用Xcode 8中的按鈕移動圖像

我正在嘗試在Xcode 8中移動圖片。我有它的代碼，但按下按鈕時圖像不會移動。有人可以幫助我解決圖片不移動的問題。用Xcode 8中的按鈕移動圖像

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. 
    } 
    */ 

}

來源

2017-01-07 QUINN

你最初在哪裏設置你的'UIImageView'的框架？ – toddg

您是否對imageView設置了任何約束？ – shallowThought

'buttonPressed'函數中的代碼是否執行？您可以在該行上放置一箇中斷點，以查看應用程序是否停留在該中斷點，如果不是，那麼機會就是您的按鈕的'onTouchUpInside'事件未連接。 – Zhang