我无法在EasyAdmin3 Symfony4中上传照片

use Symfony\Component\HttpFoundation\File\File;
use Vich\UploaderBundle\Mapping\Annotation as Vich;

/**
 * @ORM\Entity
 * @Vich\Uploadable
 */
class YourEntity
{
    /**
     * @ORM\Column(type="string", length=255, nullable=true)
     */
    private $photo;

    /**
     * @Vich\UploadableField(mapping="entity_photo", fileNameProperty="photo")
     * @var File
     */
    private $photoFile;

    // getter and setter methods for $photo and $photoFile

    // ...
}

composer require vich/uploader-bundle

# config/packages/vich_uploader.yaml
vich_uploader:
    db_driver: orm

    mappings:
        entity_photo:
            uri_prefix: /photos
            upload_destination: '%kernel.project_dir%/public/photos'
            namer: Vich\UploaderBundle\Naming\OrignameNamer
            inject_on_load: true
            delete_on_update: true
            delete_on_remove: true

# config/packages/easy_admin.yaml
easy_admin:
    entities:
        YourEntity:
            class: App\Entity\YourEntity
            form:
                fields:
                    - { property: 'name' }
                    - { property: 'photoFile', type: 'file', label: 'Photo' }

// src/Controller/YourEntityController.php
use EasyCorp\Bundle\EasyAdminBundle\Controller\AbstractCrudController;
use Symfony\Component\HttpFoundation\File\UploadedFile;

class YourEntityController extends AbstractCrudController
{
    public function configureFields(string $pageName): iterable
    {
        // ...

        yield TextField::new('name');
        yield AssociationField::new('photoFile')->setFormType(VichImageType::class);
    }

    public function updateEntity(EntityManagerInterface $entityManager, $entityInstance): void
    {
        if ($entityInstance instanceof YourEntity) {
            // Handle file upload
            $photoFile = $entityInstance->getPhotoFile();
            if ($photoFile instanceof UploadedFile) {
                $entityInstance->setPhoto($photoFile->getClientOriginalName());
            }
        }

        parent::updateEntity($entityManager, $entityInstance);
    }
}

<!-- templates/admin/your_entity/edit.html.twig -->
{% extends '@EasyAdmin/default/edit.html.twig' %}

{% block body_id 'easyadmin-edit-YourEntity' %}

{% block body_content %}
    <h1>{{ block('page_title') }}</h1>

    {{ form_start(edit_form) }}
        {{ form_row(edit_form.name) }}
        {{ form_row(edit_form.photoFile) }}
        {# ... other fields ... #}

        <button class="btn btn-primary" type="submit">{{ 'Save'|trans }}</button>
        <a href="{{ path('admin', { entity: 'YourEntity' }) }}" class="btn btn-secondary">{{ 'Cancel'|trans }}</a>
    {{ form_end(edit_form) }}
{% endblock %}