undoActionIsDiscardable
A Boolean value that indicates whether the next undo action is discardable.
Declaration
var undoActionIsDiscardable: Bool { get }Discussion
true if the action is discardable; false otherwise.
Specifies that the latest undo action may be safely discarded when a document can not be saved for any reason. These are typically actions that don’t affect persistent state.
An example might be an undo action that changes the viewable area of a document.