Fast Image Cache with progress indicator

[pmurphyjam]

Anyway to add the ability to have a download progress indicator for Fast Image Cache?

Right now there appears to be no way to do this from the wantsSourceImageForEntity call.

If you use any of the NSURLSessionDownloadDelegate's they have their own delegate calls for progress and a final didFinishDownloadingToURL which gives the image from the Server. From this delegate you can Manually set the image just downloaded, but now you have no way to force retrieveImageForEntity to fire off to now load the just downloaded image.

The only way I can get progress to work is to basically download the same image twice, one in the wantsSourceImageForEntity with a downloadTaskWithRequest:completionHandler, and the other with a downloadTaskWithRequest and then using the NSURLSessionDownloadDelegate

• (void)URLSession:(NSURLSession *)session
  downloadTask:(NSURLSessionDownloadTask *)downloadTask
  didWriteData:(int64_t)bytesWritten
  This works but it's not very good since your basically downloading the image twice.
  totalBytesWritten:(int64_t)totalBytesWritten
  totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite