带有弹出窗口的Drupal 8自定义表单

我想在弹出窗口中显示我的自定义表单，当用户单击前端的链接时，我尝试了许多在web中显示的解决方案，但不适合我

这是我的密码

        $response = new AjaxResponse();
        // Get the modal form using the form builder.
        $modal_form = $this->formBuilder->getForm('Drupal\fwsactions\Forms\FwsActionsForm');
        $modal_form['#attached']['library'][] = 'core/drupal.dialog.ajax';
        // Add an AJAX command to open a modal dialog with the form as the content.
        $modal_form = render($modal_form);
        $response->addCommand(new OpenModalDialogCommand('My Modal Form', $modal_form, ['width' => '800']));

        return $response;

我应该怎么做才能仅通过单击链接打开此表单

$content['overlay_link'] = array(
     '#type' => 'link',
     '#title' => $this->t('Add movie'),
     '#url' => Url::fromRoute('node.add', ['node_type' => 'content_type_movie']),
     '#attributes' => [
       'class' => ['use-ajax'],
       'data-dialog-type' => 'modal',
       'data-dialog-options' => Json::encode([
         'width' => 700,
       ]),
     ],
   );

请查看更多详细信息。 这里还有一个可能会有所帮助，虽然两者都是相同的，但仍然是共享的

希望这有帮助