Introduction to Data Formatting Programming Guide For Cocoa

Explains how to use Cocoa formatters to create and validate text in text fields and other cells.

Organization of This Document

Date Formatters describes how to use date formatters.

Number Formatters describes how to use number formatters.

Formatters and User Interface Elements describes how to set a formatter for a user interface element, and the interaction between an element and its formatter in OS X.

Creating a Custom Formatter outlines how to create custom formatter classes.