A- 1 B,  3 ,  5 B , or  16 . For example, display operation  1502 , display operation  1504 , detecting operation  1506 , determining operation  1508 , discontinue display operation  1510 , and display operation  1512  is implemented by event sorter  170 , event recognizer  180 , and event handler  190 . Event monitor  171  in event sorter  170  detects a contact on touch-sensitive display  112 , and event dispatcher module  174  delivers the event information to application  136 - 1 . A respective event recognizer  180  of application  136 - 1  compares the event information to respective event definitions  186 , and determines whether a first contact at a first location on the touch-sensitive surface corresponds to a predefined event or sub event, such as activation of an affordance on a user interface. When a respective predefined event or sub-event is detected, event recognizer  180  activates an event handler  190  associated with the detection of the event or sub-event. Event handler  190  optionally utilizes or calls data updater  176  or object updater  177  to update the application internal state  192 . In some embodiments, event handler  190  accesses a respective GUI updater  178  to update what is displayed by the application. Similarly, it would be clear to a person having ordinary skill in the art how other processes can be implemented based on the components depicted in  FIG.  1 A- 1 B,  3 ,  5 B , or  16 . 
       FIG.  17 A  illustrates an exemplary message user interface that is optionally displayed by device  1700 . In some embodiments, the user interface is displayed on device  300  or device  500 . The message user interface includes a message region  1702  for displaying messages  1706  and  1708  sent between a first participant (the user of device  1700 ) and a second participant in a message conversation and for displaying a banner  1704  including the name of the second participant and a current time of day. Messages sent between the participants are displayed inside bounded message areas. The message region also includes a map view  1710  with a representation of the first participant&#39;s location, indicating that location information is currently shared, below and adjacent the message transcript. 
     In some embodiments, device  1700  displays a representation of the first participant&#39;s updated location in the shared-location affordance as the first participant&#39;s location changes. In some embodiments, displaying the representation of the updated location includes shifting the map while maintaining the representation of the first participant in the same location on the display. 
       FIG.  17 B  illustrates a user selecting map view  1710 . In response to detecting the user&#39;s selection, device  1700  displays an enlarged map view  1714  ( FIG.  17 C ) with a representation of the first participant at a location that corresponds to a location of the first participant. 
     In some embodiments, the selection is a predefined gesture, such as a single tap gesture, a double tap gesture, or a press and hold gesture (for example, a contact that is detected for more than a threshold amount of time). In some embodiments, if device  1700  determines that the characteristic of the gesture do not meet a predefined threshold, device  1700  forgoes enlarging the map view. 
     In some embodiments, device  1700  enlarges the map view with animation, such as a page curl or fade in. In some embodiments, enlarging the map view includes gradually enlarging the map view as a parameter associated with the gesture changes (for example, as a duration or intensity of the contact increases, the animation speed increases). 
     In some embodiments, a second map view is displayed if both participants are simultaneously sharing their locations (see  FIG.  6 H ). In some embodiments, shared-location affordance  1710  continues to be displayed at the bottom of the transcript as new messages are added to the message transcript. In some embodiments, shared-location affordance  1710  includes a representation of the first participant, such as an avatar or a captured image. 
     In some embodiments, selection of a location-sharing affordance consists of a single contact. In response to the selection, device  1700  enables the second participant to obtain the first participant location information and displays a modified location-sharing affordance. (See, e.g.,  FIGS.  6 A- 6 B ). Advantageously, this single contact improves the user experience by minimizing the number of selections necessary to share location. In some embodiments, device  1700  enables the second participant to obtain the first participant location information without adding a new message to the message transcript. 
     In some embodiments, the second participant receives updated first participant location information as the first participant&#39;s location changes. In some embodiments, displaying a modified location-sharing affordance comprises replacing the location-sharing affordance with the modified location-sharing affordance. In some embodiments, a message compose field includes the modified location-sharing affordance. For example, the modified location-sharing affordance is displayed within a text entry field that is configured for entering text for draft messages. In some embodiments, tapping in the message compose field at a location that is away from the modified location-sharing affordance causes a cursor to be displayed in the message compose field (and, if a keyboard is not displayed, optionally, causes a soft keyboard to be displayed for entering text into the message compose field at the location of the cursor), while tapping in the message compose field at a location that corresponds to the location-sharing affordance toggles on/off location sharing. In some embodiments, the modified location-sharing affordance is discontinued after detection of a message composition. 
