override func viewDidLoad() {
        super.viewDidLoad()
//        給一張圖片新增一個顏色相框
        let image = UIImage(named:"cat")
        let imageView = UIImageView(image: image)

        imageView.frame = CGRect(x: 24, y: 80, width: 150, height:200)
        imageView.layer.borderWidth = 10
        imageView.layer.borderColor = UIColor.lightGray.cgColor
        self.view.addSubview(imageView)
        
}