/** 修改状态 */
 public function actionChangeState()
 {
     $request = Yii::$app->request;
     if ($request->isPost) {
         $infoId = $request->post('infoId');
         $state = $request->post('state');
         if ($state == 'ok') {
             if ($result = Info::changeState($infoId, Info::STATE_PASS)) {
                 return $result;
             }
         } elseif ($state == 'error') {
             $replyContent = $request->post('replyContent');
             if ($result = Info::changeState($infoId, Info::STATE_REFUSE, $replyContent)) {
                 return $result;
             }
         } else {
             return "状态未定义";
         }
         return 'ok';
     } else {
         throw new Exception("非正常请求");
     }
 }