iOS - when to remove subviews from UITableViewCell - uitableview

Question

I have a UITableView which a UIImage is added as a subview to each cell of it. The images are PNG transparent. The problem is when I scroll through the UITableView, the images get overlapped and then I receive the memory warning and stuff.
here's the current code for configuring a cell:
- (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];
}
int cellNumber = indexPath.row + 1;
NSString *cellImage1 = [NSString stringWithFormat:#"c%i.png", cellNumber];
UIImage *theImage = [UIImage imageNamed:cellImage1];
UIImageView *cellImage = [[UIImageView alloc] initWithImage:theImage];
[cell.contentView addSubview:cellImage];
return cell;
}
I know the code for removing the UIImage subview would be like:
[cell.imageView removeFromSuperview];
But I don't know where to put it. I've placed it between all the lines; even added an else, in the if statement. didn't seem to work!

Answer 1

UITableViewCell already have a image view attached. Remove:
UIImageView *cellImage = [[UIImageView alloc] initWithImage:theImage];
[cell.contentView addSubview:cellImage];
Add:
[cell.imageview setImage:theImage];
and you're good to go!
Result code will be like:
- (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];
}
UIImage *cellImage = [UIImage imageNamed:[NSString stringWithFormat:#"c%i.png", indexPath.row + 1]];
[cell.imageView setImage:cellImage];
return cell;
}

Answer 2

You just kepp this:
[cell.imageview setImage:theImage];
and remove:
UIImageView *cellImage = [[UIImageView alloc] initWithImage:theImage];
[cell.contentView addSubview:cellImage];