blocks|key|1195869|text|不应该没有区别。也许你又犯了个错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1195870|请参阅iOS+5.0+to+5.1+API+Diffs|offset|length|1195871|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/library/ios/#releasenotes/General/iOS51APIDiffs/index.html#//apple_ref/doc/uid/TP40011328^0|0|3|O|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

No there should be no difference. Perhaps you have another mistake.. 
See <a href="https://developer.apple.com/library/ios/#releasenotes/General/iOS51APIDiffs/index.html#//apple_ref/doc/uid/TP40011328">iOS 5.0 to 5.1 API Diffs</a>

blocks|key|2079183|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2079184|+重要:只有在必要时才应该设置该属性，并且应该确保在不再需要时将其重置为NO。大多数应用程序应允许系统在空闲计时器结束时关闭屏幕。这包括音频应用程序。在适当使用音频会话服务的情况下，当屏幕关闭时，播放和录制将不间断地进行。唯一应该禁用空闲计时器的应用程序是映射应用程序、游戏或具有零星用户交互的类似程序。|blockquote|offset|length|style|BOLD|2079185|2079186|2079187|也许你超过了清醒的时间限制？|2079188|entityMap^0|0|1|47|0|0|0|0|E|0^^$0|@$1|2|3|-4|4|5|6|N|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|O|7|@$D|P|E|Q|F|G]]|8|@]|9|$]]|$1|H|3|-4|4|5|6|R|7|@]|8|@]|9|$]]|$1|I|3|-4|4|5|6|S|7|@]|8|@]|9|$]]|$1|J|3|K|4|5|6|T|7|@$D|U|E|V|F|G]]|8|@]|9|$]]|$1|L|3|-4|4|5|6|W|7|@]|8|@]|9|$]]]|M|$]]

<blockquote>
 Important: You should set this property only if necessary and should be sure to reset it to NO when the need no longer exists. Most
 applications should let the system turn off the screen when the idle
 timer elapses. This includes audio applications. With appropriate use
 of Audio Session Services, playback and recording proceed
 uninterrupted when the screen turns off. The only applications that
 should disable the idle timer are mapping applications, games, or
 similar programs with sporadic user interaction.
</blockquote>

Maybe You exceeds the allowable time limit of being awake?

blocks|key|1195907|text|如果您的应用程序是为某些背景任务注册的，例如GPS位置更新，则工作正常。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1195908|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|$]]

Works fine if your application is registered for some background task, for example GPS location updating.

blocks|key|1195913|text|[[UIApplication+sharedApplication]+setIdleTimerDisabled:+YES];|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1195914|在iOS+5.1上为我工作|unstyled|1195915|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>[[UIApplication sharedApplication] setIdleTimerDisabled: YES];
</code></pre>

worked for me on iOS 5.1

blocks|key|1195926|text|只是将[UIApplication+sharedApplication].idleTimerDisabled+=+YES;设置为|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1195927|-+(BOOL)+application:(UIApplication*)application+didFinishLaunchingWithOptions:(NSDictionary*)launchOptions|code-block|syntax|javascript|1195928|对我来说很管用。然而，有一个警告。我注意到，每次我调用相机实用程序来拍摄快照时，idleTimerDisable都会被设置为NO。所以在上传图片之后，我不得不再次调用以下代码行：|BOLD|1195929|[UIApplication+sharedApplication].idleTimerDisabled+=+YES;|1195930|如果有更多的地方需要同样的策略，我也不会感到惊讶。到目前为止，这种方法对我来说是没有问题的。|1195931|entityMap^0|3|1M|0|0|14|G|1Q|2|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|W|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|X|8|@$9|Y|A|Z|B|M]|$9|10|A|11|B|M]]|D|@]|E|$]]|$1|N|3|O|5|H|7|12|8|@]|D|@]|E|$I|J]]|$1|P|3|Q|5|6|7|13|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|S|$]]

Just setting <code>[UIApplication sharedApplication].idleTimerDisabled = YES;</code> in 

<pre><code>- (BOOL) application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
</code></pre>

works well for me. However, there is a caveat. I have noticed that every time I invoke camera utility to take a snapshot, idleTimerDisable gets set to NO behind the scene. So right after I upload my image, I had to call the following line of code again: 

<pre><code>[UIApplication sharedApplication].idleTimerDisabled = YES;
</code></pre>

I would not be surprised if there are more places throughout that require same strategy. So far this approach has worked without issues for me.

blocks|key|1195937|text|我知道它很古老，但我发现它很好，在斯威夫特你可以这样做|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1195938|application.idleTimerDisabled+=+true|offset|length|style|CODE|1195939|谢谢你的回答！我现在使用xcode+7+Beta+3(+Swift+2)|1195940|entityMap^0|0|0|10|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

i know its is old, but i found this good and in Swift you can do it look a like this

<code>application.idleTimerDisabled = true</code>

Thanks for you answers! i use right now xcode 7 Beta 3 ( Swift 2 )

blocks|key|1165967|text|对于Swift，我使用它在委托之外执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1165968|++++UIApplication.sharedApplication().idleTimerDisabled+=+true|code-block|syntax|javascript|1165969|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|$]]

For Swift, I use this to do outside of delegate: 

<pre><code> UIApplication.sharedApplication().idleTimerDisabled = true
</code></pre>

The following line of code prevents the app from automatically locking the screen after some idle time.

<pre><code>[UIApplication sharedApplication].idleTimerDisabled = YES; //write this in applicationDidFinishLaunching
</code></pre>

It works well till iOS 5.0.
But iOS 5.1 does not respect this line and locks the screen after some idle time.
How to solve this irritating issue?

Thanks.

Edit:

The same code works fine when its installed in 5.0.1 device. But I dont know why it is not working with 5.1 device.

Disable automatic screen lock in iOS 5.1

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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下面的代码行防止应用程序在空闲时间后自动锁定屏幕。[UIApplication sharedApplication].idleTimerDisabled = YES; //write this in applicationDidFinishLaunching它在iOS 5.0之前运行良好。但是iOS 5.1不尊重这一行...

问禁用iOS 5.1中的自动屏幕锁定
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