UIButton的addtarget：触摸后没有调用！

问题描述

我有以下代码，当我按下UIButton时，没有任何内容被调用，它也不会崩溃。

I have the following code, and when i press the UIButton, nothing is called, and it doesn't crash.

    calloutButton = [[UIView alloc] initWithFrame:CGRectMake(left_width2*2-3, 5, 230, 230)];
    UIButton *buttongo= [UIButton buttonWithType:UIButtonTypeDetailDisclosure];

    buttongo.frame=CGRectMake(0, -1, 25, 25);
    [buttongo addTarget:self action:@selector(buttonEvent:) forControlEvents:UIControlEventTouchUpInside];
    [calloutButton addSubview:buttongo];

    [label addSubview:calloutButton];




    -(IBAction)buttonEvent:(id)sender
    {
          NSLog(@"Hello...");
    }

有人知道为什么？

谢谢！

推荐答案

检查标签的大小，它可以是CGSizeZero，但因为子视图的剪辑是NO默认情况下，按钮是可见的，但不可触摸。

Check the size of the label, it can be CGSizeZero, but because the clipping of subviews is NO by default so the button is visible, but it isn't touchable.

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