January 2009
Beginner
359 pages
8h 12m
English
Content preview from Learn Objective-C on the Mac
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Chapter 13
Protocols
in the previous chapter, we talked about the magic of categories and informal protocols. When you use an informal protocol, as you saw in Chapter 12, you implement only the methods you want to respond to. For the NSNetServiceBrowser delegate in Chapter 12, we implemented only the two methods that get called when a new service is added to or removed from the network: we didn't have to implement the six other methods in the NSNetServiceBrowserDelegate informal protocol. We also didn't have to declare anything in our object saying that we're usable as an NSNetServiceBrowser delegate. It all just worked with a minimum of fuss.
As you might guess, Objective-C and Cocoa also include the concept of a formal protocol, and in this ...
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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.
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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.