[cell.imageView setImageWithURL:[NSURL URLWithString:[item valueForKey:@"icon"]]placeholderImage:[UIImage imageNamed:@"icon_events_default.png"]];

在UITableView中加载图像后,我向下滚动,然后再向上滚动,我收到错误：EXC_BAD_ACCESS

- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder
{ 
  SDWebImageManager *manager = [SDWebImageManager sharedManager];

  // Remove in progress downloader from queue
  [manager cancelForDelegate:self];

  UIImage *cachedImage = [manager imageWithURL:url];

  if (cachedImage)
  {   
    //EXC_BAD_ACCESS hapens here   
    self.image = cachedImage;
  }
  else
  {
    if (placeholder)
    {
        self.image = placeholder;
    }

    [manager downloadWithURL:url delegate:self];
  }
}

任何帮助都非常感谢.