title: How can I have an opaque UIView as a subview of a semi-transparent UIView?
body: <p>I have a UIView with an alpha of 0.5 which I add as a subview to my primary view in order to gray-out everything else.  I want to add an additional UIView to this gray UIView as a subview - the problem is that when I do this, my newly-added subview is also partially transparent.</p>
  
  <p>Is there any way to make a subview "ignore" the alpha value of its superview and be itself fully opaque?</p>