       FIG.  17 D  illustrates another option for displaying a shared location map. In  FIG.  17 D , shared-location affordance  1718  is a map view inserted at the bottom right corner of the message transcript  1702 , similar to the shared-location affordance  1710  of  FIG.  17 A . Shared-location affordance  1718  has a rounded top corner at the center of the message transcript. The shared location affordance  1718  is optionally aligned to the same side of the message region as messages from the participant whose location is being shared (as illustrated in  FIG.  17 D , for example). 
     In some embodiments, the most recent message  1708  sent by the first participant is centered in the message transcript  1702 . The tail of the most recent message  1708  is pointed toward the rounded corner of the shared-location affordance. 
       FIG.  17 E  illustrates the user interface of  FIG.  17 D  after second participant location information is shared (as depicted by shared-location affordance  1722 ) and a new message  1720  is added by the second participant. As in  FIG.  17 D , the last message sent/received  1720  is centered in the message transcript  1702  and the other messages are aligned with the side of message transcript  1702 . 
     In some embodiments, the displayed map region is not scrolled with the message transcript; it remains stationary in the message region as new messages are displayed. In this manner, participants can continue to view shared location information over the course of a message conversation, as the transcript continues to be scrolled. 
       FIG.  18 A  is a flow diagram illustrating process  1800  for sharing a message participant&#39;s location information using an electronic device in accordance with some embodiments. Process  1800  is performed at an electronic device (e.g., device  100 ,  300 ,  500 ) with a display and a touch-sensitive surface. Some operations in process  1800  are optionally combined, the order of some operations is optionally changed, and some operations are optionally omitted. 
     As described below, process  1800  provides an intuitive way for sharing location information. The method reduces the cognitive burden on a user for sharing location information, thereby creating a more efficient human-machine interface. For battery-operated computing devices, enabling a user to share location information faster and more efficiently conserves power and increases the time between battery charges. 
     At block  1802 , the device displays, on the display, a message region (e.g., message region  1702  in  FIG.  17 A ) with messages sent (e.g., messages  1706  and  1708  in  FIG.  17 A ) between a first participant and a second participant in a message conversation. At block  1804 , the device displays a shared location affordance (e.g., shared location affordance  1710  in  FIG.  17 A ), in the message region, below and adjacent to the message transcript, wherein the shared location affordance comprises a representation of a location of the first participant. In some embodiments, the most recent message (e.g., message  1708  in  FIG.  17 D  or message  1718  in  FIG.  17 E ) in the message conversation is centered in the message transcript (e.g., message transcript  1702  in  FIGS.  17 D and  17 E ). 
     In some embodiments, the shared location affordance comprises a map view (e.g., map view  1710  in  FIG.  17 A ). 
       FIG.  18 B  is a flow diagram illustrating sub-process  1810 , which is optionally performed during process  1800  ( FIG.  18 A ). At block  1812 , the device detects a predefined gesture on the touch-sensitive surface at a position that corresponds to the shared location affordance (e.g., detecting contact on shared location affordance  1710  in  FIG.  17 B ). In some embodiments, the selection is a predefined gesture, such as a single tap gesture, a double tap gesture, or a press and hold gesture (for example, a contact that is detected for more than a threshold amount of time). In response to detecting the predefined gesture, at block  1814  the device enlarges the map view (e.g., enlarged map view  1714  in  FIG.  17 C ). In some embodiments, enlarging the map view includes animation, such as a page curl or fade in. In some embodiments, enlarging the map view includes gradually enlarging the map view as a parameter associated with the gesture changes (for example, as a duration or intensity of the contact increases, the animation speed increases). In some embodiments, if a device determines that the characteristic of the gesture do not meet a predefined threshold, the device forgoes enlarging the map view. 
     In some embodiments, the device displays the representation of the first participant on the map view at a position that corresponds to a location of the first participant. 
