blocks|key|1146152|text|我从willAnimateFirstHalfOfRotationToInterfaceOrientation:duration:方法改为willAnimateRotationToInterfaceOrientation:duration:方法，并且警告消失了。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1146153|谢谢。|1146154|entityMap^0|2|1Q|1W|1F|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

I changed from <code>willAnimateFirstHalfOfRotationToInterfaceOrientation:duration:</code> method to <code>willAnimateRotationToInterfaceOrientation:duration:</code> method and warning gone. 

Thanks.

blocks|key|1361198|text|埃德·马蒂的答案是正确的。如果您没有覆盖任何旋转动画，则会发生这种情况的原因可能是您对shouldAutorotate回答了“是”。对于某些视图。如果根本不实现旋转，那么就不应该覆盖shouldAutorotate。方法。如果您确实覆盖了该方法，那么只需覆盖单步旋转方法并将其传递给超级。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1361199|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|$]]

Ed Marty's answer is the correct one. The reason it will happen if you are not overriding any of the rotation animation is probably that you reply "YES" to shouldAutorotate.. for some view. If you do not implement rotation at all, then you should just not override the shouldAutorotate.. method. If you do override that method, then just override the single step rotation method as well and pass it along to the super.

blocks|key|1146279|text|如果你正在使用iOS+4，并且你收到了这个警告，我找到了一种方法来摆脱它。在您的info.plist中，有一项称为“支持的接口方向”。选择您的应用程序支持的方向，当启动imagePicker时，两阶段警告将消失。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1146280|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|$]]

If you're using iOS 4 and you're getting this warning, I found a way to get rid of it. In your info.plist, there is an item called "Supported interface orientations." Select which orientations your application supports and two-stage warnings will go away when bringing up the imagePicker.

blocks|key|1361292|text|@plumiscles的答案对我来说不是很有效--没有名为“支持的接口方向”的项目，可能是b/c，它是一个旧项目。但是，您可以通过直接编辑.plist文件并添加以下内容来获得相同的效果：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1361293|+<key>UIInterfaceOrientation</key>
++<string>UIInterfaceOrientationPortrait</string>|code-block|syntax|javascript|1361294|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|$]]

@plumiscles answer didn't quite work for me - there was no item called 'Supported Interface Orientations', probably b/c it is an old project. But you can get the same effect by editing the .plist file directly and adding this: 

<pre><code> &lt;key&gt;UIInterfaceOrientation&lt;/key&gt;
 &lt;string&gt;UIInterfaceOrientationPortrait&lt;/string&gt;
</code></pre>

blocks|key|1146472|text|需要添加UIImagePickerController作为子视图来解决此错误|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1146473|[self.view+addSubview:picker.view];
[self+presentModalViewController:picker+animated:NO];|code-block|syntax|javascript|1146474|entityMap^0|4|N|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Need to add <code>UIImagePickerController</code> as a subview to solve this error

<pre><code>[self.view addSubview:picker.view];
[self presentModalViewController:picker animated:NO];
</code></pre>

blocks|key|1361670|text|在创建了一个没有视图控制器(没有标签)的tabs控制器后，我遇到了这个问题，一旦我将至少一个视图控制器附加到它上面，这个警告就消失了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1361671|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|$]]

I've had this issue after creating a tabbarcontroller with no view controllers inside (no tabs), this warning disappeared once I attached at least one view controller to it.

blocks|key|1361357|text|我并没有重写这些两步函数中的任何一个，但是当我收到orientationChanged通知时，我正在调用我自己的函数，并且我有下面这行代码。注释掉它摆脱了警告，并允许自动旋转正常工作。在iOS+4.2之前，Auto+rotate仍然可以使用这行代码，然后它完全崩溃了。我花了很多时间寻找为什么内置的autoRotate在4.2中停止工作。也许这对其他人有帮助。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1361358|注释掉这一行以使其工作：|1361359|[[UIApplication+sharedApplication]+setStatusBarOrientation:currentOrientation+animated:YES];|1361360|entityMap^0|P|I|0|0|0|2K|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|K|$]]

I wasn't over riding any of those two-step functions, but I was calling my own function when I received <code>orientationChanged</code> notifications, and I had this line of code in it. Commenting it out got rid of the warning and allowed the auto rotate to work properly. Auto rotate still worked with this line of code until iOS 4.2, then it broke completely. Spent a lot of time looking for why the built in autoRotate stopped working in 4.2. Maybe this will help someone else.

Commented out this line to make it work: 
<code>[[UIApplication sharedApplication] setStatusBarOrientation:currentOrientation animated:YES];</code>

blocks|key|1146505|text|我已经从plist中删除了“支持的接口方向”行，并且警告消失了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1146506|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|$]]

I've delete from plist "Supported interface orientations" row and warning disappears.

blocks|key|1361568|text|我也有同样的问题。在我的情况下，这是一个愚蠢的错误，我放在这里，以防其他人陷入同样的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1361569|在我的选项卡式应用程序中，我删除了一个原始的ViewControllers，并添加了一个新的带有故事板的设置，以创建一个“设置”部分。|1361570|这个新的VC必须是一个表视图VC，甚至我设计、编译和运行它都没有问题，当我改变应用程序的方向时，我一直收到这个“使用两阶段旋转动画”的错误。|1361571|我的问题是我忘记在原始的.h文件接口"UIViewController“中更改为"UITableViewController”。|1361572|完成此操作后，我在Storyboard身份徽章上将类从一般值更改为我的SettingsViewController，这就结束了。|1361573|我希望它能帮助其他人。我花了一段时间才弄清楚这件事。|1361574|干杯,|1361575|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|S|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|T|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|U|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|V|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|O|$]]

I just had the same problem. In my case was a silly mistake that I'm putting here just in case anyone else falls into that same issue.

In my tabbed app I remove one of the original ViewControllers and added a new one with Storyboard to create a "Settings" section.

This new VC had to be a table view VC and even I designed, compiled and run it without a problem, when I changed the orientation of the app I kept getting this “Using two-stage rotation animation” error.

My problem was that I forgot to change in the original .h file interface "UIViewController" for "UITableViewController".

Once this was done I changed on the Storyboard identity badge the class from the general value to my SettingsViewController and that was the end of it.

I hope it can help someone else. It took me a while to get to bottom of this.

Cheers,

What are single-state and two-stage animation for rotating an iPhone window?

This is the "error" message I get in the Debugger Console (nothing crashes):

<pre><code>Using two-stage rotation animation. To use the smoother single-stage animation, this application must remove two-stage method implementations.
</code></pre>

I was working through the book "Beginning iPhone Development: Exploring the iPhone SDK" by Apress (Dave Mark, Jeff LaMarche) on the Swap Project.

Single-Stage vs Two-Stage Animation for iPhone Apps?

调试器

旋转iPhone窗口的单状态动画和两阶段动画是什么？这是我在调试器控制台中得到的“错误”消息(没有崩溃)：Using two-stage rotation animation. To use the smoother single-stage animation, this application must remove two-stage method implementations.我正在阅读

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