请问一下为什么一定要用一个 run 方法呢？ [ 2.0 版本 ]

<?php
namespace app\common\widgets\right;
use yii\db\Query;
use yii\base\Widget;
use app\common\DataCache;

class TaskWidget extends Widget
{

    public $items = [];

    public function init()
    {
        //首页前十条的最新需求
        $task['top_new_task'] = DataCache::getHomeTask(1);
        $task['top_hot_task'] = DataCache::getHomeHotTask(1);
        $this->items = $task;
    }

    public function run()
    {

        $taskList = $this->items;

        //print_r($starList);die;
        return $this->render('task', [
            'task' => $taskList
        ]);
    }
}