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UIKit is the UI framework in the IPhoneRuntime, the equivalent of AppKit for traditional OS X apps. Most of the classes are more or less equivalent to their NS- prefixed AppKit counterparts.

UIKit是iOS(iPad/iPhone运行的操作系统)上的AppKit 的变种，用于为iOS 应用程序提供界面对象和控制器。与AppKit 类似，UIKit 框架有UIResponder，也采用事件(UIEvent类)机制。另外，iOS上的应用程序都是一个UIApplication 实例。下表为UIKit上的一些常用对象类。

The UIKit framework provides the classes needed to construct and manage an application’s user interface for iOS. It provides an application object, event handling, drawing model, windows, views, and controls specifically designed for a touch screen interface. Figure I-1 illustrates the classes in this framework.

詞條貢獻者： WuWilson  
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