Ios Can i get Upload progress from Graph api Facebook?

In my app i need to upload a video to the user's facebook wall. I use this code and it works:

[FBRequestConnection startWithGraphPath:@"me/videos"
                             parameters:params
                             HTTPMethod:@"POST"
                      completionHandler:^(FBRequestConnection *connection,
                                          id result,
                                          NSError *error)
 {
     if (error)
     {
         //showing an alert for failure

     }
     else
     {
         //showing an alert for success



     }

 }];

I wanna add a progress bar during the upload time... but i can't find anything that works...I have read the documentation also, but i can't find anything... There is a way manage a progress bar for @"me/videos" ?