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Re: Bindings Problem

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Re: Bindings Problem

Subject: Re: Bindings Problem
From: mmalcolm crawford <email@hidden>
Date: Thu, 5 Jan 2006 17:05:32 -0800


On Jan 5, 2006, at 3:50 PM, Camillo Lugaresi wrote:

2. Is there a way I can post a notification in 'B' that the bound value will notice something has changed? (thus avoiding making 'A' get involved)... E.G. is it documented anywhere what should get posted and could I throw this manually (via my code)
willChangeValueForKey:
didChangeValueForKey:

This may be misleading. *You must not simply sprinkle your code with KVO change notifications*.

If a value changes, it is only valid to -- indeed, you must -- invoke willChangeValueForKey: *before* a value changes, see <http:// www.cocoabuilder.com/archive/message/cocoa/2005/12/23/153094>.

mmalc


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References:  
  >Bindings Problem (From: John McLaughlin <email@hidden>)
  >Re: Bindings Problem (From: Camillo Lugaresi <email@hidden>)




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