Get Updates By E-mail 

Subscriber Counter
Article Written By:
Johann Dowa

What are Objective-C categories?

Hi everybody,

I got a couple of e-mails asking what Objective-C categories are, as a couple of developers ran into them when looking up stuff using the jump to definition, research assistant and help in Xcode.

I didn’t explain them in my first Objective-C tutorial as they are not too identical to something that already exists in C/C++ or Java, and they are not neccessary to use in your code.

However they are frequently used by Apple so you will run into them in your code, so in this video I explain the details, and talk about why you might want to use Categories in your code.

Please post any other questions you may have below.

Submit A Resource

Have you created a useful tutorial, library or tool for iOS development that you would like to get in front of our 300,000+ monthly page views from iOS developers?

You can submit the url here.

The resources we feel will appeal to our readers the most will be posted on the front page.

Comments