Question

i have a Grouped TableView with textfields in the UITableViewCells.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath     *)indexPath
{
static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

}


if(indexPath.section < 6) {
    UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(20, 10,580, 31)];
    textField.tag = indexPath.section + 22;
    textField.delegate = self;
    [cell.contentView addSubview:textField];
    [textField release];
}
return cell;
}

So when i press the Save Button, the saveItem Method is called:

- (void)saveItem {
    NSMutableArray *textFieldArray = [[NSMutableArray alloc] init];
    for (int i = 0; i <6; i++) {
        [textFieldArray addObject:(UITextField *)[self.view viewWithTag:22+i]];
    }
...
}

I can change the values of the first 4 TextFields without a problem. they are also saved, but when i change a value in the 5th or 6th Textfield, my app crashes and i get an error:

* Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘* -[NSMutableArray insertObject:atIndex:]: attempt to insert nil object at 0′

Any suggestions?

Thanks so far.

Answer 1

I think the problem is in that: not all sections are displayed when you tap Save button. So when you try to access view with tag 5 and 6 they are nil because they are not displayed and so were’t added (or were removed) from your view.

To test this just try to scroll to bottom of your tableView and try to tap Save button.