'Swift_SmtpTransport',                'host' => 'smtp.163.com',                'username' => 'xxx@163.com',                'password' => 'xxx',                'port' => '994',                'encryption' => 'ssl', //ssl tls            ];            self::$obj = \Yii::createObject([                    'class' => 'yii\swiftmailer\Mailer',                    'viewPath' => '@common/mail',                    'useFileTransport' => false,                    'transport' => self::$config,            ]);        }        return self::$obj;    }    public static function send($toEmail, $subject, array $compose)    {        $user = \Wskm::getUser();                if ($compose) {
    　　　　　　　　//同时设置2种内容，让用户的偏好自己选择            self::getMailer()->compose(                    //['html' => 'passwordResetToken-html', 'text' => 'passwordResetToken-text'], ['user' => $user]                    //['html' => 'passwordResetToken-html'], ['user' => $user]                    $compose            );        }else{            self::getMailer()->setBody('My amazing body', 'text/html');            self::getMailer()->addPart('My amazing body in plain text', 'text/plain');        }        //https://swiftmailer.symfony.com/docs/messages.html                //addTo addCc addBcc        //$message->setTo(['some@address.tld', 'other@address.tld']);        //$message->setCc([        //    'person1@example.org', 'person2@otherdomain.org' => 'Person 2 Name',        //]);                //->attach(Swift_Attachment::fromPath('my-document.pdf')->setFilename('cool.jpg'))                /*        // Create the message        $message = new Swift_Message('My subject');        // Set the body        $message->setBody(        '' .        ' ' .        '  Here is an image ' .        '  Rest of message' .        ' ' .        '',          'text/html' // Mark the content-type as HTML        );         */                /*         * 验证            use Egulias\EmailValidator\EmailValidator;            use Egulias\EmailValidator\Validation\RFCValidation;            $validator = new EmailValidator();            $validator->isValid("example@example.com", new RFCValidation());         */                /*         *  加密            $smimeSigner = new Swift_Signers_SMimeSigner();            $smimeSigner->setSignCertificate('/path/to/certificate.pem', ['/path/to/private-key.pem', 'passphrase']);            $message->attachSigner($smimeSigner);         */                /*         * 回执            $MESSAGE->setReadReceiptTo（'你@地址。 TLD '）;         */                /**         * ->setCharset('iso-8859-2');    编码         * ->setPriority(2);                设置优先级，1-5         */                return self::getMailer()->compose(                    //['html' => 'passwordResetToken-html', 'text' => 'passwordResetToken-text'], ['user' => $user]                    ['html' => 'passwordResetToken-html'], ['user' => $user]                )                ->setFrom([ self::$config['username'] => 'test robot'])                ->setTo($toEmail)                ->setSubject($subject)                ->send();    }}