Question

I have a tableview with a lot of entries divided into multiple sections and inside that I have multiple rows.I have a button modelled as a checkbox in each rows. The checkboxes(buttons) can be activated/deactivated when pressed. I am loading an image on the button(checkbox) based on the status, whether it is checked or not. Everything is going fine, until I try to drag my UITableview downwards and then go up, only to find some of my checked checkboxes automatically unchecked. I kind of figured that, this was caused due to the use of

 dequeuereusablecellwithidentifier

I want to avoid this strange behavior of my tableview. Need help in this case.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
    UIButton *checkBox = [[UIButton alloc] init];
    checkBox.tag = contact.contactID;
    [cell.contentView addSubview:checkBox];
    [checkBox setFrame:CGRectMake(6,14,20,20)];
    [checkBox release];
}
UIButton *checkBox = (UIButton *)[cell.contentView viewWithTag:contact.contactID];

if(isActivDeactivButton)
{
    [checkBox setImage:[UIImage imageNamed:@"disabled_checkbox.png"] forState:UIControlStateNormal]; 
   }
else{
   [checkBox setImage:[UIImage imageNamed:@"selected_checkbox.png"] forState:UIControlStateNormal];
 }
return cell;
}

Answer 1

I replaced

checkBox.tag = contact.contactID;

with

checkBox.tag = 111;

This solved the problem as my contactID values were changing during scroll.