buddingmonkey/SpriteKit-Components — pull request #7 by nacrossweb (2014-03-09 03:47:33+00:00)
Title: Fixed bug where node was not unregistered on exit from scene

I found that update continued to be called for nodes that had been removed from the scene after having called removeFromParent on the node. I think it was originally a typo so I have updated registerComponentNode to unregisterComponentNode which corrects this behaviour and prevents update from being called after the node has been removed from the scene.