title: Sprite kit iOS 7 bodyWithPolygonFromPath error
body: <p>I am attempting to create a physics body around a sprite, but when using <code>bodyWithPolygonFromPath</code>, I got the error message "SKPhysicsBody: Error attempting to create polygon with 18 vertices, maximum is 12". I then tried to use a different option such as <code>bodyWithEdgeChainFromPath</code>, but those options didn't respond to gravity. I need to know how to get either gravity to work with <code>bodyWithEdgeChainFromPath</code>, or for it to be able create the polygon. </p>