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I am confused about what the difference is between a protocol and an interface? They both seem to be doing the same thing?
Is it like abstract in C# in that you are required to implement it?
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An interface defines how two entities may communicate. A protocol defines how they should communicate and what that communication means.
Objective-C allows you to define protocols, which declare the methods expected to be used for a particular situation. This chapter describes the syntax to define a formal protocol, and explains how to mark a class interface as conforming to a protocol, which means that the class must implement the required methods.
In Objective-C, protocols are declared with the “@protocol” keyword. Below is an example of declaring a protocol containing one required method. In Swift, the syntax is a little different but the idea is the same. In Objective-C, you add the protocol name in angle brackets beside the class interface declaration.
Interface and Implementation In Objective C, the file where the declaration of class is done is called the interface file and the file where the class is defined is called the implementation file.
a protocol in Objective-C is the same as an interface in java, if thats what you mean
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