title: Sprite Kit. SKSpriteNode not appearing on iPhone 4 but appears on 4S
body: <p>I am creating a game using sprite kit. Everything works and looks great on all devices (including 4S) except on the iPhone 4.</p>
  
  <p>All devices are running on the latest iOS 7.</p>
  
  <p>Everything else seems to be working fine on the iPhone 4. Its just the background image sprite. That appears black instead. </p>
  
  <p>My thoughts are that it is there but positioned off screen.</p>
  
  <p>here is my code for adding in the background...</p>
  
  <pre><code>//bgImage
      bgImage = [SKSpriteNode spriteNodeWithImageNamed:@"BG_1"];
      bgImage.position = CGPointMake(self.size.width/2, self.size.height/2);
      bgImage.zPosition = 0;
      [self addChild:bgImage];
  </code></pre>
  
  <p>Question 1: As far as screens go, aren't the iPhone 4 and 4S the same? same size and both retina?</p>
  
  <p>Question 2: Does anyone know of any reason, why this is happening?</p>