What is “category” in Objective-C?

Question

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How does a category work in Objective-C?

I am just getting started with Objective-C and w

Answer 1

There is a section in the Objective-C 2.0 programming Language document about Categories and Extensions.

As you are just getting started it's a good doc to have on hand to look things up.

There is also a section on Categories in the Cocoa Core Competencies document, which is easier to get started with, and also has a lot of useful information for the beginner.