IOS 5无法识别的选择器在setBackgroundImage的外观代理发送 [英] IOS 5 unrecognized selector send at appearance proxy for setBackgroundImage

问题描述

像许多开发人员一样，我正在使用IOS 5的新功能。

Like a lot of developers I am playing around with the new features of IOS 5.

我尝试使用外观代理来自定义我的应用程序。但在某些方法中我收到错误。

I tried to use appearance proxy's for customizing my App. But at some methods I get an error.

这有用：

[[UINavigationBar appearance] setBarStyle:UIBarStyleBlackTranslucent];
//and
[[UINavigationBar appearance] setTintColor:[UIColor greenColor]];

但是当我尝试：

[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"toolbar_background.png"]];

我收到一个无法识别的选择器错误：

I get an unrecognized selector error:

-[_UIAppearance setBackgroundImage:]: unrecognized selector sent to instance 0x153020
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[_UIAppearance setBackgroundImage:]: unrecognized selector sent to instance 0x153020'
*** First throw call stack:
(0x3107a8bf 0x3821f1e5 0x3107dacb 0x3107c945 0x30fd7680 0x2fe7 0x3304c7eb 0x330463bd 0x33014921 0x330143bf 0x33013d2d 0x33bffe13 0x3104e553 0x3104e4f5 0x3104d343 0x30fd04dd 0x30fd03a5 0x33045457 0x33042743 0x2f31 0x2ec8)
terminate called throwing an exception(gdb) 

任何想法？

推荐答案

该方法有一个不同的名称，你错过了它的一部分。由于iOS 5仍然在NDA下，我不会在这里引用或链接方法名称，但您可以自己查找：

The method has a different name, you're missing a part of it. Since iOS 5 is still under NDA, I won't cite or link the method name here, but you can look it up yourself:

• 转到 iOS开发人员中心。


• 选择 iOS SDK GM Seed 。


• 选择 iOS Developer Library 。


• 在搜索字段，开始输入 UINavigationBar 。


• 点击 UINavigationBar类参考链接。


• 阅读文档。

• Go to the iOS Dev Center.
• Select iOS SDK GM Seed.
• Select iOS Developer Library.
• In the search field, start typing UINavigationBar.
• Click on the UINavigationBar Class Reference link.
• Read the documentation.

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