title: runtime expansion of uitableview footerview using autolayout
body: <p>I have a UIView that is a footerview of a uitableview. At run time, the user enters text into a uitextview within the footerview that should adjust to the size of the text content with a height constraint in autolayout.</p>
  
  <p>All other objects in the view (labels, imageviews) have appropriate constraints to accommodate the expansion of the textview. </p>
  
  <p>HOWEVER the height of the overall footerview will not change size, and it is impossible to use autolayout on the tableview footerview height.</p>
  
  <p>Does anyone have a solution? Thanks</p>