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The Structure of an App

The Structure of an App

作者: winnisz | 来源:发表于2017-03-14 17:46 被阅读0次

The Structure of an App

UIApplication object:the heart of every iOS app

to facilitate the interactions between the system and other objects in the app

传达key app transitions and some special events

App delegate object:the heart of your custom code

handle app initialization, state transitions, and many high-level app events

mvc模式----使得app  can run on different devices with different screen sizes

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