yii 事件简单使用

<?php

namespace app\modules\test\controllers;

use yii\web\Controller;
use common\models\User;
use yii\base\Component;
use yii\base\Object;
use yii\base\Event;


/**
 * Default controller for the `test` module
 * yii  事件简单使用
 */
class DefaultController extends Controller
{
    
    const TEST_EVENT = 'say';
    
    const TEST_EVENT_PASRAM = 'param';
    
    public function say()
    {
        echo  'hello world';
    }
    
    public function init()
    {
        parent::init();
        
        $this->on(self::TEST_EVENT,[$this,'say']);
       
        $this->on(self::TEST_EVENT_PASRAM,[$this,'Ontest'],$this->actionTest());  
    }
    
    
    public function actionIndex()
    {
        $this->trigger(self::TEST_EVENT);
    }
    
    public function actionTest()
    {
        $msgEvent = new MsgEvent();
        $msgEvent->dateTime = 'TestdateTime';
        $msgEvent->author = 'Testauthor';
        $msgEvent->content = 'Testcontent';
        $this->trigger(self::TEST_EVENT_PASRAM,$msgEvent);  //参数是实例化的对象
    }
    
    public function onTest(\yii\base\Event $event)
    {
        var_dump($event->author);
        var_dump($event->dateTime);
        var_dump($event->content);
        var_dump($event->data);
        
    }
}

class MsgEvent extends Event //需要继承event
{
    public $dateTime;
    public $author; 
    public $content;
    
}