/**
  * Lists all Notification models.
  * @return mixed
  */
 public function actionIndex()
 {
     $dataProvider = new ActiveDataProvider(['query' => Notification::find()->where(['user_id' => Yii::$app->user->id]), 'sort' => ['defaultOrder' => ['created_at' => SORT_DESC, 'id' => SORT_ASC]]]);
     $notifyCount = UserService::findNotifyCount();
     UserService::clearNotifyCount();
     return $this->render('index', ['dataProvider' => $dataProvider, 'notifyCount' => $notifyCount]);
 }