UIButton - unwanted background well

I'm creating UIButtons (type = UIButtonTypeCustom) with a custom background drawn by an artist; unfortunately UIButton is adding an unwanted 'well' effect around the backgroundImage (as specified via setBackgroundImage). Is there a way to disable the well? It's not a simple drop shadow, so messing with the CALayer properties doesn't开发者_运维百科 seem to help. I realise I could use UIControl, but that's considerably more work, since I need to handle the label subview myself, and get the artist to produce highlighted versions of the artwork - UIButton is doing all that nicely, if I could only disable the well effect.

Put your image inside a UIImageView, and then position your UIButton on top of it. Use the "custom" style, which has no UI to it at all and is totally invisible.

If you want to change ("highlight") your button image when the button is hit, just change the image contained in the UIImageView in whatever method your UIButton targets.