Re: [NSObject setValue:forUndefinedKey:] no longer requires explicit KVC notifications?
Re: [NSObject setValue:forUndefinedKey:] no longer requires explicit KVC notifications?
- Subject: Re: [NSObject setValue:forUndefinedKey:] no longer requires explicit KVC notifications?
- From: Gabriele de Simone <email@hidden>
- Date: Mon, 10 Aug 2009 08:36:59 -0400
The KVC infrastructure did not always generate value-changed
notifications for setValue:forUndefinedKey: overrides.
The setValue:forUndefinedKey: override should have nothing to do
with it. It's the setValue:forKey: call -- the one which provokes
the call to setValue:forUndefinedKey: -- that's responsible for
triggering the KVO change notifications.
Doubting my own sanity (always a good approach, IMO) I searched
for, and found some evidence of this in an old discussion:
http://www.cocoabuilder.com/archive/message/cocoa/2006/10/12/172593
That thread doesn't confirm what you're saying. It says the
opposite. It says what I just said. If you override
setValue:foKey: _then_ you lose automatic KVO notifications and
would have to reimplement them yourself, but if you just override
setValue:forUndefinedKey: you don't have that problem.
Indeed! I feel like a jackass, thanks for catching this :-)
Gabe
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