       FIG.  18 C  is a flow diagram illustrating sub-process  1820 , which is optionally performed during process  1800  ( FIG.  18 A ). At block  1822 , the device displays a second map view in the message transcript (e.g., a second map view displayed in message region  1702  in  FIG.  17 A ). At block  1824 , the device displays a representation of the second participant at a position on the second map view that corresponds to a location of the second participant (e.g., map view  638  in  FIG.  6 H ). 
       FIG.  18 D  is a flow diagram illustrating sub-process  1830  which is optionally performed during process  1800  ( FIG.  18 A ). At block  1832 , the device receives an updated location of the first participant. In response to receiving the updated location of the first participant, at block  1834 , the device displays a representation of the updated location of the first participant in the shared location affordance associated with the first participant (e.g., by updating map view  1710  in  FIG.  17 B ). In some embodiments, displaying the representation of the updated location includes shifting the map while maintaining the representation of the first participant in the same location on the display (e.g., by maintaining the solid circle and concentric line, while scrolling the background, in the map view of  1710 ). 
       FIG.  18 E  is a flow diagram illustrating sub-process  1810 , which is optionally performed during process  1800  ( FIG.  18 A ). At block  1842 , the device receives a new message sent between the first and second participant in the message conversation. In response to receiving the new message, at block  1844  the device displays a representation of the new message at the bottom of the transcript (e.g., new message  1720  is added to message transcript  1702  in  FIG.  17 E ) and continues to display the shared location affordance at the same location (e.g., map view  1718  remains in position at the bottom right of the message transcript  1702  in  FIG.  17 A ). 
     In some embodiments, the shared location affordance comprises a representation of the first participant, such as an avatar or a captured image. 
     Note that details of the processes described above with respect to process  1800  (e.g.,  FIGS.  18 A- 18 E ) are also applicable in an analogous manner to the processes described herein. For example, processes  700 ,  900 ,  1200 ,  1500 , and  2000  optionally include one or more of the characteristics of the various processes described above with reference to process  1800 . For example, display block  1802  is optionally incorporated in any of processes  700 ,  900 ,  1200 ,  1500 , and/or  2000 . Additionally, the conversations, location sharing affordances, shared location affordances, location-sharing time periods, participants, participant location information, location sharing extensions, map views, and detection of gestures described above with reference to process  1800 , or sub-processes  1810 ,  1820 ,  1830 , and  1840 , optionally share some or all of the characteristics with the conversations, location sharing affordances, shared location affordances, location-sharing time periods, participants, participant location information, location sharing extensions, map views, and detection of gestures described with reference to processes  700 ,  900 ,  1200 ,  1500 , and/or  2000 , or sub-processes  720 ,  726 ,  732 ,  738 ,  744 ,  750 ,  760 ,  770 ,  790 ,  1220 ,  1230 ,  1240 ,  1250 ,  1260 ,  1270 ,  1280 ,  1520 ,  1530 ,  1540 ,  2010 , and/or  2020 . For brevity, these details are not repeated in the descriptions of the other processes. The various methods and techniques described above with reference to method  1800 , or sub-processes  1810 ,  1820 ,  1830 , and  1840 , are optionally implemented as one or more units, such as those described with regard to  FIG.  19   . 
     In accordance with some embodiments,  FIG.  19    shows an exemplary functional block diagram of an electronic device  1900  configured in accordance with the principles of the various described embodiments. In accordance with some embodiments, the functional blocks of electronic device  1900  are configured to perform the techniques described above. The functional blocks of the device  1900  are, optionally, implemented by hardware, software, or a combination of hardware and software to carry out the principles of the various described examples. It is understood by persons of skill in the art that the functional blocks described in  FIG.  19    are, optionally, combined or separated into sub-blocks to implement the principles of the various described examples. Therefore, the description herein optionally supports any possible combination or separation or further definition of the functional blocks described herein. 
