swift button點擊事件

////  ViewController.swift// 按鈕//import UIKitclass ViewController: UIViewController {    override func viewDidLoad() {        super.viewDidLoad()        // ️SWIFT 提倡：        // Replace 'Selector("buttonTap")' with '#selector(ViewController.buttonTap)'        // button  點擊無參數        let button = UIButton(frame: CGRect(x: 0, y: 0, width: 50, height: 30))        button.backgroundColor = UIColor.yellow        button.addTarget(self, action: #selector(ViewController.buttonTap), for: UIControlEvents.touchUpInside)        //button1：點擊有參數        let button1 = UIButton(frame: CGRect(x: 100, y: 0, width: 50, height: 30))        button1.backgroundColor = UIColor.yellow        button1.addTarget(self, action: #selector(buttonTap1(button:)), for: UIControlEvents.touchUpInside)        self.view.addSubview(button)        self.view.addSubview(button1)    }    //selector 其實是 Objective-C runtime 的概念    @objc func buttonTap() {        print("buttonTap")    }    @objc func buttonTap1(button:UIButton) {        print("buttonTap參數")    }}