Symfony 2:如何在控制器外部或服务中呈现模板?

I've been following the documentation of Symfony2. Docnamespace Acme\HelloBundle\Newsletter;use Symfony\Component\Templating\EngineInterface;class NewsletterManager{ protected $mailer; protected $templating; public function __construct( \Swift_Mailer $mailer, EngineInterface $templating ) { $this->mailer = $mailer; $this->templating = $templating; } // ...}这是我打电话给我的帮手的地方:This is where i call my helper :$transport = \Swift_MailTransport::newInstance();$mailer = \Swift_Mailer::newInstance($transport);$helper = new MailHelper($mailer);$helper->sendEmail($from, $to, $subject, $path_to_twig, $arr_to_twig);所以这里缺少的第一件事是构造方法的第二个参数:So the first thing here missing is the second parameter of the construct method in :$helper = new MailHelper($mailer);但是我将如何实例化 EngineInterface?But how would i instantiate the EngineInterface?当然不可能:new EngineInterface();我完全迷失在这里.我需要做的就是为正在发送的电子邮件呈现一个模板.All what i need to do is render a template for the email that is being sent. 推荐答案只注入 @twig 并将渲染的模板传递给邮件程序主体:Inject only @twig and pass the rendered template to the mailer body:<?phpnamespace Acme\Bundle\ContractBundle\Event;use Acme\Bundle\ContractBundle\Event\ContractEvent;class ContractListener{ protected $twig; protected $mailer; public function __construct(\Twig_Environment $twig, \Swift_Mailer $mailer) { $this->twig = $twig; $this->mailer = $mailer; } public function onContractCreated(ContractEvent $event) { $contract = $event->getContract(); $body = $this->renderTemplate($contract); $projectManager = $contract->getProjectManager(); $message = \Swift_Message::newInstance() ->setSubject('Contract ' . $contract->getId() . ' created') ->setFrom('[email protected]') ->setTo('[email protected]') ->setBody($body) ; $this->mailer->send($message); } public function renderTemplate($contract) { return $this->twig->render( 'AcmeContractBundle:Contract:mailer.html.twig', array( 'contract' => $contract ) ); }} 这篇关于Symfony 2:如何在控制器外部或服务中呈现模板?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！