     As shown in  FIG.  19   , an electronic device  1900  includes a display unit  1902  configured to display a graphic user interface, optionally, a touch-sensitive surface unit  1904  configured to receive contacts, and a processing unit  1906  coupled to the display unit  1902  and, optionally, the touch-sensitive surface unit  1904 . In some embodiments, the processing unit  1906  includes a detecting unit  1908 , a determining unit  1910 , an enlarging unit  1912 , an enabling unit  1914 , a receiving unit  1916 , and a display enabling unit  1918 . 
     The processing unit  1906  is configured to: enable display (e.g., with display enabling unit  1918 ), on the display unit, of a message region; enable display (e.g., with display enabling unit  1918 ), in the message region, of a message transcript of messages sent between a first participant and a second participant; and enable display (e.g., with display unit  1902 ), on the display unit, of a shared-location affordance in the message region, wherein the shared-location affordance is displayed below and adjacent to the message transcript, and wherein the shared-location affordance comprises a representation of a location of the first participant. 
     In some embodiments, the shared-location affordance comprises a map view. 
     In some embodiments, the processing unit is further configured to: detect (e.g., with detecting unit  1908 ) a predefined gesture on the touch-sensitive surface at a position that corresponds to the shared-location affordance; in response to detecting the predefined gesture, enlarge (e.g., with enlarging unit  1912 ) the map view. 
     In some embodiments, enlarging the map view comprises gradually enlarging the map view as a parameter associated with the gesture changes. 
     In some embodiments, the processing unit is further configured to: enable (e.g., with enabling unit  1914 ) display, on the display unit, of the representation of the first participant on the map view at a position that corresponds to a location of the first participant. 
     In some embodiments, the processing unit is further configured to: enable (e.g., with enabling unit  1914 ) display, on the display unit, of a second map view in the message transcript; and enable display, on the display unit, of a representation of the second participant at a position on the second map view that corresponds to a location of the second participant. 
     In some embodiments, the processing unit is further configured to: receive (e.g., with receiving unit  1916 ) an updated location of the first participant; and in response to receiving the updated location of the first participant: enable (e.g., with enabling unit  1914 ) display, on the display unit, of a representation of the updated location of the first participant in the shared-location affordance associated with the first participant. 
     In some embodiments, the processing unit is further configured to: receive (e.g., with receiving unit  1916 ) a new message sent between the first and second participant in the message conversation; and in response to receiving the new message: enable (e.g., with enabling unit  1914 ) display, on the display unit, of a representation of the new message at the bottom of the transcript; and continue enabling display of the shared-location affordance at the same location. 
     In some embodiments, the shared-location affordance comprises a representation of the first participant. 
     The operations described above with reference to  FIGS.  18 A- 18 E  are, optionally, implemented by components depicted in  FIG.  1 A- 1 B,  3 ,  5 B , or  19 . For example, display operation  1802  and display operation  1804  is implemented by event sorter  170 , event recognizer  180 , and event handler  190 . Event monitor  171  in event sorter  170  detects a contact on touch-sensitive display  112 , and event dispatcher module  174  delivers the event information to application  136 - 1 . A respective event recognizer  180  of application  136 - 1  compares the event information to respective event definitions  186 , and determines whether a first contact at a first location on the touch-sensitive surface corresponds to a predefined event or sub event, such as activation of an affordance on a user interface. When a respective predefined event or sub-event is detected, event recognizer  180  activates an event handler  190  associated with the detection of the event or sub-event. Event handler  190  optionally utilizes or calls data updater  176  or object updater  177  to update the application internal state  192 . In some embodiments, event handler  190  accesses a respective GUI updater  178  to update what is displayed by the application. Similarly, it would be clear to a person having ordinary skill in the art how other processes can be implemented based on the components depicted in  FIG.  1 A- 1 B,  3 ,  5 B , or  19 . 
       FIG.  20 A  is a flow diagram illustrating process  2000  for sharing a message participant&#39;s location information using an electronic device in accordance with some embodiments. Process  2000  is performed at an electronic device (e.g., device  100 ,  300 ,  500 ) with a display and a touch-sensitive surface. Some operations in process  2000  are optionally combined, the order of some operations is optionally changed, and some operations are optionally omitted. 
