Why tack a protocol of NSObject to a protocol implementation

Question

I have been seeing some code around that resembles the following:

@protocol MyProtocol 
// write some methods.
@end

Is ther

Answer 1

I've never done that in my code, but I could see the advantage to it. If you pass a parameter as id you'll need to re-cast it if you want to call any of NSObject's methods on that object.