title: The constraint does not take effect on View
body: <p>I got a problem in storyboard. I added a View in an ViewController, after adding constraint, there were some misplaced views, the output was correct, but after fixing the misplaced views, the constraint did not work ,and the View's frame changed to <code>CGRectMake(0,0,1000,1000)</code>.</p>
  
  <p>The code is on <a href="https://github.com/oahgnehzoul/learn-Animation" rel="nofollow">https://github.com/oahgnehzoul/learn-Animation</a></p>