Create an UIButton with "push button" appearance?

I want to create a button with the same look and开发者_高级运维 feel as the "Timer" function in the builtin Clock app, but it really eludes me how to do it. By looking at the source code for UICatalog, it seems to create these buttons you need to create a custom bitmap. Is this true?

If so, is there a "standard" bitmap that can be used, to ensure consistent user experience?

Have a look at the Three20 library, it was developed for the facebook application and is now opensource. It provides a method for creating custom styles for your apps controls

http://www.three20.info

alt text http://www.three20.info/gfx/overview/styledviews.png