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Re: How to de-register value observers

Nick Zitzmann wrote: 

On Sep 3, 2007, at 12:29 PM, Tron Thomas wrote:

removeObserver:forKeyPath: is the equivalent for addObserver:forKeyPath:options:context, which is call by the object that wants to observe the value.

Since the observing object registers itself, it seems that the same object should de-register itself as well. I'm not sure how every registered object is supposed to know that the window controller is deallocating itself so they can de-register themselves. 

The first thing I would try is using NSNotificationCenter...

Nick Zitzmann
<http://www.chronosnet.com/>
I'm not exactly sure how you are suggesting that NSNotificationCenter would be used.

One idea I have every object that registers for a binding the controller would also register for a notification. Before the controller deallocates, it would post a notification informing all the observers they should de-register.

I don't know if it is possible that the controller would attempt to deallocate before all the registered object has responded to the registered notification.

Perhaps there is a different way you are suggesting that NSNotificationCenter would be used.

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References: 
 >How to de-register value observers (From: Tron Thomas <email@hidden>)
 >Re: How to de-register value observers (From: Nick Zitzmann <email@hidden>)
 >Re: How to de-register value observers (From: Tron Thomas <email@hidden>)
 >Re: How to de-register value observers (From: Nick Zitzmann <email@hidden>)



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