September 2002
Intermediate to advanced
1272 pages
31h 12m
English
Content preview from Cocoa® Programming
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Target-Action Paradigm
One of the most powerful features of the Application Kit is its use of the target-action paradigm. Objective-C messages that have one object argument are called actions. The one argument is usually the sender of the action message. A target is an object that can receive action messages. Targets and actions can be defined programmatically or in Interface Builder. The target-action paradigm is a key mechanism with which user interface elements respond to user actions. The target-action paradigm is implemented with four parts, the NSControl class, the NSActionCell class, the NSApplication class, and the responder chain. User interface elements such as menu items, buttons, and text fields are implemented as subclasses of either ...
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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.