title: label.isHidden = false does not appear, Swift
body: <p>I have a UIView containing label and some other elements. At some point I need to toggle the visibility of the UIView, but I need other constraints to stay to keep the overall structure just without this UIView. I'm doing it with the height constraint of the UIView - make it 0. When toggling back, the UIView appears back (because other elements appear), but without the label. Label is not present at all.</p>
  
  <pre><code>if(vips.count == 0) {
          meetingVIPsLabel.isHidden = true
          meetingVipsHeight.constant = 0
          meetingVIPsLabel.text = ""
      } else {
          meetingVipsHeight.constant = 92
          meetingVIPsLabel.isHidden = false
          meetingVIPsLabel.text = MessagesInteractor.getMeetingVIPsMessage(with: vips.count)
      }
  </code></pre>
  
  <p>Before hiding the UIView ("Meeting 1 VIP" is what I need to appear):
  <a href="https://i.stack.imgur.com/bCyMI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bCyMI.png" alt="enter image description here"></a></p>
  
  <p>After hiding the UIView and bringing it back:
  <a href="https://i.stack.imgur.com/gpZqn.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gpZqn.png" alt="enter image description here"></a></p>