How do I replicate the Record Button in iOS

I want to replicate the record button with the glowing red middle from 开发者_JS百科the iOS camera app. Is it available via some framework? Has someone already implemented it?

Inside a button you and add UIImageView as a subview and animate when you want it to glow.

To do animation using UIImageView please follow this article. It has source code and sample project implementation.

http://appsamuck.com/day2.html