title: Navigation Bar Item stretching image for button
body: <p>I have setup a Navigation Bar in a storyboard with an UIBarButton for the right. </p>
  
  <p><img src="https://i.stack.imgur.com/m19rJ.png" alt="enter image description here"></p>
  
  <p>This is the code I use to update the image for this:</p>
  
  <pre><code>// Setup the right navigation bar item
  [self.addGameButton setBackgroundImage:[UIImage imageNamed:@"addGameButton"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
  [self.addGameButton setTitle:@""];
  </code></pre>
  
  <p>The image is here, it is 76x58 (at 2x). It is 38x29 (at normal).
  <img src="https://i.stack.imgur.com/V9Zt5.png" alt="enter image description here"></p>
  
  <p>When run on the device the image is stretching and I do not know why?
  <img src="https://i.stack.imgur.com/Gnco5.png" alt="enter image description here"></p>