title: Image vs Background image for UIButton
body: <p>I have an image that is 480x331 and has a transparent background.  The transparent part is just around the image's edges.  My UIButton is 72x37.  When I set the image as a background image in IB for the button, the transparent edges of the image show as white in the button.  Without an image, the button is white with rounded corners.  I'm guessing that is the white I see coming through.  If so, it means the image transparency is working but the button's white area is showing through.</p>
  
  <p>If I set the image to the UIButton's Image property, it doesn't scale correctly, even after changing view mode, and remains at its full size.</p>
  
  <p>Any suggestions on which property I should use to get the scaling and transparency to work right?</p>