title: UIView alpha = 0 causes touches to be dropped to the view below
body: <p>So I created a glass pane or a custom UIView to handle touches. This glass pane sits on top of other views such as dummy UIButtons. When I set the alpha to be 0, the touches actually get intercepted by the views underneath the glass view. This is wrong. However, when I set the alpha to a low value like 0.2, the glass pane intercepts the touches.</p>
  
  <p>The alpha setting was done in Interface Builder.</p>
  
  <p>Anybody know how to set to the alpha to 0 and still get have this glass pane intercept touches?</p>