September 2002
Intermediate to advanced
1272 pages
31h 12m
English
Content preview from Cocoa® Programming
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Encoding and Decoding
The Cocoa frameworks provide a convention for initializing an object instance by decoding data that has previously been encoded. Encoding and decoding object-instance data is the basis for storing objects on disk, and copying objects to different address spaces. Each class is responsible for encoding and decoding its own state by implementing two methods, -encodeWithCoder: and -initWithCoder:, which are declared in the NSCoding protocol. These methods are automatically called, under certain circumstances, by Cocoa framework classes such as NSCoder, NSArchiver, and NSUnarchiver. Almost all classes in the Cocoa frameworks conform to the NSCoding protocol and implement the two coding methods.
A file or block of memory that ...
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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.