Master Data - GROUP BY

Question

I am trying to group the results returned by Core Data. I read that you need to use "SortDescriptors" with a selector, but I can not get it to work?

Am I trying to return unique group name values?

http://developer.apple.com/library/ios/#documentation/cocoa/Conceptual/SortDescriptors/Concepts/Creating.html

Answer 1

try using @ distinctUnionOfArrays.contactNumber to get objects

Answer 2

Actually, I think you want @distinctUnionOfObjects . See Xcode Coding Documentation: Key Value Programming Guide: Collection Operators .