调度员不调度我的事件 symfony [英] dispatcher doesn't dispatch my event symfony

问题描述

我有一个 ExampleListener 类，如下所示:

I have an ExampleListener class that look like :

<?php

namespace AppBundle\EventListener;

class ExampleListener
{
    public function helloWorld()
    {
        echo "Hello World!";
    }
}

这是我的 services.yml

This is my services.yml

services:
    my.event:
        class: AppBundle\EventListener\ExampleListener
        tags:
            - { name: kernel.event_listener, event: my.event, method: helloWorld }

然后从控制器我试图调度事件.

And then from controller i'm trying to dispatch the event.

$dispatcher = new EventDispatcher();
$dispatcher->dispatch('my.event')

我没有任何错误，但从未调用 helloWorld 函数.我的活动结束了:

I don't have any error but the helloWorld function is never called. My event is up :

php bin/console debug:event-dispatcher my.event

php bin/console debug:event-dispatcher my.event

结果是:

#1      AppBundle\EventListener\ExampleListener::helloWorld()   0

为什么调度员没有正确调用事件?谢谢.

Why dispatcher doens't call the event right? Thanks.

推荐答案

您创建了一个新的事件调度程序，这与 Symfony 用于注册您在容器配置中定义的事件侦听器不同.

You have created a new event dispatcher, which is not the same as Symfony uses to register event listeners you define in you container configuration.

不要自己创建事件调度程序，而是使用 Symfony 已经定义的事件调度程序.您可以从容器中获取它，例如在控制器中:

Instead of creating the event dispatcher yourself, use the one that's already defined by Symfony. You can fetch it from the container, for example in a controller:

$this->container->get('event_dispatcher')->dispatch('my.event');

如果您需要从服务调度事件，只需将 event_dispatcher 服务作为构造函数参数之一传递:

If you need to dispatch your event from a service, simply pass the event_dispatcher service as one of constructor arguments:

services:
    my_service:
        class: Foo\MyService
        arguments:
            - @event_dispatcher

这篇关于调度员不调度我的事件 symfony的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！