iOS 9 UIDocumentInteractionController does not open file with the app - ios

Question

In previous iOS, I used this code and UIDocumentInteractionController to open a file, from my app, with another app. Since iOS 9, the UIDocumentInteractionController appears on the screen, I select the option "Copy to", but nothing happens. How can I solve this?
NSURL *URL = [NSURL fileURLWithPath:path];
if (URL != nil) {
// Initialize Document Interaction Controller
documentController = [UIDocumentInteractionController interactionControllerWithURL:URL];
documentController.delegate = self;
[documentController presentOpenInMenuFromRect:CGRectZero inView:self.view animated:YES];
}

Answer 1

you have to manage your response time of open :-
-(void)exportToDropBox{
[self performSelector:#selector(presentImagePicker) withObject:nil afterDelay:1.0];
}
-(void)presentImagePicker{
NSURL *targetURL = [NSURL fileURLWithPath:exportedPdfFileName];
[self presentDocumentWithURL2:targetURL];
}
- (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller{
return self;
}
- (void)presentDocumentWithURL2:(NSURL*)url {
self.documentController = [UIDocumentInteractionController interactionControllerWithURL:url];
self.documentController.delegate = self;
[self.documentController presentOpenInMenuFromRect:CGRectMake(self.view.frame.size.width/2 - 49/2, self.view.frame.size.height-49, 49, 49) inView:self.view animated:YES];
}
- (void)documentInteractionControllerDidEndPreview:(UIDocumentInteractionController *)controller {
self.documentController = nil;
}