     As described below, process  2000  provides an intuitive way for sharing location information. The method reduces the cognitive burden on a user for sharing location information, thereby creating a more efficient human-machine interface. For battery-operated computing devices, enabling a user to share location information faster and more efficiently conserves power and increases the time between battery charges. 
     At block  2002 , the device displays, on the display, a message region (e.g., message region  602  in  FIG.  6 A ) with messages sent (e.g., messages  606  and  608  in  FIG.  6 A ) between a first participant and a second participant in a message conversation. At block  2004 , the device displays a location-sharing affordance (e.g., location-sharing affordance  610  in  FIG.  6 A ). At block  2006 , the device detects a selection of the location-sharing affordance, wherein detecting a selection of the location-sharing affordance by the first participant consists of detecting a single contact by the first participant. In response to detecting a selection of the location-sharing affordance, at block  2008 , the device enables the second participant to obtain the first participant location information and displays a modified location-sharing affordance (e.g., modified location-sharing affordance  616  in  FIG.  6 B ). 
     Advantageously, this single contact improves the user experience by minimizing the number of selections necessary to share location. In some embodiments, the device enables the second participant to obtain the first participant location information without adding a new message to the message transcript. 
     In some embodiments, enabling the second participant to obtain the first participant location information is performed without adding a new message to the message transcript. 
       FIG.  20 B  is a flow diagram illustrating sub-process  2010 , which is optionally performed during process  2000  ( FIG.  20 A ). At block  2012 , the device receives an updated location of the first participant. In response to receiving an updated location of the first participant, at block  2014  the device enables the second participant to obtain the updated first participant location information (e.g., by providing updated map view  320  in  FIG.  6 C ). 
     In some embodiments, displaying a modified location-sharing affordance comprises replacing the location-sharing affordance with the modified location-sharing affordance. 
     In some embodiments, the device displays a message compose field that includes a modified location-sharing affordance. For example, the modified location-sharing affordance is displayed within a text entry field that is configured for entering text for draft messages. In some embodiments, tapping in the message compose field at a location that is away from the modified location-sharing affordance causes a cursor to be displayed in the message compose field (and, if a keyboard is not displayed, optionally, causes a soft keyboard to be displayed for entering text into the message compose field at the location of the cursor), while tapping in the message compose field at a location that corresponds to the location-sharing affordance toggles on/off location sharing. In some embodiments, the modified location-sharing affordance is discontinued after detection of a message composition. 
       FIG.  20 C  is a flow diagram illustrating sub-process  2020 , which is optionally performed during process  2000  ( FIG.  20 A ). At block  2022 , the device detects a message composition (e.g., by selection of the text message entry affordance  1110  in  FIG.  11 C ). In response to detecting a message composition, at block  2024  the device discontinues displaying the modified location-sharing affordance (e.g., by not displaying modified location-sharing affordance  616  in  FIG.  6 B ). 
     In some embodiments, the modified location-sharing affordance is a toggle. 
     Note that details of the processes described above with respect to process  2000  (e.g.,  FIGS.  20 A- 20 C ) are also applicable in an analogous manner to the processes described herein. For example, processes  700 ,  900 ,  1200 ,  1500 , and  1800  optionally include one or more of the characteristics of the various processes described above with reference to process  2000 . For example, enable block  2008  is optionally incorporated in any of processes  700 ,  900 ,  1200 ,  1500 , and/or  1800 . Additionally, the conversations, location sharing affordances, shared location affordances, location-sharing time periods, participants, participant location information, location sharing extensions, selection detection, and responses to selection detection described above with reference to process  2000 , or sub-processes  2010  and  2020 , optionally share some or all of the characteristics with the conversations, location sharing affordances, shared location affordances, location-sharing time periods, participants, participant location information, location sharing extensions, selection detection, and responses to selection detection described with reference to processes  700 ,  900 ,  1200 ,  1500 , and/or  1800 , or sub-processes  720 ,  726 ,  732 ,  738 ,  744 ,  750 ,  760 ,  770 ,  790 ,  1220 ,  1230 ,  1240 ,  1250 ,  1260 ,  1270 ,  1280 ,  1520 ,  1530 ,  1540 ,  1810 ,  1820 ,  1830 , and/or  1840 . For brevity, these details are not repeated in the descriptions of the other processes. The various methods and techniques described above with reference to method  2000 , or sub-processes  2010  and  2020 , are optionally implemented as one or more units, such as those described with regard to  FIG.  21   . 
