"Purple" was one of the code names for the first iPhone - http://allthingsd.com/20120803/apples-scott-forstall-on-how-project-purple-turned-into-the-iphone/ htt

"Purple" was one of the code names for the first iPhone - http://allthingsd.com/20120803/apples-scott-forstall-on-how-project-purple-turned-into-the-iphone/ http://allthingsd.com/20120803/apples-scott-forstall-on-how-... I've seen PurpleEventCallback show up in different stacks.