title: iOS NSUrlConnection check upload speed
body: <p>i upload files to HTTP server. I know I can get upload progres with method</p>
  
  <pre><code>- (void)connection:(NSURLConnection *)connection didSendBodyData:(NSInteger)bytesWritten totalBytesWritten:(NSInteger)totalBytesWritten totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite
  </code></pre>
  
  <p>but is there any way to get upload speed?</p>