core-dataxcode8macos-sierransundomanager

How to use NSUndoManager on macOS 10.12?

I read in the documentation that NSManagedObjectContext now defaults to a nil NSUndoManager on macOS. How can I set NSUndoManager?

Solution

  • Create an undo manager and assign it to the managed object context.

    NSUndoManager *undoManager = [[NSUndoManager alloc] init];
managedObjectContext.undoManager = undoManager;