Clever! Thanks for the suggestion.
Andre Masse
Keary Suska <mailto:[email protected]>
December 14, 2011 10:56
This kind of approach is probably best unless you can base your
superclass on NSManagedObject, which does this automatically. But, as
you find, there is some difficulty. I would have a pseudo-flag, say
"hasBeenModified", and implement
+keyPathsForValuesAffectingHasBeenModified:. In -hasBeenModified
simply set the flag KVO-compliantly. You mat want to check the flag to
avoid unnecessary KVO calls.
HTH.
Keary Suska
Esoteritech, Inc.
"Demystifying technology for your home or business"
Andre Masse <mailto:[email protected]>
December 14, 2011 08:29
Hi,
I have a superclass which has a "modified" BOOL property and a bunch
of subclasses based on it. When any property is changed, I need to set
this flag to YES. I can either write a setter for all properties and
set this flag there, or observe all properties and set the flag in
-observeValueForKeyPath. Both approach involve a lot of boilerplate
coding (some subclasses have 20+ properties).
I thought about using -keyPathsForValuesAffectingModified: but I don't
see how I can set a flag using this.
Any ideas?
Thanks,
Andre Masse
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