Add row of a certain cell id to a UITableView: returns an empty row

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C

Objective-C

I have a custom `UITableView` with different cell id's. I'm trying to add a row when the button gets selected. Here is my code:

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.numberOfRows;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    NSString *cellID;

    ...
    else if ([indexPath row] == 5) {
        cellID = @"rowFive";
    }
    else if ([indexPath row] >= self.myNum && [indexPath row] <= self.myNum) {
        cellID = @"rowSix";
    }
    else if ([indexPath row] == self.myNum + 1) {
        cellID = @"rowSeven";
    }
    else if ([indexPath row] == self.myNum + 2) {
        cellID = @"rowEight";
    }

    customCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID forIndexPath:indexPath];

    if (cell == nil) {
        cell = [[customCell alloc] init];
    }

    return cell;
 }

- (IBAction)addRow:(id)sender
{
    self.myNum ++;
    self.numberOfRows ++;
    [self.myTableView reloadData];
}

What happens is, when I select the button, a row gets added, but nothing inside of it. It's just an empty row, and it doesn't get loaded with the cell id of `rowSix`.

When I delete the if statement of `cell == nil`, then, when I select the button, the app crashes with an error.