Objective C interfaces, delegates, and protocols

Question

So I\'m trying to wrap my head around Objctive-C interfaces, delegates and protocols. So I have a question:

Does a delegate have to be in a separate file or can it

Answer 1

I would suggest checking out:

The Objective-C 2.0 Programming Language

It should have the answer to most of your questions about protocols and interfaces.

Protocols

Interfaces

As far as delegates, they can be a new object or the object in which you are creating the thing needing a delegate. Files don't really have anything to do with it.