How do I use ReplayKit's class RPBroadcastActivityViewController?

Question

I want to present RPBroadcastActivityViewController, but fail. The sample code just present a black view.

- (IBAction)displayServiceViewController:(id)sender {
    RPBroadcastActivityViewController *rpBroadcastActivityViewController = [[RPBroadcastActivityViewController alloc] init];
    [self presentViewController:rpBroadcastActivityViewController animated:YES completion:nil];

}

I hope it's the following effect:

expected

Answer 1

- (IBAction)displayServiceViewController:(id)sender {
    [RPBroadcastActivityViewController loadBroadcastActivityViewControllerWithHandler:^(RPBroadcastActivityViewController * _Nullable broadcastActivityViewController, NSError * _Nullable error) {
        broadcastActivityViewController.delegate = self;
        [self presentViewController:broadcastActivityViewController animated:YES completion:nil];
    }];

}