Data Formatting Programming Guide for Cocoa
PDF
Introduction
Formatters
Number Formatters
Date Formatters
Formatters and User Interface Elements
Date and Number Formatters on Mac OS X v10.0 to 10.3
Creating a Custom Formatter
Revision History
RELATED REFERENCE
OBJECTIVE-C
NSDateFormatter
NSFormatter
NSNumberFormatter
PROCEDURAL C
CFDateFormatter Reference
CFNumberFormatter Reference