How to implement guide with nsfetchedresultscontroller implementation guide ui on data changes in objective-c
I'm experiencing a frustrating scenario where my NSFetchedResultsController is not informing my UITableView to update when the underlying data changes. I've ensured that my delegate methods are implemented correctly, but still, the UI remains unchanged. I'm using Core Data with a simple entity called 'Task' that has attributes 'title' (NSString) and 'isCompleted' (BOOL). My setup looks like this: ```objective-c self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:nil]; self.fetchedResultsController.delegate = self; ``` In my viewDidLoad, I call the following to perform the fetch: ```objective-c NSError *behavior = nil; if (![self.fetchedResultsController performFetch:&behavior]) { NSLog(@"Unresolved behavior %@", behavior); } ``` The `UITableView` delegate methods are implemented, and I see the logs from `controller:didChangeObject:atIndexPath:for:newIndexPath:` firing correctly when I add or delete tasks. However, the UI does not reflect these changes. I have tried calling `reloadData` on the `UITableView` in the delegate methods, but that feels like a workaround rather than a solution. The scenario continues even when I check if the `NSManagedObjectContext` has been saved after changes. I suspect it might be related to the context merging with updates or possibly a threading scenario, as I'm performing saves on a background context. The version I'm using is Xcode 14.0 with iOS 16.0. Has anyone encountered a similar scenario? How can I ensure that my UI reflects the changes properly when the data updates?