title: UIScrollView and Constraints
body: <p>I'm trying to place a UIImageView at the top of a UIScrollView and when I constrain the UIScrollView to the sides of the View Controller and constrain the UIImageView to the top and make the width of the UIImageView equal to the UIScrollView it makes the UIImageView way wider than the UIScrollView, and much taller than expected.  Any idea what I'm doing wrong?</p>
  
  <p>Storyboard:</p>
  
  <p><img src="https://i.stack.imgur.com/xQvor.png" alt="Storyboard"></p>
  
  <p>Preview:</p>
  
  <p><img src="https://i.imgur.com/fIaJmqu.png" alt="Preview"></p>