course-site/app/Mail/NoticeMail.php

<?php

namespace App\Mail;

use Illuminate\Bus\Queueable;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;

class NoticeMail extends Mailable
{
    use Queueable, SerializesModels;

    protected $body = [];
    protected $title = [];

    /**
     * 创建一个新消息实例。
     *
     * @return void
     */
    public function __construct($title, $body)
    {
        $this->title = $title;
        $this->body = $body;
    }

    /**
     * 构建消息。
     *
     * @return $this
     */
    public function build()
    {
        return $this->view('emails.information')->subject($this->title)->with(['body' => $this->body]);
    }
}