添加按钮(swift)

• 1.定义button

// Button
class MyButton: UIButton {
    var onClick: () -> () = { _ in () }
    @objc func tapped(sender: AnyObject) {
        onClick()
    }
}

func button(text: String,onClick: () -> ()) -> UIButton {
    let b = MyButton(type: .Custom)
    b.userInteractionEnabled = true
    b.frame = CGRect(x: 0,y: buttonOffset,width: 200,height: 30)
    b.backgroundColor = UIColor.grayColor()
    b.setTitle(text,forState: .normal)
    b.addTarget(b,action: "tapped:",forControlEvents: UIControlEvents.TouchUpInside)
    b.onClick = onClick
    return b
}

• 2.使用

self.view.addSubview(button("Add health point",onClick: { () -> () in print("click") }))