MAConfirmButton is an animated subclass of UIButton that replicates and improves upon the behavior of the AppStore “Buy Now” buttons. Built and animated with Core Animation layers, it is completely image free.
OBGradientView is a simple UIView wrapper for CAGradientLayer. It is a plain UIView whose layer is a CAGradientLayer. It is useful if using a view is more convenient than using a layer, e.g. because you want to use autoresizing masks.