UITableView cell reuse

[architectpianist]

Hi,
I'm using a table view to show RGB color sliders and a preview color (4 cells per section). I have an NSMutableArray containing as many NSDictionaries as there are sections, and each section contains sliders for the keys @"Red", @"Green", and @"Blue". I'm getting some very strange effects on the cells after scrolling. As soon as I leave some cells to scroll down, their sliders disappear, but I can still interact with them! This is the code I'm using:

 -(void)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 ([cell.contentView subviews])
		for (UIView *view in [cell.contentView subviews]) 
			[view removeFromSuperview];     //Clear the cell's subviews
	cell.textLabel.text = @"";
	if (indexPath.row == 0)
	{
		cell.textLabel.text = @"Red";
		if ([[sliders objectAtIndex:indexPath.section] objectForKey:@"Red"])
		{
			[cell.contentView addSubview:[[sliders objectAtIndex:indexPath.section] objectForKey:@"Red"]];
		}
		else
		{
			UISlider *slider = [[UISlider alloc] initWithFrame:CGRectMake(80, 0, 196, 50)];
			slider.minimumValue = 0.0;
			slider.maximumValue = 1.0;
			slider.tag = indexPath.section;
			const CGFloat *colors = CGColorGetComponents([[self.newColors objectAtIndex:indexPath.section] CGColor]);
			slider.value = colors[0];
			[cell.contentView addSubview:slider];
			[slider addTarget:self action:@selector(changeRed:) forControlEvents:UIControlEventValueChanged];
			[[sliders objectAtIndex:indexPath.section] setObject:slider forKey:cell.textLabel.text];
		}
	}
	//etc. etc.
	else if (indexPath.row == 3)
	{
		if ([previewers objectForKey:[NSString stringWithFormat:@"%i", indexPath.section]])
		{
			NSLog(@"%i %i is already present.", indexPath.section, indexPath.row);
			[cell.contentView addSubview:[previewers objectForKey:[NSString stringWithFormat:@"%i", indexPath.section]]];
		}
		else
		{
			VSColorPreviewer *previewer = [[[VSColorPreviewer alloc] initWithFrame:CGRectMake(5, 5, 270, 34)] autorelease];
			previewer.backgroundColor = [UIColor clearColor];
			previewer.lineColor = [self.newColors objectAtIndex:indexPath.section];
			[cell.contentView addSubview:previewer];
			[previewers setObject:previewer forKey:[NSString stringWithFormat:@"%i", indexPath.section]];
		}
	}
	
	return cell;
}

Any help would be appreciated!

[dany_dev]

i think the problem is here

if ([cell.contentView subviews])
		for (UIView *view in [cell.contentView subviews]) 
			[view removeFromSuperview];     //Clear the cell's subviews

you are removing all subviews, not just what you added.

To fix it, remove just the view that have a fixed tag (seem that you use section as tag for all cell)

for (UIView *view in [cell.contentView subviews]) 
		if(view.tag==indexPath.tag)	[view removeFromSuperview];