UINavigationController 不弹出 UINavigationBar 项目

问题描述

当 UINavigationController 弹出视图控制器时，我的 UINavigationBar 没有弹出它的项目.

I'm having a problem where my UINavigationBar isn't popping it's items when the UINavigationController pops a view controller.

我查看了堆栈，观察到以下内容:

I have had a look at the stacks observed the following:

• 分配的导航控制器的预期数量(在仪器中签入)
• 堆栈中有正确数量的控制器.(调试日志记录)
• 导航项未弹出.(调试日志记录)

这就是我所做的.

我在调用 super 后在 viewDidLoad 方法中弹出了一些日志语句.

I popped some log statements into the viewDidLoad method after calling super.

NSLog(@"%@", [self navigationController]);
NSLog(@"%@", [[self navigationController] viewControllers]);
NSLog(@"%@", [[self navigationController] navigationBar]);
NSLog(@"%@", [[[self navigationController] navigationBar] items]);

加载初始视图后.

2009-10-09 16:42:51.706 Bob[11657:207] <UINavigationController: 0x243bb0>
2009-10-09 16:42:51.720 Bob[11657:207] (
    <MediaBrowser: 0x2354c0>
)
2009-10-09 16:42:51.742 Bob[11657:207] <UINavigationBar: 0x243e50; frame = (0 20; 320 44); autoresize = W; layer = <CALayer: 0x243ed0>>
2009-10-09 16:42:51.758 Bob[11657:207] (
    <UINavigationItem: 0x242d60>
)

一切看起来都不错.推动第二个控制器.

All looks good. Push the second controller.

2009-10-09 16:43:11.800 Bob[11657:207] -[MediaBrowser beginLoading] [Line 261] 
2009-10-09 16:43:12.320 Bob[11657:207] -[MediaBrowser loadingComplete] [Line 269] 
2009-10-09 16:43:12.587 Bob[11657:207] <UINavigationController: 0x243bb0>
2009-10-09 16:43:12.654 Bob[11657:207] (
    <MediaBrowser: 0x2354c0>,
    <MediaBrowser: 0x2c1cc0>
)
2009-10-09 16:43:12.685 Bob[11657:207] <UINavigationBar: 0x243e50; frame = (0 20; 320 44); autoresize = W; layer = <CALayer: 0x243ed0>>
2009-10-09 16:43:12.734 Bob[11657:207] (
    <UINavigationItem: 0x242d60>,
    <UINavigationItem: 0x2c63b0>
)

这里也没有什么意外的.推动第三个控制器.

Again nothing unexpected here. Push the third controller.

2009-10-09 16:43:19.934 Bob[11657:207] -[MediaBrowser beginLoading] [Line 261] 
2009-10-09 16:43:20.388 Bob[11657:207] -[MediaBrowser loadingComplete] [Line 269] 
2009-10-09 16:43:20.928 Bob[11657:207] <UINavigationController: 0x243bb0>
2009-10-09 16:43:20.962 Bob[11657:207] (
    <MediaBrowser: 0x2354c0>,
    <MediaBrowser: 0x2c1cc0>,
    <MediaBrowser: 0x4027e20>
)
2009-10-09 16:43:21.003 Bob[11657:207] <UINavigationBar: 0x243e50; frame = (0 20; 320 44); autoresize = W; layer = <CALayer: 0x243ed0>>
2009-10-09 16:43:21.039 Bob[11657:207] (
    <UINavigationItem: 0x242d60>,
    <UINavigationItem: 0x2c63b0>,
    <UINavigationItem: 0x4028880>
)

一切都好.现在让我们弹出一个控制器

All good. Now lets pop a controller

2009-10-09 16:43:26.935 Bob[11657:207] <UINavigationController: 0x243bb0>
2009-10-09 16:43:26.945 Bob[11657:207] (
    <MediaBrowser: 0x2354c0>,
    <MediaBrowser: 0x2c1cc0>
)
2009-10-09 16:43:26.964 Bob[11657:207] <UINavigationBar: 0x243e50; frame = (0 20; 320 44); autoresize = W; layer = <CALayer: 0x243ed0>>
2009-10-09 16:43:26.977 Bob[11657:207] (
    <UINavigationItem: 0x242d60>,
    <UINavigationItem: 0x2c63b0>,
    <UINavigationItem: 0x4028880>
)

嗯.出了点问题.控制器已弹出，但导航项仍然存在.咯咯笑，让我们再推一下.

Humm. Something is going amiss. The controller has popped but the navigation item is still there. For giggles lets push again.

009-10-09 16:44:05.878 Bob[11657:207] <UINavigationController: 0x243bb0>
2009-10-09 16:44:05.908 Bob[11657:207] (
    <MediaBrowser: 0x2354c0>,
    <MediaBrowser: 0x2c1cc0>,
    <MediaBrowser: 0x407eb00>
)
2009-10-09 16:44:05.951 Bob[11657:207] <UINavigationBar: 0x243e50; frame = (0 20; 320 44); autoresize = W; layer = <CALayer: 0x243ed0>>
2009-10-09 16:44:05.996 Bob[11657:207] (
    <UINavigationItem: 0x242d60>,
    <UINavigationItem: 0x2c63b0>,
    <UINavigationItem: 0x4028880>,
    <UINavigationItem: 0x407f280>
)

控制器堆栈看起来不错，导航项堆栈有很多麻烦.让我们最后一次弹出.

The controller stack looks good, the navigation item stack is in lots of trouble. Lets pop one last time.

2009-10-09 16:44:17.770 Bob[11657:207] <UINavigationController: 0x243bb0>
2009-10-09 16:44:17.776 Bob[11657:207] (
    <MediaBrowser: 0x2354c0>,
    <MediaBrowser: 0x2c1cc0>
)
2009-10-09 16:44:17.785 Bob[11657:207] <UINavigationBar: 0x243e50; frame = (0 20; 320 44); autoresize = W; layer = <CALayer: 0x243ed0>>
2009-10-09 16:44:17.793 Bob[11657:207] (
    <UINavigationItem: 0x242d60>,
    <UINavigationItem: 0x2c63b0>,
    <UINavigationItem: 0x4028880>,
    <UINavigationItem: 0x407f280>
)

所以控制器堆栈很好.另一方面，导航项存在一些问题.

So the controller stack is fine. Navigation items on the other hand have some issues.

我被难住了.我确定我在做一些奇怪/奇怪/错误的事情，但如果我能看到它，我该死.我要做的唯一操作是准备(通过我的控制器 navigationItem 属性)自定义 rightBarItem.

I'm stumped. I'm sure I'm doing something odd/weird/wrong but damn me if I can see it.The only manipulation i'm going is preparing (via my controllers navigationItem property) a custom rightBarItem.

如果你能做到这一点，谢谢.对我可能从这里去哪里的想法将不胜感激.

If you got this far, thanks. Thoughts on where I might go from here would be appreciated.

推荐答案

搞定了.

原来是我做了一些愚蠢的事情.

So it turns out that I was doing something stupid.

我在 NSMutableArray 的内部类别中添加了一个 pop 方法.该方法没有正确弹出.UINavigationBar 还必须向 NSMutableArray 添加一个 pop 方法.我的越野车赢得并打破了 UIBarItem 的流行.

I had added a pop method in an internal category to NSMutableArray. That method wasn't popping correctly. UINavigationBar must also add a pop method to NSMutableArray. My buggy one was winning and breaking the pop of the UIBarItem.

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