On Oct 5, 2009, at 11:54, Stuart Malin wrote:
An NSMutableArray is not KVO compliant for addition and deletion of
entries. You must either provide manual notification or create a
class with a To-Many property that is KVO compliant.
From the "Key Value Observing Programming Guide" --
Automatic notification is also supported for the collection proxy
objects returned by mutableArrayValueForKey: and
mutableSetValueForKey: . This works for to-many relationships that
support the indexed accessor methods
insertObject:in<Key>AtIndex:,replaceObjectIn<Key>AtIndex:, and
removeObjectFrom<Key>AtIndex:.
Except that, although your first paragraph is correct as far as it
goes, it's not the whole answer.
You can use the mutable array proxy for an array property that is
*not* implemented with the indexed accessor methods. They're sort of
irrelevant to the problem.
You can also replace the entire array, but KVO compliantly via KVC of
course, without being concerned with either mutable proxies or indexed
accessors. This is the brute force method, though, so it's often not
the best way. (Someone suggested this solution earlier in the thread,
but seemed to be saying that it was the *only* option, which isn't so.)
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