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']]));
     }