NSUndoManager and Undo/Redo Menu Items "disconnected" from each other

Question

In a Cocoa application I implemented Undo/Redo and the functionality works as expected. The problem is that both ("Undo" and "Redo") menu items seem to be "disconnected" from NSUndoManager in use, in the sense that they are not disabled/enabled in accordance with the undo/redo stacks sizes. They remain always enabled and they also do not update their "action name"

[undoManager setActionName:@"Move To Trash"];

seems ineffective. Menu items always read "Undo" and "Redo". Both items sent their actions to First Responder and actions work.

Since the application is not NSDocument based, I also tried implementing

- (NSUndoManager *)windowWillReturnUndoManager:(NSWindow *)sender;

in window's delegate as I read in a few places could help. The method is called on both action and when undoing but this doesn't change anything. Everything behaves as without this delegate method.

What else might I be doing wrong or missing?

Answer 1

In case somebody else is on a path to lose as much time on this as I have…

The reason for observed misbehaviour in this particular case was that the "Edit" NSMenu containing both "Undo" and "Redo" NSMenuItems did NOT have "Auto Enables Items" set/checked. After checking the appropriate checkbox in Interface Builder not only both menuitems began to get properly disabled/enabled but also their textual content started to get adjusted in accordance with NSUndoManager's setActionName:(NSString *)name calls.