Instance Method

setActionIsDiscardable:

Sets whether the next undo or redo action is discardable.

Declaration

- (void)setActionIsDiscardable:(BOOL)discardable;

Parameters

discardable

Specifies if the action is discardable. YES if the next undo or redo action can be discarded; NO otherwise.

Discussion

Specifies that the latest undo action may be safely discarded when a document can not be saved for any reason.

An example might be an undo action that changes the viewable area of a document.

To find out if an undo group contains only discardable actions, look for the NSUndoManagerGroupIsDiscardableKey in the userInfo dictionary of the NSUndoManagerWillCloseUndoGroupNotification.

See Also

Discardable Undo and Redo Actions

undoActionIsDiscardable

Boolean value that indicates whether the next undo action is discardable.

redoActionIsDiscardable

Boolean value that indicates whether the next redo action is discardable.