Symfony 4.1 -无法在自定义窗体基类中注入依赖项

namespace App\EventListener;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;

class DependencyInjectionListener implements EventSubscriberInterface
{
    private $dependency;

    public function __construct($dependency)
    {
        $this->dependency = $dependency;
    }

    public static function getSubscribedEvents()
    {
        return [
            FormEvents::PRE_SET_DATA => 'preSetData',
        ];
    }

    public function preSetData(FormEvent $event)
    {
        $form = $event->getForm();
        $form->add('dependency', HiddenType::class, [
            'data' => $this->dependency,
        ]);
    }
}

namespace App\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use App\EventListener\DependencyInjectionListener;

class MyBaseFormType extends AbstractType
{
    private $eventDispatcher;
    private $dependency;

    public function __construct(EventDispatcherInterface $eventDispatcher, $dependency)
    {
        $this->eventDispatcher = $eventDispatcher;
        $this->dependency = $dependency;
    }

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $this->eventDispatcher->addSubscriber(new DependencyInjectionListener($this->dependency));
        // 添加其他窗体字段和逻辑
    }

    // 其他窗体配置和方法
}