Re: The KVO Race

FROM : Keith Duncan
DATE : Tue Jun 03 22:46:36 2008

> I have traced the problem to KVO race conditions.


In most cases these can be solved by setting up the key dependencies 
and occasionally by using the NSKeyValueObservingOptionInitial 
(Leopard only) option.

From your summary, I'm assuming that the editLayer property is 
dependent on the NSIndexPath that you're also observing.

So, if you're targeting 10.4 you can use the 
+setKeys:triggerChangeNotificationsForDependentKey: method in your 
controller's +initialize method to set the dependencies. This method 
is deprecated in Leopard in favor of the 
+keyPathsForValuesAffectingValueForKey: method. Look them up in the 
documentation for how to use them.

Keith