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Re: making a key depend on keypaths of self

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Re: making a key depend on keypaths of self

Subject: Re: making a key depend on keypaths of self
From: Wain <email@hidden>
Date: Tue, 15 Nov 2005 21:53:32 +0000

On 15 Nov 2005, at 20:09, Phil Frost wrote:

The problem then is that I don't know how I'd send notifications. From what I can tell the only way is to call will/didChangeValueForKey: and friends, but firstly I could never call willChange... before making the change since I don't receieve notification until after it has happened, and secondly these methods work only for keys, and not keypaths.

You say you receive notification after 'it' has happened, this would indicate that you are already receiving a notification (presumably on the owning parent node), in which case you should be able to update the sum 'manually'.

If this is incorrect please give a little more information, i.e. are you using Core Data and NSManagedObject or are you creating new node instances in some other way?

Wain

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