title: UIImageView and UIButton Background Image turns black when loaded in simulator
body: <p>I have two UIImageViews I am adding to different scenes, and they are turning black. If I change the image name and re-upload them to image.xcassets, the problem is fixed for a some builds but then it appears again.</p>
  <p>Screenshots</p>
  <p><a href="https://i.stack.imgur.com/WPZ3b.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WPZ3b.png" alt="enter image description here" /></a>
  <a href="https://i.stack.imgur.com/3vnCY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3vnCY.png" alt="enter image description here" /></a></p>
  <p>There should be a play button where the black box is, and the Score and Highscore underlined things should be white not black.</p>
  <p>Score label image code</p>
  <pre><code>class GameOverScene : SKScene {
  
  var scoreImgView : UIImageView!
  
  override func didMoveToView(view : SKView) {
      //Score Image Label
      let scoreLabel2 = &quot;scorez2.png&quot;
      let scoreImage = UIImage(named: scoreLabel2)
      scoreImgView = UIImageView(image: scoreImage)
      scoreImgView.frame = CGRect(x: 0, y: 0, width: view.frame.size.width / 1.8, height: view.frame.size.height / 8)
      scoreImgView.center = CGPoint(x: view.frame.size.width / 2, y: view.frame.size.height / 3.2)
      scoreImgView.contentMode = UIViewContentMode.ScaleAspectFit
      view.addSubview(scoreImgView)
  
  }
  }
  </code></pre>
  <p>Retry Button/Play Button Code</p>
  <pre><code>class GameScene: SKScene {
  
  var restartButton : UIButton!
  var retryButton : UIImage = UIImage(named: &quot;playbutton.png&quot;)!
  
   override func didMoveToView(view : SKView) {
  
      //Restart Button
      restartButton = UIButton(frame: CGRect(x: 0, y: 0, width: view.frame.size.width / 3.2, height: 50))
      restartButton.center = CGPoint(x: view.frame.size.width / 2, y: view.frame.size.height / 1.25)
      restartButton.setImage(retryButton, forState: UIControlState.Normal)
      restartButton.contentMode = UIViewContentMode.ScaleAspectFit
      restartButton.addTarget(self, action: Selector(&quot;Restart&quot;), forControlEvents: UIControlEvents.TouchUpInside)
      self.view?.addSubview(restartButton)
  }
  }
  </code></pre>
  <p>Edit:
  All the images are in Images.xcassets. Is this the wrong place to put them?
  <a href="https://i.stack.imgur.com/qmvEb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qmvEb.png" alt="enter image description here" /></a></p>
  <p>EDIT:
  The images show up fine on an iPhone 5s.</p>