title: SDWebImage Image received size is NULL
body: <p>I am trying to show progress view with SDWebImage but when i try below code then it return "0" in "receivedSize"</p>
  
  <pre><code>[cell. ImageHotDish setImageWithURL:[NSURL URLWithString:picName]
       placeholderImage:[UIImage imageNamed:nil]
       options:0 progress:^(NSUInteger receivedSize, long long expectedSize) {
           NSLog(@"Downloaded = %@",receivedSize);
       } completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType) {
           [cell.ImageHotDish setImageWithURL:[NSURL URLWithString:picName]];
       }];
  </code></pre>
  
  <p>I am getting null velue in "receivedSize"</p>
  
  <p>Can any one tell me where i am doing wrong</p>
  
  <p>I have already check this solution but its not showing progress but just an activity indicator. What i am trying to get how much image have been downloaded.</p>
  
  <p><a href="https://stackoverflow.com/questions/11262204/show-activity-indicator-in-sdwebimage">Show activity indicator in SDWebImage</a></p>