Yii中事件触发机制

控制器初始化中添加事件处理方法，在需要触发的地方直接触发

    public function init()
    {
        parent::init(); // TODO: Change the autogenerated stub
        Yii::$app->on('yii2event',function($event){
            $args=$event->sender;
            echo $args['name'];
            echo "<br/>";
            Yii::$app->off('yii2event');
        });
    }
    public function actionYii2event(){
        Yii::$app->trigger('yii2event',new Event(['sender'=>['age'=>18,'sex'=>'mail','name'=>'Hello world']]));
    }