QJson解析

//解析Json格式
    QJson::Parser*parser=new QJson::Parser();
    QString byte = QString(Respond);
    QVariant result = parser->parse(byte.toAscii(), &ok);
    QList<QVariant> list = result.toList();

    if(list.count() == 1 && list.at(0).toMap()["retMgs"].toString() != "success"){
        qDebug("该网关控制设备暂未进行任何操作");
        return ;
    }
    if(list.isEmpty()){
        qDebug("list.isEmpty()");
        return ;
    }
    App::cmdList.clear();
    QString cmdString;
    foreach(QVariant variant,list)
    {
      QVariantMap mymap = variant.toMap();
        cmdString = mymap["nd_device_id"].toString() + ":" + mymap["cur_state"].toString();
        App::cmdList.append(cmdString);
        qDebug()<<"cmdString:"<<cmdString;


    }