send in-app messages
get device orientation
add an AdMob in your cocos2d games
hang app and restore from background
calculate span between two Times in NSString
show number on an app icon
hide keyboard while clicking the background
3 ways to generate random numbers
resolve JSON string with original support in SDK
get device shake event
usage of NSNotificationCenter
check network flow of: 3G/GPRS/WIFI
check phone number legally with regex tool
make effect on texts of wrapping with white
limit input length of UITextField
get device capture, return UIImage*
save image automatically, jpeg for demo, support jpeg，gif，bmp，png
load image from URL
convert HEX color format into UIColor
make a phone call in-app