Mac OS X Reference Library Apple Developer Connection spyglass button

Version: 1.0

Posted: 2008-06-04

Build Requirements: Mac OS X 10.5, Xcode 3.0

Runtime Requirements: Mac OS X 10.5

View Source Code:

Download Sample Code (“DerivedProperty.zip”, 35.8K)


Description

Searching against Unicode text is a potentially expensive operation. This sample uses a derived property in Core Data to maintain a normalized version of string data for faster searching. In addition, a value transformer overrides the predicate in a search field so that the search string is also normalized.

Document Revision History

Date Notes
2008-06-04Illustrates use of Core Data derived properties to make searching against string data more efficient.
Did this document help you? Yes It's good, but... Not helpful...