jili2/application/cron/ConveyCron.php

<?php
namespace app\cron;

use app\common\util\AppMsg;
use think\Db;
use yunwuxin\cron\Task;

class ConveyCron extends Task
{
    public function configure()
    {
        $this->dailyAt("00:00"); //每天执行一次
    }

    /**
     * 执行任务
     * @return mixed
     */
    protected function execute()
    {
        try{
           model("ConveyCron")->plan();
        }catch (\Exception $e){
            trace($e->getMessage());
        }

    }

}