SDWebImage in a UITableViewCell - cancel any download operation before reusing the cell. Otherwise, you might see previous images loading in before the correct one is finished downloading.

CBGameController.m

- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath
{  
    static NSString *identifier = @"MoveViewCell";
    CBMoveView *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    
    if (!cell)
      cell = [[CBMoveView alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
    
    cell.move = (CBMove *)[self.moves objectAtIndex:indexPath.row];
    [cell configure];
    
    return cell;
  }
}

CBMoveCell-After.m

// AFTER

@interface CBMoveCell
@property (weak) id <SDWebImageOperation> imageOperation;
@end

////////////

- (void)prepareForReuse
{
  [super prepareForReuse];

  if (self.imageOperation)
    [self.imageOperation cancel];
  
  self.imageOperation = nil;
}

- (void)configure
{
  // some stuff
  if (self.move.image)
  {
    SDWebImageManager *manager = [SDWebImageManager sharedManager];
    self.imageOperation = [manager downloadWithURL:[NSURL URLWithString:self.move.image]
                                           options:SDWebImageRetryFailed
                                          progress:nil
                                         completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, BOOL finished) {
                                           if (image)
                                            self.moveImageView.image = image;
                                         }];  
  }
  // some other stuff
}

CBMoveCell-Before.m

// BEFORE

- (void)configure
{
  // some stuff
  if (self.move.image)
  {
    // Download or retrieve the image from the cache via SDWebImage
    [self.moveImageView setImageWithURL:[NSURL URLWithString:self.move.image]
                       placeholderImage:[UIImage imageNamed:@"placeholderImage"]
                                options:SDWebImageRetryFailed];
  }
  // some other stuff
}