I would also expect that you can observe your
NSManagedObjectContext's "hasChanges" property using KVO.
No, you can not:
http://developer.apple.com/documentation/Cocoa/Reference/CoreDataFramework/Classes/NSManagedObjectContext_Class/Reference/Reference.html#/
/apple_ref/doc/uid/TP30001182-BAJBHIDI
Not everything is observable because not everything is compliant.
There are a number of reasons why it might not be feasible or why it
might be woefully inefficient to use KVO.
I take it, Chris, you really like the KVO mechanism. I do to. ;-)
But you can't fit everything into it, nor should you where performance
is more important than programmer convenience.
--
I.S.
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