具有自定义视图的UIButton - addTarget：action：forControlEvents：不起作用

Question

我的按钮如下

1. 创建label1
2. 创建label2
3. 创建了customView（UIView）
4. 在自定义视图
上添加了label1和label2
5. 创建了myCustomButton（UIButton）
6. 在myCustomButton上添加了customView

我已经为custom_View，label1和label2完成了userInteractionEnable。

然后添加

[myCustomButton addTarget:self action:@selector(OnButtonClick:) forControlEvents:UIControlEventTouchUpInside];

并且

-(void)OnButtonClick:(UIButton *)sender
{
}

但即使我按下按钮，上面的功能也从未被调用过。任何解决方案？

Answer 1

我的朋友对您的代码只是一个小问题，您只需要在代码中添加一行，忘记setUserInteractionEnabled:NO到UIView它将允许您点击按钮

UILabel *lbl1 = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 30)];
[lbl1 setText:@"ONe"];
UILabel *lbl2 = [[UILabel alloc] initWithFrame:CGRectMake(0, 30, 100, 30)];
[lbl2 setText:@"Two"];

UIView * view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 130)];
[view setUserInteractionEnabled:NO];

[view addSubview:lbl1];
[view addSubview:lbl2];

UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn addSubview:view];
[btn setFrame:CGRectMake(0, 0, 200, 130)];
[btn addTarget:self action:@selector(click) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:btn];

点击方法

-(void)click
{
    NSLog(@"%s",__FUNCTION__);
}

Answer 2

不是创建customView（UIView的实例），而是将customView添加为UIControl的实例，也将addTarget添加到customView，

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setFrame:CGRectMake(10,10,300,300)];

UIControl *customView = [[UIControl alloc] initWithFrame:CGRectMake(0,0,300,300)];
[customView addTarget:self action:@selector(customViewClicked:) forControlEvents:UIControlEventTouchUpInside]; 

UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake(10,10,100,100)];
[label1 setText:@"Hello How are you ?"];

UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake(10,150,100,100)];
[label1 setText:@"I am fine Thnank You!"]

[customView addSubView:lebel1];
[customView addSubView:lebel2];

现在在CustomViewClicked方法

中

-(void)customViewClicked:(id)sender
{
     UIControl *senderControl = (UICotrol *)sender;

     NSLog(@"sender control = %@",senderControl);
}

希望它会对你有所帮助。

Answer 3

Swift 4.2解决方案

这是Swift的最新版本的问题的解决方案（基于先前的答案）：

func customButton() {

    // Label Creation
    let firstLabel = UILabel(frame: CGRect(x: 0, y: 0, width: 100, height: 30))
    firstLabel.text = "first"

    let secondLabel = UILabel(frame: CGRect(x: 0, y: 30, width: 100, height: 30))
    secondLabel.text = "second"

    // Custom View creation
    let viewFrame = CGRect(x: 0, y: 0, width: 100, height: 60)
    let customView = UIView(frame: viewFrame)
    customView.addSubview(firstLabel)
    customView.addSubview(secondLabel)
    customView.isUserInteractionEnabled = false

    // Custom button
    let button = UIButton(type: .custom)
    button.frame = viewFrame
    button.addSubview(customView)

    button.addTarget(self, action: #selector(click), for: .touchUpInside)
    addSubview(button)
}

@objc
func click() {
    print("Click")
}

注意事项：绝对需要禁用customView的用户交互，因为它是添加在顶部的，最终会干扰我们想要捕捉的点击手势。

为更清楚地看到这一点，只需在调试时使用“ Debug View Hierarchy”：