title: "class not found" shows up even though I did it before In another viewController but it doesn't work
body: <p>I get this message and a lot of the time I am following a tutorial and it is the exact same code yet it says it is wrong then I turn off my computer and it fixes itself, is this normal?   my issue right now is that it &quot;class not found&quot;</p>
  <p>I also move my file to use MVC but then it doesn't let me import UIKit and I have to remove it from the folder and then it works<a href="https://i.stack.imgur.com/Cst4v.jpg" rel="nofollow noreferrer">enter image description here</a></p>