*** Assertion failure in -[UITableView _endCellAnimationsWithContext:],
/SourceCache/UIKit_Sim/UIKit-3347.40/UITableView.m:1623

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {

    if (editingStyle == UITableViewCellEditingStyleDelete && indexPath.section == 1) {
        // Delete cell
        [tableView beginUpdates];
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
        [tableView endUpdates];


        // Delete LocationCategory from managedObjectContext
        LocationCategory *categoryToDelete = [self.locationCategories objectAtIndex:indexPath.row];
        [self.managedObjectContext deleteObject:categoryToDelete];
        [self.managedObjectContext save:nil];

    } else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    self.title = @"Select a Category";

    // Core Data
    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication]delegate];
    self.managedObjectContext = [appDelegate managedObjectContext];

    // Fetch LocationCategories & dump them in an array
    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    [fetchRequest setEntity:[NSEntityDescription entityForName:@"LocationCategory" inManagedObjectContext:self.managedObjectContext]];
    NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"categoryName" ascending:YES];

    NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:&sortDescriptor count:1];
    [fetchRequest setSortDescriptors:sortDescriptors];

    NSArray *categories = [self.managedObjectContext executeFetchRequest:fetchRequest error:nil];
    self.locationCategories = categories;

    [self.tableView reloadData];
}

// This was previously an NSArray. It needs to be an NSMutableArray
@property (nonatomic, strong) NSMutableArray *locationCategories;

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete && indexPath.section == 1) {
        // Delete LocationCategory from managedObjectContext
        LocationCategory *categoryToDelete = [self.locationCategories objectAtIndex:indexPath.row];
        [self.managedObjectContext deleteObject:categoryToDelete];
        [self.locationCategories removeObjectAtIndex:indexPath.row];
        [self.managedObjectContext save:nil];


        // Delete cell
        [tableView beginUpdates];
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
        [tableView endUpdates];

    } else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }
}

NSArray *categories = [self.managedObjectContext executeFetchRequest:fetchRequest error:nil];
    self.locationCategories = [categories mutableCopy];

LocationCategory *categoryToDelete = [self.locationCategories objectAtIndex:indexPath.row];
    [self.locationCategories removeObjectAtIndex:indexPath.row];