title: tvOS button update constraints on focus inside a Uiview?
body: <p>I have a custom uiView where it has two buttons. I just want to be able to change the height&amp; width of the button when it becomes or leaves focus</p>
  
  <pre><code>override func didUpdateFocus(in context: UIFocusUpdateContext, with coordinator: UIFocusAnimationCoordinator) {
  
  
       if context.nextFocusedView == noButton{
           print("About to be a lot of no in here")
           coordinator.addCoordinatedAnimations({
  self.yesButton.widthAnchor.constraint(equalToConstant: 360).isActive = true
  self.yesButton.heightAnchor.constraint(equalToConstant: 140).isActive = true
  self.yesButton.layoutIfNeeded()
           }) {
  self.noButton.widthAnchor.constraint(equalToConstant: 400).isActive = true
  self.noButton.heightAnchor.constraint(equalToConstant: 860).isActive = true
  self.noButton.layoutIfNeeded()
           }
  
  
  
       }
  
       if context.nextFocusedView == yesButton{
           coordinator.addCoordinatedAnimations({
               self.noButton.widthAnchor.constraint(equalToConstant: 360).isActive = true
               self.noButton.heightAnchor.constraint(equalToConstant: 140).isActive = true
               self.noButton.layoutIfNeeded()
           }) {
               self.yesButton.widthAnchor.constraint(equalToConstant: 400).isActive = true
               self.yesButton.heightAnchor.constraint(equalToConstant: 160).isActive = true
               self.yesButton.layoutIfNeeded()
           }
       }
  
   }
  </code></pre>
  
  <p>I just can't figure out why I can't get this to change the button height/width. I know I'm doing something wrong(and pardon if stupid.</p>