通過Xcode 8中的按鈕移動圖像

Question

我正在嘗試在Xcode 8中移動圖片。我有相應的代碼，但是當按下按鈕時圖像不會移動。 有人可以幫我解決圖片不動的問題嗎？

import UIKit

class Level2ViewController: UIViewController {


 var image = UIImage(named: "ballon.png")

     var imageView = UIImageView(image: "ballon")//initialize properly, this is just for reference



    @IBAction func buttonPressed(_ sender: UIButton) {

            self.imageView.frame.origin.x += 50

    }


    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */

}