Use of KVC Array operators
Use of KVC Array operators
- Subject: Use of KVC Array operators
- From: Eli Bach <email@hidden>
- Date: Thu, 11 Mar 2010 20:34:48 -0700
The operators mentioned on this page, particularly "@unionOfSets".
<http://developer.apple.com/mac/library/documentation/cocoa/Conceptual/KeyValueCoding/Concepts/ArrayOperators.html>
I have the following Core Data object's setup
ClassA ClassB ClassC
relationA --> relationB --> relation C
where each of the relations is a many to one [one class A, many class B, and one class B, many class C].
Not all ClassB's will have ClassC objects attached to them
I have an instance of classA, and I want an NSArrayController with all the ClassC objects for all the ClassB objects that are related to that specific instance of ClassA, preferably in a way that uses KVO instead of programmatically updating with fetches/predicates/etc.
What would be the right way to bind the NSArrayController, assuming the nib owner has an instance of classA:
ie:
bind content set to
File Owner.instanceOfA.?
Thanks,
Eli
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