Symfony dustin10 10/VichUploaderBundle事件

Question

我正在使用dustin10 10/VichUploaderBundle上传图片。

我正在使用Gregwar/ImageBundle来调整图像的大小。

dustin10 10/VichUploaderBundle有一个POST_UPLOAD事件。我怎么触发这个事件。我读过这些文档，但没有说明如何触发这些事件。

https://github.com/dustin10/VichUploaderBundle/blob/master/Event/Events.php

我们的计划是在上传后用ImageBundle调整图片的大小。

S

Answer 1

您不能“触发”事件，它已经触发了这里

   /**
     * Checks for file to upload.
     *
     * @param object $obj       The object.
     * @param string $fieldName The name of the field containing the upload (has to be mapped).
     */
    public function upload($obj, $fieldName)
    {
        $mapping = $this->getMapping($obj, $fieldName);
        // nothing to upload
        if (!$this->hasUploadedFile($obj, $mapping)) {
            return;
        }
        $this->dispatch(Events::PRE_UPLOAD, new Event($obj, $mapping));
        $this->storage->upload($obj, $mapping);
        $this->injector->injectFile($obj, $mapping);
        $this->dispatch(Events::POST_UPLOAD, new Event($obj, $mapping));
    }

你能做的就是处理这件事，我认为这就是你所指的。您可以通过创建一个如概述的这里那样的侦听器来做到这一点。侦听器将监听POST_UPLOAD事件，如下所示：

# app/config/services.yml
services:
    app_bundle.listener.uploaded_file_listener:
        class: AppBundle\EventListener\UploadedFileListener
        tags:
            - { name: kernel.event_listener, event: vich_uploader.post_upload, method: onPostUpload }

您的侦听器类将为vich uploader事件键入提示，如下所示：

// src/AppBundle/EventListener/AcmeRequestListener.php
namespace AppBundle\EventListener;

use Symfony\Component\HttpKernel\HttpKernel;
use Vich\UploaderBundle\Event\Event;

class UploadedFileListener
{
    public function onPostUpload(Event $event)
    {
        $uploadedFile = $event->getObject();
        // your custom logic here
    }
}