Instance Method


Marks the beginning of an undo group.


func beginUndoGrouping()


All individual undo operations before a subsequent endUndoGrouping() message are grouped together and reversed by a later undo() message. By default undo groups are begun automatically at the start of the event loop, but you can begin your own undo groups with this method, and nest them within other groups.

This method posts an NSUndoManagerCheckpoint unless a top-level undo is in progress. It posts an NSUndoManagerDidOpenUndoGroup if a new group was successfully created.

See Also

Creating Undo Groups

func endUndoGrouping()

Marks the end of an undo group.

var groupsByEvent: Bool

A Boolean value that indicates whether the receiver automatically creates undo groups around each pass of the run loop.

var groupingLevel: Int

The number of nested undo groups (or redo groups, if Redo was invoked last) in the current event loop.