title: ios - How to auto-resize my view in storyboard? swift 3
body: <p>I try to auto-resize my view with auto-layout contraints, but I have some errors of Y-position missing. I can't understand what is wrong, I attached my Y-position to the top of the view.</p>
  
  <p>Thanks for your help, here is the screenshot:</p>
  
  <p><img src="https://i.stack.imgur.com/dIkP3.png" alt="Contraints error"></p>