September 2002
Intermediate to advanced
1272 pages
31h 12m
English
Content preview from Cocoa® Programming
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Apple’s Extensions
No standard exists for the Objective-C language and runtime. The Apple and Gnu implementations of Objective-C include some powerful extensions to the language. The principal extensions are categories, protocols, type encoding, and constant string objects. The extensions are used throughout Cocoa and enable much of the power and flexibility that Cocoa programmers enjoy. The Apple and GNU compilers support the same extensions.
Categories
Categories enable the addition of methods to any class and can be used as an organizational tool or as an alternative to subclassing. Categories are declared to extend existing classes. The name of the category is specified in parentheses after a class name. The following category declaration ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.