title: how to place a scrolling image behind a stationary image in Swift
body: <p>I am trying to port an artificial horizon app I wrote for a PC in c# to swift. It has a bezel image which does not move and behind it is a horizon image which can move up and down behind the bezel. The "window" part of the bezel is yellow so in c# I just made the yellow opaque. </p>
  
  <p>In swift I stated with the horizon inside of a UIScrollView but I'm not sure how to get that to work with a second image that should not scroll.</p>
  
  <p>Not all that up to speed on this swift stuff, can someone point me in the right direction?</p>