Canonicalized String Searching Using a Core Data Derived Property
Version 1.3, 2013-05-20
Updated project format, and to use ARC.
(Full Revision History)
Xcode 4.5, OS X 10.7 or later.
OS X 10.7 or later.
Searching against Unicode text is a potentially expensive operation. "DerivedProperty" shows how you can use a derived property in Core Data to maintain a canonicalized version of string data to make searching more efficient. In addition, a value transformer overrides the predicate in a search field so that the search string is also normalized.