PRTween

PRTween is an open source and lightweight tweening library built for iOS that aims to be as simple as possible, without sacrificing flexibility.

Although Apple has done an incredible job with Core Animation and UIView Animations, there are some cases that are difficult to get around.

PRTween is a great solution if would like to:
· Animate a property Core Animation won't allow you to
· Tween arbitrary numerical values, such as sound volume, scroll position, a counter, or many others
· Ensure that [someView layoutSubviews] is respected during an animation
· Define your timing curve as a function rather than a bezier with control points

Detailed instructions on how to use the PRTween iOS library within your own project are available HERE.

Requirements:

· Apple Xcode