September 2002
Intermediate to advanced
1272 pages
31h 12m
English
Content preview from Cocoa® Programming
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Responders
When keyboard events, mouse events, timer events, or other events are detected by the run loop and the NSApplication instance that manages the run loop, those events are converted into instances of the NSEvent class and dispatched to other objects using Objective-C messages. The use of messaging is an important difference from other user interface toolkits and results in much of the power and flexibility of Cocoa. The Application Kit does not use C-language switch statements or explicit tables of function pointers. The messaging capabilities built into the Objective-C runtime are ideally suited to event dispatching.
An object that can receive event messages is called a responder. Figure 8.1 illustrates the relationships and communications ...
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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.
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.