title: Subclassing NSView to have a transparent background
body: <p>I am creating an app where I need to have a transparent NSView with a transparent PNG image inside. The problem is, the NSView I'm drawing has a gray background on it. I have it subclassed (as TransparentRectangleView) but don't know what to put in drawRect to make it transparent.</p>
  
  <p>I have already overridden the isOpaque method to return NO but it doesn't seem to help...</p>
  
  <p>Alternatively, is there already a subclassed NSView that is similar to the iPhone's UIImageView (as long as I can add subviews inside, I need to add some text inside).</p>