blocks|key|826422|text|这些被称为：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|826423|-+(void)viewDidAppear:(BOOL)animated
-+(void)viewDidDisappear:(BOOL)animated

-+(void)viewWillAppear:(BOOL)animated
-+(void)viewWillDisappear:(BOOL)animated|code-block|syntax|javascript|826424|http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIViewController_Class/Reference/Reference.html|offset|length|826425|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|39|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|T|8|@]|9|@$I|U|J|V|1|W]]|A|$]]|$1|K|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|H]]]]

These are called :

<pre><code>- (void)viewDidAppear:(BOOL)animated
- (void)viewDidDisappear:(BOOL)animated

- (void)viewWillAppear:(BOOL)animated
- (void)viewWillDisappear:(BOOL)animated
</code></pre>

<a href="http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIViewController_Class/Reference/Reference.html" rel="nofollow">http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIViewController_Class/Reference/Reference.html</a>

blocks|key|3188293|text|检查viewWillAppear和viewWillDisappear|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3188294|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIViewController_Class/Reference/Reference.html|1^0|2|E|0|H|H|1|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@$A|N|B|O|1|P]|$A|Q|B|R|1|S]]|C|$]]|$1|D|3|-4|5|6|7|T|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|K]]]]

Check <a href="http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIViewController_Class/Reference/Reference.html" rel="nofollow">viewWillAppear</a> and <a href="http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIViewController_Class/Reference/Reference.html" rel="nofollow">viewWillDisappear</a>

blocks|key|5085987|text|-+(void)viewWillDisappear:(BOOL)animated|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|5085988|和|unstyled|5085989|-+(void)viewDidDisappear:(BOOL)animated|5085990|我建议您看一下文档UIViewController类参考|offset|length|5085991|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIViewController_Class/Reference/Reference.html^0|0|0|0|9|G|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|V|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|F|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

<pre><code>- (void)viewWillDisappear:(BOOL)animated
</code></pre>

and

<pre><code>- (void)viewDidDisappear:(BOOL)animated
</code></pre>

I recomend you to take an look to the docs <a href="http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIViewController_Class/Reference/Reference.html" rel="nofollow">UIViewController</a> Class Reference

blocks|key|5086026|text|除了在其他答案中建议的回调之外，您还可以为UINavigationController设置委托并实现以下回调|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5086027|–+navigationController:willShowViewController:animated:
–+navigationController:didShowViewController:animated:|code-block|syntax|javascript|5086028|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In addition to the callbacks suggested in other answers, you can also set a delegate for your UINavigationController and implement the following callbacks

<pre><code>– navigationController:willShowViewController:animated:
– navigationController:didShowViewController:animated:
</code></pre>

My <code>UIViewControllers</code> are pushed inside a <code>navigationController</code>.What I want to know is...what method gets called when I go from the current UIViewController to the previous one or forward?

I checked with <code>viewDidUnLoad</code> but this doesn't get called.

Any idea?Thank you:)

what method gets called when you leave a view to go to another view or to the previous view

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我的UIViewControllers被推入一个navigationController.What中，我想知道当我从当前的is...what转到前一个或向前时，UIViewController方法会被调用吗？我向viewDidUnLoad查询过，但没有调用它。有什么想法吗?谢谢：)

问当您离开一个视图转到另一个视图或上一个视图时，会调用什么方法
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问当您离开一个视图转到另一个视图或上一个视图时，会调用什么方法EN