title: Using UIActivityViewController to share file will delete the file.Why?
body: <p>I try to share my mp3 songs from my app using UIActivityViewController.It pop the sharing action sheet and attached my file.After share or send it will delete from my app.Why?</p>
  
  <p>It is working good in ios7 but not working well in ios8.</p>
  
  <p>This is my code what I am done.</p>
  
  <pre><code> UIActivityViewController *avc = [[UIActivityViewController alloc] initWithActivityItems:
                                               @[@"Here's an attached mp3 File", fileURL] applicationActivities:nil];
  
              if ([avc respondsToSelector:@selector(popoverPresentationController)])
              {
                  // iOS 8+
                  UIPopoverPresentationController *presentationController = [avc popoverPresentationController];
  
                  presentationController.sourceView = self.view; 
              }
              [self presentViewController:avc animated:YES completion:nil];
  </code></pre>
  
  <p>Please help me...</p>