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Re: Manual KVO and will/didChangeValueForKey
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Re: Manual KVO and will/didChangeValueForKey


  • Subject: Re: Manual KVO and will/didChangeValueForKey
  • From: Scott Anguish <email@hidden>
  • Date: Thu, 2 Jun 2005 07:48:46 -0400


On Jun 2, 2005, at 2:51 AM, Tim Lucas wrote:

On 02/06/2005, at 3:47 PM, Andrew White wrote:

I'd like to be able to mirror the will/did messages from otherclass in this class.  I'd also like to make sure that I don't update data twice in observeValueForKeyPath:ofObject:change:context:, once on the willChangeValueForKey and once on the didChangeValueForKey.


I think willChangeValueForKey: just gives the any NSEditor's the chance to finish their editing (anybody confirm this?) -- it won't send out a KVO change notification.

    actually, every will must be matched with a did, or things won't work well.

Have you tried calling [self (will/did)ChangeValueForKey:@"property"] from inside your observeValueForKeyPath: method?



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References: 
 >Manual KVO and will/didChangeValueForKey (From: Andrew White <email@hidden>)
 >Re: Manual KVO and will/didChangeValueForKey (From: Tim Lucas <email@hidden>)

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