UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
    imagePickerController.modalPresentationStyle = UIModalPresentationCurrentContext;
    imagePickerController.sourceType = sourceType;
    imagePickerController.delegate = self;

    if (sourceType == UIImagePickerControllerSourceTypeCamera) {
        imagePickerController.showsCameraControls = YES;
    }

    self.imagePickerController = imagePickerController;
    [self presentViewController:self.imagePickerController animated:YES completion:nil];

imagePickerController.modalPresentationStyle = UIModalPresentationFullScreen;
imagePickerController.modalTransitionStyle   = UIModalTransitionStyleCoverVertical;

imagePicker.setNavigationBarHidden(false, animated: false)

imagePicker.dismiss(animated: true)
imagePicker.setNavigationBarHidden(false, animated: false)