     In accordance with some embodiments,  FIG.  21    shows an exemplary functional block diagram of an electronic device  2100  configured in accordance with the principles of the various described embodiments. In accordance with some embodiments, the functional blocks of electronic device  2100  are configured to perform the techniques described above. The functional blocks of the device  2100  are, optionally, implemented by hardware, software, or a combination of hardware and software to carry out the principles of the various described examples. It is understood by persons of skill in the art that the functional blocks described in  FIG.  21    are, optionally, combined or separated into sub-blocks to implement the principles of the various described examples. Therefore, the description herein optionally supports any possible combination or separation or further definition of the functional blocks described herein. 
     As shown in  FIG.  21   , an electronic device  2100  includes a display unit  2102  configured to display a graphic user interface, optionally, a touch-sensitive surface unit  2104  configured to receive contacts, and a processing unit  2106  coupled to the display unit  2102  and, optionally, the touch-sensitive surface unit  2104 . In some embodiments, the processing unit  2106  includes a detecting unit  2108 , a determining unit  2110 , an enabling unit  2112 , a receiving unit  2114 , and a display enabling unit  2116 . 
     The processing unit  2106  is configured to: enable display (e.g., with enabling unit  2116 ), on the display unit  2102 , of a message region for displaying a message transcript of messages sent between a first participant and a second participant in a message conversation; enable display (e.g., with enabling unit  2116 ), on the display unit  2102 , of a location-sharing affordance; detect (e.g., with enabling unit  2108 ) a selection of the location-sharing affordance, wherein detecting a selection of the location-sharing affordance by the first participant consists of detecting a single contact by the first participant; and in response to detecting a selection of the location-sharing affordance: enable (e.g., with enabling unit  2112 ) the second participant to obtain the first participant location information; and enable display, on the display unit, of a modified location-sharing affordance. 
     In some embodiments, enabling the second participant to obtain the first participant location information is performed without adding a new message to the message transcript. 
     In some embodiments, the processing unit is further configured to: receive (e.g., with receiving unit  2114 ) an updated location of the first participant; and in response to receiving an updated location of the first participant: enable (e.g., with enabling unit  2112 ) the second participant to obtain the updated location of the first participant. 
     In some embodiments, enabling display of a modified location-sharing affordance comprises enabling replacement of the location-sharing affordance with the modified location-sharing affordance. 
     In some embodiments, the processing unit is further configured to: enable display (e.g., with enabling unit  2116 ), on the display unit, of a message compose field, wherein the message compose field comprises the modified location-sharing affordance. 
     In some embodiments, the processing unit is further configured to: detect (e.g., with detecting unit  2108 ) a message composition; and in response to detecting a message composition: discontinue display of the modified location-sharing affordance. 
     In some embodiments, the modified location-sharing affordance is a toggle. 
     The operations described above with reference to  FIGS.  20 A- 20 C  are, optionally, implemented by components depicted in  FIG.  1 A- 1 B,  3 ,  5 B , or  21 . For example, display operation  2002 , display operation  2004 , detect operation  2006 , and enable operation  2008  is implemented by event sorter  170 , event recognizer  180 , and event handler  190 . Event monitor  171  in event sorter  170  detects a contact on touch-sensitive display  112 , and event dispatcher module  174  delivers the event information to application  136 - 1 . A respective event recognizer  180  of application  136 - 1  compares the event information to respective event definitions  186 , and determines whether a first contact at a first location on the touch-sensitive surface corresponds to a predefined event or sub event, such as activation of an affordance on a user interface. When a respective predefined event or sub-event is detected, event recognizer  180  activates an event handler  190  associated with the detection of the event or sub-event. Event handler  190  optionally utilizes or calls data updater  176  or object updater  177  to update the application internal state  192 . In some embodiments, event handler  190  accesses a respective GUI updater  178  to update what is displayed by the application. Similarly, it would be clear to a person having ordinary skill in the art how other processes can be implemented based on the components depicted in  FIG.  1 A- 1 B,  3 ,  5 B , or  21 . 
