如何在UINavigationController中获取弹出视图的通知？ [英] How to get notified of popped view in UINavigationController?

问题描述

当我们到达某个 UIViewController UINavigationController 后面的按钮时，我想执行一个动作>。

I want to perform a action when the user pressed the back button on my UINavigationController when arrived at a certain UIViewController.

不幸的是，它看起来像 UINavigationControllerDelegate 没有任何方法可以通知视图的弹出。

Unfortunately it looks like UINavigationControllerDelegate doesn't have any methods to get notified of the popping of views.

作为一种解决方法，我现在在 viewDidDisappear 方法中的操作，只有当$ code>动画是 YES 。这是有用的，但这有点丑陋。

As a workaround I now have in the viewDidDisappear method my action, that only gets fired when animated is YES. This works, but it's a bit ugly.

我该怎么做？

推荐答案

当viewWillDisappear或在某些UIViewController的viewWillAppear上设置逻辑时，您可以调用委托方法。

You can either call a delegate method when viewWillDisappear or set logic on viewWillAppear for certain UIViewController.

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