Add a "shine" effect to any view via the UIView(MDCShineEffect) category.
You can see more examples of usage in the SampleApp.
- QuartzCore
- CoreImage
This concept (and the code itself) was heavily influenced by Ben Schierman and his NSScreencast on the matter. If you haven't heard of NSScreencast, I highly recommend you subscribe. As far as OS X/iOS development resources go, it's the best money you'll ever spend.