title: Where to add subviews in UIScrollView
body: <p>Is there some "best-practice" way to add subviews to a <code>UIScrollView</code>?</p>
  
  <p>For Example:</p>
  
  <p>I have a <code>UIViewController</code> which loads images with corresponding description from a server.
  Those <em>images+descriptions</em> should be added in a horizontal scrollView.</p>
  
  <p>When the data is loaded, should I create a method in my <code>UIView</code> to handle this stuff,
  or is it more convenient to do this in my <code>UIViewController</code>?</p>