Joan Lluch
El 20/08/2008, a las 16:05, Negm-Awad Amin escribió:
Am Mi,20.08.2008 um 15:37 schrieb Joan Lluch (casa):
I've been reading this thread and I don't understand it in the case
of GC. Why don't you still have to remove the observer from the
notification center when you are not longer using it. Even if it is
held as a weak reference, it will still remain registered for
receiving notifications, so what when the observer is eventually
collected, won't the notification center continue sending messages
to the observer as long as it remains registered to receive them?,
Please clarify.
First I want to say, that I'm happy to have a thread on this list,
which is not related to a concrete problem, but discusses a design.
I like that. :-)
Second: As you read, *I* would prefer to unregister the observer
explicitly. You can do this in -finalize, but I do not have to
repeat the design problems with finalization. *I* wanted a delegate
method or a defined method to be overwritten in a subclass (I
mentioned -close) to do it explicitly, *before* destroying the
object. You ask the wrong person …
Third, to your question: Weak references in GC – they have nothing
to do with "retainless" weak references using RC – are nullified
automatically. If you use GC the weak collection should be modified
appropiate by the collector itself. So this might be no problem. (I
didn't test it, because it is not my idea.)
I understand what is your preferred approach, which it is also what I
would do. I can add to it that I even thought that you *have to*
*always* unregister the observers when you have done with them. This
is obviously true in RC environment, but this is apparently not true
in the case of GC. This is the part I don't get. I would appreciate if
someone would clarify it for me.
Joan Lluch
_______________________________________________
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to [EMAIL PROTECTED]
