title: Wierd behaviour for UIButton setHighlighted after the button is set selected
body: <p>My question is simple: I am creating a UIButton with resources for normal, disabled, selected and highlighted, in other words, all the controls I have access to. The problem is that, if for some reason I choose to set the button to be selected, and afterwards I tap on it, none of the resources I've set is shown. </p>
  
  <p><code>setSelected = YES</code>  Correct resource
  <code>setHightlighted = YES</code> Correct resource
  <code>setNormal = YES</code> Correct resource
  etc.</p>
  
  <p>I've verified all the resources and everything is in order. I'm not changing the state of the button in an <code>IBAction</code>, so that is not the case here.</p>
  
  <p>Again, the weird appearance happens when the button is selected and I tap on it (like a highlight version of the selected state - if that makes any sense). How do I have access to this part? Or what do I have to do for this not to happen</p>