Difference between C# partial classes and Objective C categories?

Question

I am new to Objective C. having spent couple of months in iOS, I am struggling to understand usage of Objective C categories.

Are they same as C# partial classes and used to divide huge classes in to methods pertaining to a piece of requirement.

OR there is more to it than just this much ?

Answer 1

Objective-C categories are a way to add methods to existing classes. They can be compared to .NET extension methods.

The Apple documentation is pretty comprehensive about categories, so I suggest you to read it to fully understand the benefits.

Note: One advantage of categories over extension methods, is that you can add both instance and static methods to a class.