Merge pull request #78 from heyongjian/ios-style

Ios style
Merge pull request #80 from heyongjian/ios-style

Ios style
fix bug:issue-35, when push two same push detail, the statusbar shows two notifications.

do not show the second notification.
Merge pull request #158 from whuthm/ios-style

fix bug:issue-35, when push two same push detail, the statusbar shows two notifications.