On Jun 15, 2008, at 3:53 PM, James W. Walker wrote:
On Jun 15, 2008, at 3:25 PM, Andreas Monitzer wrote:
On Jun 16, 2008, at 00:20, James W. Walker wrote:
Is there a standard Cocoa design pattern or idiom to have an
object find out when another object has been destroyed? In
PowerPlant, I'd use LBroadcaster and LListener, with the listener
listening for msg_BroadcasterDied.
What about using NSNotificationCenter?
Thanks, it looks like that would work. Somehow I was under the
impression that notifications were, uh, broadcast more broadly than
I wanted, but now I see that you can register to receive
notifications only for a specific object.
If using the new Objective-C garbage collection is an option, you
could also use a zeroing weak reference: see <http://developer.apple.com/documentation/Cocoa/Conceptual/GarbageCollection/Articles/gcDesignPatterns.html#//apple_ref/doc/uid/TP40006762-SW10
>
--Chris N.
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