Steering behavior example at <<AdvanceEDActionScriptAnimation>> with abstracted interfaces and marshaling implementation by Swift language.
- Reference
http://www.raywenderlich.com/76147/uikit-dynamics-tutorial-swift
http://java.dzone.com/articles/using-swift-and-sprite-kit?mz=27249-mobile
- Objective-C version
https://github.com/yangboz/ObjCSteeringBehavior
- Flash version