// This method is called when the long press gesture is triggered starting the re-ording process.
// You insert a blank row object into your data source and return the object you want to save for
// later. This method is only called once.
- (id)saveObjectAndInsertBlankRowAtIndexPath:(NSIndexPath *)indexPath {
    id object = [_objects objectAtIndex:indexPath.row];
    // Your dummy object can be something entirely different. It doesn't
    // have to be a string.
    [_objects replaceObjectAtIndex:indexPath.row withObject:@"DUMMY"];
    return object;
}

// This method is called when the selected row is dragged to a new position. You simply update your
// data source to reflect that the rows have switched places. This can be called multiple times
// during the reordering process.
- (void)moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
    id object = [_objects objectAtIndex:fromIndexPath.row];
    [_objects removeObjectAtIndex:fromIndexPath.row];
    [_objects insertObject:object atIndex:toIndexPath.row];
}


// This method is called when the selected row is released to its new position. The object is the same
// object you returned in saveObjectAndInsertBlankRowAtIndexPath:. Simply update the data source so the
// object is in its new position. You should do any saving/cleanup here.
- (void)finishReorderingWithObject:(id)object atIndexPath:(NSIndexPath *)indexPath; {
    [_objects replaceObjectAtIndex:indexPath.row withObject:object];
    // do any additional cleanup here
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];

    // You will have to manually configure what the 'empty' row looks like in this
    // method. Your dummy object can be something entirely different. It doesn't
    // have to be a string.
    if ([[_objects objectAtIndex:indexPath.row] isKindOfClass:[NSString class]] &&
        [[_objects objectAtIndex:indexPath.row] isEqualToString:@"DUMMY"]) {
        cell.textLabel.text = @"";
        cell.contentView.backgroundColor = [UIColor clearColor];
        cell.accessoryType = UITableViewCellAccessoryNone;
    }
    else {
        NSDate *object = _objects[indexPath.row];
        cell.textLabel.text = [object description];
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    }

    return cell;
}