subView的touchesBegan：withEvent：选择器未调用

发布于 2024-11-30 12:13:16 字数 1002 浏览 0 评论 0原文

在下面的代码中，我创建了一个 MTLabel 对象和一个 UIButton 对象，更改了它们的框架，然后添加 UIButton 作为 'MTLabel' 的子

MTLabel* label = [MTLabel labelWithTitle:title];
label.frame = ...
UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
[rightButton addTarget:self
                action:@selector(didSelectStore:)
      forControlEvents:UIControlEventAllEvents];
[label addSubview:rightButton];
rightButton.frame = ...;
[an addLabel:label];

视图两个 UIView 都出现在屏幕上，但是触摸 rightButton 时永远不会调用 didSelectStore:。

由于 MTLabel 是在第三方库中定义的，因此我没有它的源代码。所以我写了一个这样的类别：

@implementation MTLabel(button)
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [super touchesBegan:touches withEvent:event];
}
......
@end

这样做之后，仍然没有调用 [rightButton TouchesBegan:event:] ，更不用说那个动作了。

因此触摸事件在该子视图中没有按预期工作。

知道如何发生以及我应该做什么吗？

谢谢。

原文

In the following code, I created a MTLabel object and a UIButton object, changed their frame, then add UIButton as subView of 'MTLabel'

MTLabel* label = [MTLabel labelWithTitle:title];
label.frame = ...
UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
[rightButton addTarget:self
                action:@selector(didSelectStore:)
      forControlEvents:UIControlEventAllEvents];
[label addSubview:rightButton];
rightButton.frame = ...;
[an addLabel:label];

After that both UIViews appears on screen, howeverdidSelectStore: is never called when touching that rightButton.

As MTLabel is defined in a third-party lib, I don't have it's source code. So I write a category like this:

@implementation MTLabel(button)
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [super touchesBegan:touches withEvent:event];
}
......
@end

After doing that, [rightButton touchesBegan:event:] is still not called, not mention that action.

So the touch events are not working as expected in that subView.

Any idea on how then happen and what should I do?

Thank you.

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