UINavigationController没有弹出UINavigationBar项 [英] UINavigationController not popping UINavigationBar items

问题描述

我遇到一个问题，当UINavigationController弹出一个视图控制器时，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.

我看过所观察到的堆栈以下内容：

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

• 分配的预期导航控制器数量（在仪器中检查）


• 堆栈上的控制器数量正确。 （调试日志记录）


• 未弹出导航项。 （调试日志记录）

这就是我的所作所为。

我弹了一些调用super后，将语句记录到viewDidLoad方法中。

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>
)

此处没有任何意外。推第三个控制器。

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>
)

一切都很好。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>
)

Humm。有些事情不对劲。控制器已弹出但导航项仍然存在。对于咯咯笑，我们再次推。

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，导航项目有一些问题。

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

我很难过。我确定我正在做一些奇怪/奇怪/错误的事情，但是如果我能看到它就该死我。我要做的唯一操作就是准备（通过我的控制器navigationItem属性）一个自定义的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.

如果你走得这么远，谢谢。关于我可能会离开这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

Nailed it。

Nailed it.

所以事实证明我做了一些愚蠢的事。

So it turns out that I was doing something stupid.

我在内部类别中添加了一个pop方法给NSMutableArray 。该方法没有正确弹出。 UINavigationBar还必须向NSMutableArray添加pop方法。我的越野车赢了并打破了UIBarItem的流行音乐。

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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