     The foregoing description, for purpose of explanation, has been described with reference to specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings. The embodiments were chosen and described in order to best explain the principles of the techniques and their practical applications. Others skilled in the art are thereby enabled to best utilize the techniques and various embodiments with various modifications as are suited to the particular use contemplated. 
     Although the disclosure and examples have been fully described with reference to the accompanying drawings, it is to be noted that various changes and modifications will become apparent to those skilled in the art. Such changes and modifications are to be understood as being included within the scope of the disclosure and examples as defined by the claims. 
     As described above, one aspect of the present technology is the gathering and use of data available from various sources to improve the delivery to users of invitational content or any other content that may be of interest to them. The present disclosure contemplates that in some instances, this gathered data optionally includes personal information data that uniquely identifies or can be used to contact or locate a specific person. Such personal information data can include demographic data, location-based data, telephone numbers, email addresses, home addresses, or any other identifying information. 
     The present disclosure recognizes that the use of such personal information data, in the present technology, can be used to the benefit of users. For example, the personal information data can be used to deliver targeted content that is of greater interest to the user. Accordingly, use of such personal information data enables calculated control of the delivered content. Further, other uses for personal information data that benefit the user are also contemplated by the present disclosure. 
     The present disclosure further contemplates that the entities responsible for the collection, analysis, disclosure, transfer, storage, or other use of such personal information data will comply with well-established privacy policies and/or privacy practices. In particular, such entities should implement and consistently use privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining personal information data private and secure. For example, personal information from users should be collected for legitimate and reasonable uses of the entity and not shared or sold outside of those legitimate uses. Further, such collection should occur only after receiving the informed consent of the users. Additionally, such entities would take any needed steps for safeguarding and securing access to such personal information data and ensuring that others with access to the personal information data adhere to their privacy policies and procedures. Further, such entities can subject themselves to evaluation by third parties to certify their adherence to widely accepted privacy policies and practices. 
     Despite the foregoing, the present disclosure also contemplates embodiments in which users selectively block the use of, or access to, personal information data. That is, the present disclosure contemplates that hardware and/or software elements can be provided to prevent or block access to such personal information data. For example, in the case of advertisement delivery services, the present technology can be configured to allow users to select to “opt in” or “opt out” of participation in the collection of personal information data during registration for services. In another example, users can select not to provide location information for targeted content delivery services. In yet another example, users can select to not provide precise location information, but permit the transfer of location zone information. 
     Therefore, although the present disclosure broadly covers use of personal information data to implement one or more various disclosed embodiments, the present disclosure also contemplates that the various embodiments can also be implemented without the need for accessing such personal information data. That is, the various embodiments of the present technology are not rendered inoperable due to the lack of all or a portion of such personal information data. For example, content can be selected and delivered to users by inferring preferences based on non-personal information data or a bare minimum amount of personal information, such as the content being requested by the device associated with a user, other non-personal information available to the content delivery services, or publically available information.

Metadata:
Filing Date: 20220811
Publication Date: 20240910
Grant Date: 20240910
Priority Date: 20150814
Inventors: CHANG, JAE WOO
FROST, MEGAN M.
Dickens, Joshua B.
LEMAY, STEPHEN O.
VAN OS, MARCEL
DELLINGER, RICHARD R.
YANG, LAWRENCE Y.
Assignee: APPLE INC
CPC Classifications: [{"code": "H04L51/222", "inventive": true, "first": false, "tree": "[]"}, {"code": "Y02D30/70", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04W52/0209", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04W64/006", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04L51/08", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04L51/222", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04W52/0209", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04W4/14", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04W4/14", "inventive": true, "first": true, "tree": "[]"}, {"code": "Y02D30/70", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04W64/006", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04W52/0209", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04L51/222", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04L51/08", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04W4/14", "inventive": true, "first": true, "tree": "[]"}]
Family ID: 57994525