title: UILabel inside a UIToolbar using IB is invisible on run, how fix?
body: <p>I want to show a total inside a toolbar. I put in IB the UILabel on top of the toolbar .</p>
  
  <p>However, when I run the app, the UILabel is totally invisible (but can set values on code fine).</p>
  
  <p>The most bizarre thing is that in other form, all work fine. I don't see why in one form work but not in another...</p>
  
  <p>Any idea in how fix this? Or why is this behaviour happening?</p>