如何从Symfony2中的“\ Swift_Events_SendListener”事件中取消发送的电子邮件？

Question

关注this guide我已经设置了一个事件监听器：

<?php

class EmailListener implements \Swift_Events_SendListener
{
    public $beforeSendEvt = null;
    public $sendEvt = null;

    public function beforeSendPerformed(\Swift_Events_SendEvent $evt)
    {
        $this->beforeSendEvt = $evt;
    }

    public function sendPerformed(\Swift_Events_SendEvent $evt)
    {
        $this->sendEvt = $evt;
    }
}

现在，我想以beforeSendPerformed方式取消此电子邮件。我该怎么做？

Answer 1

大概：

$evt->cancelBubble();

https://github.com/swiftmailer/swiftmailer/blob/613354e08fbddce0943646932b007be9873c658f/lib/classes/Swift/Transport/AbstractSmtpTransport.php#L155-L158 https://github.com/swiftmailer/swiftmailer/blob/613354e08fbddce0943646932b007be9873c658f/lib/classes/Swift/Events/EventObject.php#L44-L62