@IBOutlet var img_guanggao: UIImageView!
    override func viewDidLoad() {
        super.viewDidLoad()
        let imgClick = UITapGestureRecognizer(target: self, action: #selector(imAction))
        img_guanggao.addGestureRecognizer(imgClick)
        //開啟 isUserInteractionEnabled 手勢否則點選事件會沒有反應
        img_guanggao.isUserInteractionEnabled = true
 

    }

 //點選事件方法
 @objc func imAction() -> Void {
        print("圖片點選事件")
 }