- (void)scanBarcode {

    NSString* errorMessage = [self setUpCaptureSession];
    if (errorMessage) {
        [self barcodeScanFailed:errorMessage];
        return;
    }

    self.viewController = [[CDVbcsViewController alloc] initWithProcessor: self alternateOverlay:self.alternateXib];
    // here we set the orientation delegate to the MainViewController of the app (orientation controlled in the Project Settings)
    self.viewController.orientationDelegate = self.plugin.viewController;

    //Here add for ios 13 set view controller to fullscreen
    if (@available(iOS 13.0, *)) {
         [self.viewController setModalPresentationStyle: UIModalPresentationFullScreen];
    }

    // delayed [self openDialog];
    [self performSelector:@selector(openDialog) withObject:nil afterDelay:1];
}