在didFinishLaunchingWithOptions结束之前是否曾调用applicationWillResignActive？

问题描述

在应用程序之前调用 applicationWillResignActive：的情况是否会发生：didFinishLaunchingWithOptions： 结束？

Can a scenario happen where applicationWillResignActive: will be called before application:didFinishLaunchingWithOptions: ends?

基本上，我可以依靠应用程序：didFinishLaunchingWithOptions：始终完成在之前第一次触发applicationWillResignActive ？

Basically, can I count on application:didFinishLaunchingWithOptions: to always be done before applicationWillResignActive is triggered for the first time?

推荐答案

Apple的 ，表示 applicationWillResignActive：作为您的应用程序通过处理运行循环来处理事件，该循环仅在应用程序：didFinishLaunchingWithOptions：完成后开始。

Apple's iOS App Programming Guide in the "App States and Multitasking" Section, indicates applicationWillResignActive: is called as part of your application's handling of events through processing the run loop, which only begins after application:didFinishLaunchingWithOptions: has finished.

此外，应用程序生命周期事件总是发生在主线程上，因此其中一个事件不可能先抢占另一个或与每个事件并行运行其他。

Furthermore, application lifecycle events always happen on the main thread, so it wouldn't be possible for one of them to pre-empt the other or run in parallel with each other.

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