ios - UIToolBar BarButtonItem IBAction 不起作用

Question

我已经使用 IB 向现有的 iPad 应用程序添加了 UIToolBar。然后我用 IB 将它连接到视图控制器并验证连接是否存在。但是，当我单击按钮时，视图控制器中的相应代码并未执行。

我打开了一个空项目并遵循相同的程序，一切都按预期工作。

我很好奇是否对我现有项目中阻止执行 IBAction 代码的不同之处有什么想法？

我正在使用 XCode 4.5.2 和 iOS 6.0（模拟器）进行开发。

任何想法都会受到赞赏，因为我真的很困惑！

Answer 1

As casillic mentioned in the comments, I had this problem due to the UITapGestureRecognizer I was using this to listen for when the user tapped the background so I could dismiss the keyboard if the user is editing a field.

The UITapGestureRecognizer conflicts with the toolbar and causes the code to not be executed when a toolbar item is selected - instead (in my case) it runs the "dismiss keyboard" code I have in my listener for the tab gesture.

To get around this, I added my gesture recogniser to the housing UIScrollView for the text inputs instead of the main containing view.

e.g:

replaced this:

[self.view addGestureRecognizer:tap];

with this:

[scrollView addGestureRecognizer:tap];

(scrollView is hooked up as an IBOutlet for the UIScrollView on my storyboards)