Re: KVO one-step listening but two-step notifying?
Re: KVO one-step listening but two-step notifying?
- Subject: Re: KVO one-step listening but two-step notifying?
- From: mmalcolm crawford <email@hidden>
- Date: Tue, 27 Dec 2005 16:00:16 -0800
On Dec 27, 2005, at 3:55 PM, Hamish Allan wrote:
Thanks Michel, that's exactly right. And I think the related question
implied by the subject line -- why must I provide notifications
before and
after the change, when I can only receive them after the change? --
still
stands.
Again, that's just the way it works. In the notification you can (in
theory at least...) get the old and new values, so if you need to
calculate a delta between old and new you can do so.
mmalc
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