title: Autolayout vertical spacing of group of textlabels when one is empty
body: <p>I have a group of text labels that are vertically spaced to each other <strong>15 pixels</strong>.
  <a href="https://i.stack.imgur.com/sHKEg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sHKEg.png" alt="enter image description here"></a></p>
  
  <p>The problem is that when one of the labels is empty, then there is extra space between the other two labels above and below the empty one (30 pixels).</p>
  
  <p>I know that one solution would be to constraint all the text labels to the top and to the labels above and then I can just delete it and everything should look aligned but the problem is that I reuse the view and sometimes all the labels have text and sometimes some are empty. So if I delete the label, I would have to recreate it and readjust the constraints manually.</p>
  
  <p><strong>Is there a way to delete the extra vertical spacing when one of the labels is empty without deleting it?</strong></p>
  
  <p><strong>Edit 1:</strong> The labels don't have any <strong>Height</strong> constraint so the empty one will be 0 pixels high </p>
  
  <p><strong>Edit 2:</strong> I need to support iOS7+</p>