NSFetchedResultsController.sortDescriptor by KeyPath

How can I set my fetchedResultsController.sortDescriptors to contain a sortdescriptor that uses a keypath, for instan开发者_如何学Cce, such as @"foo.name"?

Cheers

Nik

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Despite NSSortDescriptor's use of the name “key”, it actually takes a key path, as described in the documentation. So, just create an NSSortDescriptor with your key path as the “key”, and use that.