September 2002
Intermediate to advanced
1272 pages
31h 12m
English
Content preview from Cocoa® Programming
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Forwarding, Distributed Objects, and Proxies
When objc_msgSend(id self, SEL op, ...) and objc_msgSendSuper(struct objc_super *super, SEL op, ...) fail to find a method that corresponds to the selector of a received message, the –forwardInvocation: method implemented by the NSObject class is called. The argument to –forwardInvocation: is an instance of the NSInvocation class initialized with information about the message that could not be handled including the selector and any arguments.
The default implementation of –forwardInvocation: calls [self doesNotRecognizeSelector:aSelector]. The –doesNotRecognizeSelector: method raises an exception. If –forwardInvocation: is overloaded, it can be implemented to find another receiver for the message ...
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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.
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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.