Instance Property

undoManager

The undo manager of the context.

Declaration

var undoManager: UndoManager? { get set }

Discussion

You can set the undo manager to nil to disable undo support. This provides a performance benefit if you do not want to support undo for a particular context, for example in a large import process—see Core Data Programming Guide.

If a context does not have an undo manager, you can enable undo support by setting one. You may also replace a context’s undo manager if you want to integrate the context’s undo operations with another undo manager in your application.

See Also

Undoing Changes

func undo()

Sends an undo message to the context’s undo manager, asking it to reverse the latest uncommitted changes applied to objects in the object graph.

func redo()

Sends a redo message to the context’s undo manager, asking it to reverse the latest undo operation applied to objects in the object graph.

func reset()

Returns the context to its base state.

func rollback()

Removes everything from the undo stack, discards all insertions and deletions, and restores updated objects to their last committed values.

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