A flexible Tab Bar implementation for iPhone and iPad
Objective-C Shell
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  • No backing or support images required to draw the tab bar interface. The bar, tab item selections and arrow indicator are implemented as CALayers.
  • Tab bar and tab items support two styles, a standard appearance a la UITabBar or with an arrow indicator a la Tweetie / Twitter).
  • UIImage category takes black images masks and renders with gray and blue selection gradients like UITabBar/UITabBarItem
  • Uses UIView block animations to respect the hidesBottomBarWhenPushed property on contained UIViewControllers.
  • Uses ObjC associatedObject API to associate tab items and the tab controller with contained view controllers.

In Progress

  • More Tab and customizable view controllers.
  • Badge count implementation layer.
  • Render Text labels for standard tab bar style.
  • Shadows on tab items and arrow indicator selection style.


  • Xcode 4.0.2 or greater and iOS SDK 4.3.x or greater




May 7, 2011 - Updated for Xcode 4

January 30, 2011 - Public release

License and Copyright

BuildKit is BSD licensed. The full text of the license is located in Documents/License.md