如何知道当dismissModalViewControllerAnimated何时启动，以及何时完成？ [英] How to know when dismissModalViewControllerAnimated is initiated and also when it is done?

问题描述

有一种方法知道dismissModalViewControllerAnimated何时启动，什么时候完成（例如viewWillAppear和viewDidAppear的习语）？

Is there a way to know when the dismissModalViewControllerAnimated is initiated and when it is completed (such as the idiom for viewWillAppear and viewDidAppear)? Unlike other animations, this one doesn't seem to have a delegate that tells you.

推荐答案

是的，比你想象的更容易

Yes, and easier than you think.

当dismissModalViewControllerAnimated：被调用时，底层视图（即将出现的视图）将收到一个viewWillAppear消息和一个viewDidAppear消息。

When dismissModalViewControllerAnimated: is called, the underlying view (the one about to appear) will receive a viewWillAppear message and a viewDidAppear message.

注意：请确保您的视图控制器正确连接或这些消息丢失。

Caveat: make sure your view controllers are hooked up properly or these messages get lost.

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