public function detail()
    {
        $where=UtilService::getMore([
            ['id',0],
        ]);

        $info=NewsModel::where(['is_del'=>0,'is_show'=>1,'id'=>$where['id']])->find();
        if(!$info)
        {
            throw new \think\exception\HttpException(404, '数据不存在');
            die;
        }
        $info=$info->toArray();
        $info['cat_name']=NewsCategory::where('id',$info['cat_id'])->value('title');
        $this->assign('info',$info);

        $pre=NewsModel::where(['is_del'=>0,'is_show'=>1])->field('id,title')->where('show_time','<',$info['show_time'])->order('show_time desc')->find();
        if($pre)
            $pre=$pre->toArray();