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Introduction to Undo Architecture

Contents:

Organization of This Document

This topic describes how to record operations with NSUndoManager, so the user can reverse an operation’s effect.

Organization of This Document

• “Undo Manager” describes the object which records operations for undo and redo.

• “Registering Undo Operations” describes how to add operations to the undo stack.

• “Performing Undo and Redo” describes how to do an undo and a redo.

• “Cleaning the Undo Stack” describes how to remove operations from the undo stack.

• “Setting Action Names” describes how to provide custom names for the Undo and Redo menu items.

• “Using Undo in Applications” describes the Application Kit’s additions to undo.

• “Using Undo Notifications” describes synchronizing using notifications.

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