Qt 解释JSon数据

jsondata={"cmd":"meetingmemberlist","memberinfos":[{"name":"李","number":"668162","status":"Offline"},{"name":"66668888","status":"Offline"},{"name":"1.221","number":"1234561","status":"Offline"},{"name":"1.42","status":"Offline"}],"session":"2989479764ll","touid":"19","xns":"18"}

void  CEMViewMenuInteraction::get_memberdata_from_jsondate(std::string jsondata)
{
    QByteArray ByteArr = QByteArray(jsondata.c_str());
    //判断字符串转化为 QJsonDocument  是否出现了错误
    QJsonParseError jsonError;//Qt5新类
    QJsonDocument jsonDoc = QJsonDocument::fromJson(ByteArr, &jsonError);//Qt5新类
    if (jsonError.error == QJsonParseError::NoError)
   {
//        qDebug()<< "parse jsondata";
       if (jsonDoc.isObject())
       {
           QJsonObject rootObj = jsonDoc.object();
           QString cmd;
           QString session;
           //是否含有key  cmd
           if (rootObj.contains("cmd"))
           {
               //取出key为rootpath的值
               QJsonValue value = rootObj.value("cmd");
               //判断是否是string类型
               if (value.isString())
               {
                   cmd = value.toString();
//                   qDebug()<< "cmd=" <<cmd;
               }
           }
           if (rootObj.contains("session"))
           {
               //取出key为 session 的值
               QJsonValue value = rootObj.value("session");
               //判断是否是string类型
               if (value.isString())
               {
                   session = value.toString();
//                   qDebug()<< "session=" << session;
               }
           }
           if (rootObj.contains("memberinfos"))
           {
               QJsonValue valueArray = rootObj.value("memberinfos");
               //判断类型是否为array，并且将array遍历出来
               if (valueArray.isArray())
               {
                   QJsonArray jsonArray = valueArray.toArray();
                   QString child_name = "null";
                   QString child_status = "null";
                   for (int i = ; i < jsonArray.count();i++)
                   {
                       QJsonValue childValue = jsonArray[i];
                       if (childValue.isObject())
                       {
                           QJsonObject  childObject = childValue.toObject();
                           if (childObject.contains("name"))
                           {
                               QJsonValue valueJson = childObject.value("name");
                               if (valueJson.isString())
                               {
                                   child_name = valueJson.toString();
//                                   qDebug()<< "name=" <<child_name;
                               }
                           }
                           if (childObject.contains("status"))
                           {
                               QJsonValue valueJson = childObject.value("status");
                               if (valueJson.isString())
                               {
                                   child_status = valueJson.toString();
//                                   qDebug()<< "status=" <<child_status;
                               }
                           }
                           m_MemberListMap[child_name] = child_status;
                       }
                   }
               }
           }

       }
   }
}