Re: KVO persists too long
Re: KVO persists too long
- Subject: Re: KVO persists too long
- From: "Jim Thomason" <email@hidden>
- Date: Sat, 30 Jun 2007 22:12:27 -0500
Assume, because life is that way, that this was caused by something
in your control, like overreleasing an object.
Well, yeah, a reasonable assumption, but....
I'm not retaining it. Nor am I allocating it, copying it, or otherwise know
anything about its existence. As best as I can tell it's something in the UI
that's adding itself as an observer and then failing to remove itself. For
sake of argument, NSZombieEnabled confirmed:
2007-06-30 21:22:29.843 Debtinator[12459] *** Selector
'observeValueForKeyPath:ofObject:change:context:' sent to dealloced instance
0x5238640 of class NSKeyValueObservationForwarder. Incidentally, I'm not
quite sure where that class comes from, since the actual object returned by
observationInfo is:
<NSKeyValueObservance: Observer: 0x5238640, Key path: apr, Include old: NO,
Include new: NO, Context: 0x4903d0, Property: 0x5241620>
And its observer property (valueForKey:@"observer") returns the NSTableView
that is the detailed view. So it's this wrapper object that appears from
somewhere apparently to forward on the KVO note to the table that's
vanishing.
I haven't got a clue how to even create an instance of either of those
classes or when I would (if it ain't in appkido, I normally don't look into
it).
So sure, I'm freely acknowledging that it's probably something within my
control, but it seems like it's something a few levels removed from where
I'm currently looking, and that's where I'm having trouble bridging the gap.
How do I get from this to whatever it is in my code that's presumably
causing the problem?
Breaking on [NSKeyValueObservance release] and
[NSKeyValueObservationForwarder release] haven't seemed to yield anything
useful.
-Jim...
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