IPhone UI development skills article Tabbar Arrow TabBarAnimation, select learning IOS programming source code, a good reference.

TabBarAnimation
...............\.DS_Store
...............\chat.png
...............\chat@2x.png
...............\Classes
...............\.......\FirstViewController.h
...............\.......\FirstViewController.m
...............\.......\TabBarAnimationAppDelegate.h
...............\.......\TabBarAnimationAppDelegate.m
...............\compose-at.png
...............\compose-at@2x.png
...............\FirstView.xib
...............\main.m
...............\MainWindow.xib
...............\messages.png
...............\messages@2x.png
...............\more.png
...............\more@2x.png
...............\README.md
...............\SecondView.xib
...............\TabBarAnimation-Info.plist
...............\TabBarAnimation.xcodeproj
...............\.........................\lexliu-mac.mode1v3
...............\.........................\lexliu-mac.pbxuser
...............\.........................\project.pbxproj
...............\TabBarAnimation_Prefix.pch
...............\TabBarNipple.png
...............\TabBarNipple@2x.png
__MACOSX
........\._TabBarAnimation
........\TabBarAnimation
........\...............\._.DS_Store
........\...............\._chat.png
........\...............\._chat@2x.png
........\...............\._Classes
........\...............\._compose-at.png
........\...............\._compose-at@2x.png
........\...............\._FirstView.xib
........\...............\._main.m
........\...............\._MainWindow.xib
........\...............\._messages.png
........\...............\._messages@2x.png
........\...............\._more.png
........\...............\._more@2x.png
........\...............\._README.md
........\...............\._SecondView.xib
........\...............\._TabBarAnimation-Info.plist
........\...............\._TabBarAnimation_Prefix.pch
........\...............\._TabBarNipple.png
........\...............\._TabBarNipple@2x.png
........\...............\Classes
........\...............\.......\._FirstViewController.h
........\...............\.......\._FirstViewController.m
........\...............\.......\._TabBarAnimationAppDelegate.h
........\...............\.......\._TabBarAnimationAppDelegate.m

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