blocks|key|1396455|text|Objective-C：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1396456|self.navigationItem.hidesBackButton+=+YES;|offset|length|style|CODE|1396457|Swift：|1396458|navigationItem.hidesBackButton+=+true|1396459|entityMap^0|0|0|16|0|0|0|11|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@$D|P|E|Q|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|L|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|M|$]]

Objective-C: 
 <code>self.navigationItem.hidesBackButton = YES;</code>

Swift: 
 <code>navigationItem.hidesBackButton = true</code>

blocks|key|1611392|text|使用以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1611393|+self.navigationItem.backBarButtonItem=nil;|code-block|syntax|javascript|1611394|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|$]]

Use the code:

<pre><code> self.navigationItem.backBarButtonItem=nil;
</code></pre>

blocks|key|1611493|text|最好的方法是将它们组合在一起，这样即使您手动设置，它也会隐藏back按钮：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1611494|self.navigationItem.leftBarButtonItem=nil;
self.navigationItem.hidesBackButton=YES;|code-block|syntax|javascript|1611495|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|$]]

The best way is to combine these, so it will hide the back button even if you set it up manually : 

<pre><code>self.navigationItem.leftBarButtonItem=nil;
self.navigationItem.hidesBackButton=YES;
</code></pre>

blocks|key|1611538|text|在UIViewController的函数viewDidLoad中，使用以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1611539|self.navigationItem.hidesBackButton+=+YES;|code-block|syntax|javascript|1611540|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 the function viewDidLoad of the UIViewController use the code:

<pre><code>self.navigationItem.hidesBackButton = YES;
</code></pre>

blocks|key|1396724|text|不要忘记，您需要在具有nav控制器的对象上调用它。例如，如果您让导航控制器使用RootViewController推送选项卡栏控制器，则在RootViewController上调用self.navigationItem.hidesBackButton+=+YES将不会执行任何操作。实际上，您必须调用self.tabBarController.navigationItem.hidesBackButton+=+YES|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1396725|entityMap^0|2I|15|46|1M|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

Don't forget that you need to call it on the object that has the nav controller. For instance, if you have nav controller pushing on a tab bar controller with a RootViewController, calling <code>self.navigationItem.hidesBackButton = YES</code> on the RootViewController will do nothing. You would actually have to call <code>self.tabBarController.navigationItem.hidesBackButton = YES</code>

blocks|key|1611634|text|将此代码添加到视图控制器中|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1611635|UIView+*myView+=+[[UIView+alloc]+initWithFrame:+CGRectMake(0,+0,+300,+30)];
UIBarButtonItem+*btnL+=+[[UIBarButtonItem+alloc]initWithCustomView:myView];
self.navigationItem.leftBarButtonItem+=+btnL;|code-block|syntax|javascript|1611636|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|$]]

Add this code in your view controller

<pre><code>UIView *myView = [[UIView alloc] initWithFrame: CGRectMake(0, 0, 300, 30)];
UIBarButtonItem *btnL = [[UIBarButtonItem alloc]initWithCustomView:myView];
self.navigationItem.leftBarButtonItem = btnL;
</code></pre>

blocks|key|1396803|text|当我设置的时候，它并不是在所有的情况下都有效|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1396804|self.navigationItem.hidesBackButton+=是；|1396805|在viewWillAppear或ViewDidLoad中，但当我在viewController的初始化中设置它时，它工作得很好。|1396806|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

It wasn't working for me in all cases when I set 

self.navigationItem.hidesBackButton = YES;

in viewWillAppear or ViewDidLoad, but worked perfectly when I set it in init of the viewController.

blocks|key|1611676|text|试试这个-+self.navigationController?.navigationItem.hidesBackButton+=+true|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1611677|entityMap^0|6|1S|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

try this one - 
<code>self.navigationController?.navigationItem.hidesBackButton = true</code>

blocks|key|1611688|text|在c#或Xamarin.ios中，this.NavigationItem.HidesBackButton+=+true；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1611689|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In c# or Xamarin.ios,
this.NavigationItem.HidesBackButton = true;

blocks|key|1611702|text|self.navigationItem.setHidesBackButton(true,+animated:+true)|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1611703|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>self.navigationItem.setHidesBackButton(true, animated: true)
</code></pre>

I added a navigation control to switch between views in my app. But some of the views shouldn't have 'Back' (the previous title) button. Any ideas about how to hide the back button?

How to hide 'Back' button on navigation bar on iPhone?

Objective-C

Xamarin

Swift

我添加了一个导航控件来在我的应用程序的视图之间切换。但是有些视图不应该有'Back‘(上一个标题)按钮。关于如何隐藏“后退”按钮有什么建议吗？

问如何在iPhone上隐藏导航栏上的“后退”按钮？
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问如何在iPhone上隐藏导航栏上的“后退”按钮？
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