September 22, 2010
Mark Dalrymple: Stay Out Of Apple's Namespace.
"I've been noticing a disturbing trend lately. A friend asked me recently, 'Would naming your own Objective class prefix with NS be an issue with Apple or that is just not good in general?'."
tldr; Don't prefix your methods and classes with NS or CF or something else Apple uses. You'll just get stepped on at some point.