ObjCSteeringBehavior Steering behavior example at <<AdvanceEDActionScriptAnimation>> with abstracted interfaces and marshaling implementation by Objective-C language. Reference https://developer.apple.com/library/prerelease/ios/documentation/GraphicsAnimation/Conceptual/SpriteKit_PG/Introduction/Introduction.html Flash version https://github.com/yangboz/as3SteeringBehavior Swift version https://github.com/yangboz/SwiftSteeringBehavior