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Re: Listening for changes

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Re: Listening for changes

Subject: Re: Listening for changes
From: Andre Masse <email@hidden>
Date: Fri, 19 Dec 2008 12:39:51 -0500

Thanks for the great trick!

Andre Masse

On Dec 19, 2008, at 12:35, Ken Thomases wrote:

On Dec 19, 2008, at 11:06 AM, Andre Masse wrote:
Let's say I have a class (called it Client) that has 25 fields and need to be notified when any of these is modified. Do I have to do - observeValueForKeyPath for each of the 25 fields?
You can add one "fake" property, use +keyPathsForValuesAffecting<Key> to tell KVO that all of your other keys affect the value of this one property, and then observe that one key.

On Tiger, you'd have to use +setKeys:triggerChangeNotificationsForDependentKey: to tell KVO about the dependencies.
Cheers,
Ken


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References:  
  >Listening for changes (From: Andre Masse <email@hidden>)
  >Re: Listening for changes (From: Ken Thomases <email@hidden>)




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