Yeah, except you can add properties, though you have to do it with objc_(s|g)etAssociatedObject https://developer.apple.com/library/ios/documentation/Cocoa/Ref

Yeah, except you can add properties, though you have to do it with objc_(s|g)etAssociatedObject https://developer.apple.com/library/ios/documentation/Cocoa/Reference/ObjCRuntimeRef/Reference/reference.html https://developer.apple.com/library/ios/documentation/Cocoa/...