如何检查是否通过标签按下了uibutton？

Question

let button = UIButton(frame: CGRect(x: 1, y: 1, width: 50, height: 50))  
button.tag = 15  
view.addSubview(button) 

Answer 1

您应该添加目标按钮，如下所示：

button.addTarget(self, action: #selector(buttonPressed(_:)), forControlEvents: .TouchUpInside) 

而且功能可能是这样的：

func buttonPressed(sender: UIButton) { 
    if sender.tag == 15 { 
     // Code here 
    } 
} 

Answer 2

你可以做这样的事情：

func addANewButton() { 
    let button = UIButton(frame: CGRect(x: 1, y: 1, width: 50, height: 50)) 
    button.addTarget(self, action: #selector(action(_:)), for: UIControlEvents.touchUpInside) 
    button.tag = 15 
    view.addSubview(button) 
} 

func action(_ sender: UIButton) { 
    switch sender.tag { 
    case 15: //Do something 
    case 16: //Do something else 
    //Add as many cases you want... 
    default: break 
} 

只要您添加了目标的按钮，就会调用函数action被按下。