如何使用UIButtonBarItem触发方法? [英] How to trigger methods with UIButtonBarItem?

问题描述

我有一个带有工具栏的xib，在那上面我有2个按钮，都是用IB制作的.我可以将插座连接到按钮，但是单击它们时不会触发该方法吗?为什么会这样?

I have a a xib with a toolbar and on that I have 2 buttons all made in IB. I can connect my outlets to the buttons but when I click them the method isn't triggered? Why is that?

在我的头文件中，我有这个:

In my header file I have this:

@property (nonatomic, retain) IBOutlet UIBarButtonItem *cancelEntry;
@property (nonatomic, retain) IBOutlet UIBarButtonItem *saveEntry;

-(IBAction) cancelEntry:(id) sender;
-(IBAction) saveEntry:(id) sender;

在我的.m文件中，我得到了:

In my .m file I got this:

-(IBAction) cancelEntry:(id) sender {
 NSLog(@"cancel");
}

-(IBAction) saveEntry:(id) sender {
 NSLog(@"save");
}

所有编译均应按原样进行，但单击按钮时日志中什么也没有.我应该怎么做才能使其正常工作?

All compiles as it should but no nothing in the log when clicking the buttons. What should I do to get it to work?

推荐答案

听起来就像您将插座连接到按钮，但未将按钮连接到动作.

Sounds like you connected your outlets to the buttons, but didn't connect the buttons to the actions.

1. 右键单击"Interface Builder"中的 UIBarButtonItem .
2. 将鼠标悬停在选择器上，然后将显示在文件所有者上的+拖动.
3. 将其连接到cancelEntry:.
4. 重复保存.

代替在您的IBAction中使用(id)，您应该使用(UIBarButtonItem *).这样可以防止您将其他对象类型连接到那些IBAction.

Instead of using (id) for your IBActions, you should probably use (UIBarButtonItem *). That'll prevent you from connecting a different object type to those IBActions.

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