public function actionUpdateStatus()
 {
     $status = Yii::$app->request->post('status');
     $idList = Yii::$app->request->post('selection');
     if (!empty($status) && !empty($idList)) {
         foreach ($idList as $key => $val) {
             ActivityUsers::updateAll(['status' => $status], ['id' => $val]);
             if ($status == ActivityUsers::ENROLL) {
                 $activityUsersInfo = ActivityUsers::findOne($val);
                 //录取发送系统通知
                 $content = "尊敬的学员,您已经被成功录取,序号为" . $activityUsersInfo['orders'] . ",请缴费,谢谢!【教练系统】";
                 $userInfo = Users::findOne(['id' => $activityUsersInfo['user_id']]);
                 $result = $this->sendMessage($content, Messages::ACTIVITY_SIGN_SUCCESS, $activityUsersInfo['user_id'], $userInfo['mobile_phone']);
                 if ($result != '0') {
                     throw new ServerErrorHttpException('更新状态错误,原因:' . $result . '!');
                 }
             }
         }
         return $this->redirect(Yii::$app->request->referrer);
     } else {
         throw new ServerErrorHttpException('更新状态错误,原因:请选择评分信息!');
     }
 }