title: Setting up this UI with Auto Layout
body: <p>I'm trying to set up a view with Auto Layout so that it animates nicely when the view changes size...</p>
  
  <p>The scenario is...</p>
  
  <p>I have a <code>UIView</code> with a subView called <code>animView</code>. <code>animView</code> starts outside of the frame of the view.
  As the view grows (gets taller), the <code>animView</code> moves down at the same rate.
  When the <code>animView</code> is 10 points from the top of the view (i.e. @"V:|-10-[animView]" ) it stops and "sticks" to that point.</p>
  
  <p>i.e. something like this...</p>
  
  <p><img src="https://i.stack.imgur.com/HDY4r.jpg" alt="enter image description here"></p>