title: How to setup a navigation bar with image?
body: <p>Something weird and frustrating is happening with the <code>UINavigationBar</code> on <code>iOS7</code>. I'm trying to add an image like this: </p>
  
  <pre><code>[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"Logo_Small.png"] forBarMetrics:UIBarMetricsDefault];
  </code></pre>
  
  <p>The result is that the lettering of my header -- the Hebrew letters -- repeat all over the navigation bar. </p>
  
  <p>I tried all four options for the <code>UIBarMetrics</code> flag, but with the other three the logo just disappears. I also set the image size to <strong>320x64</strong>, as per the documentation. But nothing seems to do the right thing, and I'm on the verge of giving up using a logo and just have a controller.title.  </p>