Creating Custom Shaped UIButtons
Creating custom shaped buttons is something done in many iPhone apps. Often times this is done through using a completely custom button class, however, it can be done through subclassing UIButton allowing for much easier implementation.
Jeff Lamarche illustrates this technique here: Irregularly Shaped UIButtons
Ole Begemann has also created a custom button class which he talks about here: OBShapedButton: Non-rectangular buttons on the iPhone.
[Source: Jeff LaMarche's Blog, Ole Begemann's Blog]
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