UIToolbar项目消失 - ios6中的奇怪的错误 [英] UIToolbar items disappear - Weird bug in ios6

问题描述

这是当前的设置。

我有navigationController的工具栏有5个按钮，点击它们隐藏工具栏2秒，然后再次显示工具栏（除了第5个按钮 - 具有按钮的操作表（ACTION& CANCEL））。

I have the navigationController's toolbar with 5 buttons, and tapping on them hides the toolbar for 2 seconds, and then shows the toolbar again (except the 5th button - which brings up an actionsheet with buttons (ACTION & CANCEL)).

点击1-4按钮时，我会执行 self.navigationController.toolbarHidden = YES; ，并在 2秒后，我设置 self.navigationController.toolbarHidden = NO; 回到工具栏，一切都很好。

On tapping on the 1-4 buttons, I do a self.navigationController.toolbarHidden = YES; and after exactly 2 seconds, I set the self.navigationController.toolbarHidden = NO; and this brings back the toolbar, and everything's fine.

点按第5个按钮即可显示操作表。

On tapping the 5th button, which brings up action sheet.

1. 我点击CANCEL actionsheet => actionSheet dismissed =>工具栏很好。


2. 如果我点击ACTION按钮，我做一个 self.navigationController.toolbarHidden = / code>和2秒后... self.navigationController.toolbarHidden = NO;
但现在...工具栏按钮是GONE。



进一步调查...

我可以看到toolbarutton 的值设置为0.

I can see the the toolbarButtons seem to have their alpha values set to 0.

我不知道为什么设置工具栏项目的alpha在操作表操作后，value = 0。

I have no idea why the toolbar items' alpha are set to value = 0 after actionsheet operation.

任何人都可以告诉我这个的根本原因？

Can anyone tell me the root cause for this?

推荐答案

你试过将工具栏项数组设置为nil？我有这个相同的问题，原来是，当你设置工具栏的项目时，检查一下似乎工作：

Have you tried setting the toolbar items array to nil? I had this same problem and it turned out that putting a check around when you set the toolbar's items seemed to work:

if ([self.navigationController.toolbar.items count] > 0) {
   [self.navigationController.toolbar setItems:nil];
}

[self.navigationController.toolbar setItems:toolbarItems]; //toolbarItems is your array of UIBarButtonItems.

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