大佬教程收集整理的这篇文章主要介绍了Objective-C – 从iOS 4到iOS 5的应用启动方法的差异？，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
在iOS 4中,-application：didFinishLaunchingWithOptions：方法中的所有内容在启动后首先执行.执行该方法后,加载了第一个选项卡的视图控制器.
因此,当我记录我的启动应用程序进程(运行iOS 4.3的模拟器)时,它看起来像这样：
-[AcandoAppDelegate application:didFinishLaunchingWithOptions:] [Line 35] didFinishLaunchingWithOptions method running -[AcandoAppDelegate application:didFinishLaunchingWithOptions:] [Line 60] This should be executed first // And it does as it should -[AcandoAppDelegate applicationDidBecomeActive:] [Line 254] applicationDidBecomeActive method running -[SeminarsViewController viewDidLoad] [Line 58] 2 - viewDidLoad method running -[SeminarsViewController viewDidLoad] [Line 60] This should be executed second // Also as it should -[SeminarsViewController viewWillAppear:] [Line 123] 3 - viewWillAppear method running -[SeminarsViewController viewDidAppear:] [Line 173] viewDidAppear running
现在,当我记录我的启动应用程序进程(运行iOS 5.0的模拟器)时,它看起来像这样：
-[AcandoAppDelegate application:didFinishLaunchingWithOptions:] [Line 35] didFinishLaunchingWithOptions method running -[SeminarsViewController viewDidLoad] [Line 58] 2 - viewDidLoad method running -[SeminarsViewController viewDidLoad] [Line 60] This should be executed second // So this should be executed second but is executed first -[SeminarsViewController viewWillAppear:] [Line 123] 3 - viewWillAppear method running -[AcandoAppDelegate application:didFinishLaunchingWithOptions:] [Line 60] This should be executed first // and this is executed second but should be executed first -[AcandoAppDelegate applicationDidBecomeActive:] [Line 254] applicationDidBecomeActive method running -[SeminarsViewController viewDidAppear:] [Line 173] viewDidAppear running
我错过了一些明显的东西吗？对我来说,看起来我们在iOS 4和iOS 5之间有两种不同的启动情况？
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