Swift UIButton(按钮)添加点击事件

    override func viewDidLoad() {
        super.viewDidLoad()
        //创建按钮 按钮类型为自定义
        let button = UIButton.init(type: .custom)
        //将按钮添加到视图中
        view.addSubview(button)
        button.backgroundColor = UIColor.red
        button.frame = CGRect.init(x: 100, y: 100, width: 200, height: 30)
        button.tag = 1
        //添加点击方式，不区分传参与不传参
        button.addTarget(self, action: #selector(tapped), for: .touchUpInside)
        
    }
    //按钮点击事件
    @objc func tapped(sender: UIButton) {
        print(sender.tag)
    }