title: How to have non scrolling content in a UIScrollView
body: <p>I need something like this</p>
  
  <pre><code>+ scrollview
  |
  |__ moving content
  |
  |__ non moving content
  </code></pre>
  
  <p>The tricky part is that I'm modifying an existing piece of code where I can't use the
  scrollview parent to set the "non moving content" as it's child. The non moving content
  must be a scrollview child. I was thinking of attaching it to the background view but
  I don't know how to access the UIScrollview's background view.</p>