my code： https://github.com/artemzakholodilo/murkatest/blob/master/src/MailerBundle/DependencyInjection/MailerExtension.php
如果我写 ./bin/console 调试：容器，我会看到这个服务
似乎您的控制器未定义为服务，因此您可以在控制器中将该服务用作：
/**
* @param Request $request
* @return 'Symfony'Component'HttpFoundation'Response
*/
public function sendAction(Request $request)
{
$notification = new Notification();
$user = $this->get('security.token_storage')->getToken()->getUser();
$notification->setBody($request->request->get('subject'), $user->getUsername());
$notification->setSubject($request->request->get('body'));
try {
$this->get('emailsender')->send($notification);
} catch ('Exception $ex) {
$this->render('MailerBundle:Email:error.html.twig', [
'message' => $ex->getMessage()
]);
}
$this->render('MailerBundle:Email:success.html.twig');
}
希望这个帮助