How do I use Core Data and correctly show animation when switching between edit mode while using an extra row to insert a new record?

Question

I'm trying to use an extra row at the bottom of my UITableView which would be used to insert a record. This works fine, but I'm having trouble getting it to animate properly. Either the extra row is shown properly and I get no animation (by using [self.tableView reloadData] in the setEditing: method. Or, I get animation and no extra row by not using reloadData. I know that I'm probably not showing the extra row properly (returning one more row in my numberOfRowsInSection method, and using reloadData to force a refresh.).

I know there must be a right way to do this, but I haven't seen any examples.

- (void)setEditing:(BOOL)editing animated:(BOOL)animated {


    [super setEditing:editing animated:animated];

    [self.tableView setEditing:editing animated:animated];


}


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    id <NSFetchedResultsSectionInfo> sectionInfo = [[fetchedResultsController sections] objectAtIndex:section];
    if (self.editing == YES) {
        return [sectionInfo numberOfObjects] + 1;    
    }
    return [sectionInfo numberOfObjects];

}


- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath {

    if (indexPath.row + 1 > [fetchedResultsController.fetchedObjects count]) {
        cell.textLabel.text = @"Add New Row...";
        [cell setSelectionStyle:UITableViewCellSelectionStyleNone];
    } else {

        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
        MyManagedObject *aManagedObject = [fetchedResultsController.fetchedObjects objectAtIndex:indexPath.row];
        cell.textLabel.text = aManagedObject.planName;
    }
}

Anomie Anomie · Accepted Answer · 2011-03-05T18:21:36

Use insertRowsAtIndexPaths:withRowAnimation: to inform the table view that you "inserted" a row at the necessary location when editing begins and deleteRowsAtIndexPaths:withRowAnimation: to inform the table view that you "removed" the row when editing is complete.

How do I use Core Data and correctly show animation when switching between edit mode while using an extra row to insert a new record?

2 Answers