moveRowAtIndexPath: how to delete section once last row is moved to another section

Question

I have a tableview with several sections. I would like to be able to move rows from one section into another and to delete a section once it has no rows. I am trying to do this through moveRowAtIndexPath but the code I have doesn't work and throws an NSRangeException exception.

Here is a code sample:

- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {

    NSUInteger fromSection = [fromIndexPath section];
    NSUInteger fromRow = [fromIndexPath row];
    NSString *fromKey = [self.keys objectAtIndex:fromSection];
    NSMutableArray *fromEventSection = [self.eventsDict objectForKey:fromKey];

    NSUInteger toSection = [toIndexPath section];
    NSUInteger toRow = [toIndexPath row];
    NSString *toKey = [self.keys objectAtIndex:toSection];
    NSMutableArray *toEventSection = [self.eventsDict objectForKey:toKey];

    id object = [[fromEventSection objectAtIndex:fromRow] retain];
    [fromEventSection removeObjectAtIndex:fromRow];
    [toEventSection insertObject:object atIndex:toRow];
    [object release];
    // The above code works just fine!

    // Try to delete an empty section. Here is where trouble begins:
    if ((fromSection != toSection) && [fromEventSection count] == 0) {
     [self.keys removeObjectAtIndex:fromSection];
     [self.eventsDict removeObjectForKey:fromKey];

     [tableView deleteSections:[NSIndexSet indexSetWithIndex:fromSection] withRowAnimation:UITableViewRowAnimationFade];
    }

Answer 1

Hi,

did you get an answer for this. I can't figure it out either