问题描述
我遇到的问题是我的UIBack按钮没有出现，我不确定是什么导致它。
i'm having a problem with my UIBackbutton not appearing and i'm not sure what is causing it.
这是我制作后退按钮图像的代码，它在我的第一个ViewController中：
This is my code for making the back button image, it is in my first ViewController :
UIImage *backButtonHomeImage = [[UIImage imageNamed:@"backButtonImage"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonHomeImage forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
当你第一次进入下一个视图（由一个按钮的segue完成）时，按钮不是可见，但返回的文字是可见的。一旦我点击后退按钮，图像就会出现，下次我点击它时就会出现。
When you first enter the next view (done by a segue from a button) the button isn't visible but the text to go back is visible. Once i've hit the back button the image appears and it stays appeared on the next time i click it.
我不确定这是否是一个问题要做使用我的代码，或者它所在的文件，或者它是否和iOS 7有问题。
I'm not sure if this is an issue to do with my code, or the file it's in or if it's and iOS 7 problem.
推荐答案
使用UIBarButtonItem可能会有更多的运气显式设置后退按钮背景。
You may have more luck using a UIBarButtonItem and setting the back button background explicitly.
外观代理在我自己尝试使用iOS 7的后退按钮时一直不可靠。我遇到了同样的问题背景没有正确显示第一次显示按钮。
The appearance proxy has been unreliable in my own attempts to get a back button working with iOS 7. I experienced the same issue with the background not showing up properly first time showing the button.
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