关于QT5使用QtScript解析QJsonArray数组的问题

include <QStringList>
#include <QtScript/QScriptEngine>
#include <QtScript/QScriptValue>
#include <QtScript/QScriptValueIterator>

QString strJson = "{ \"student\":[{\"Name\":\"ccf\",\"Math\":\"95\", \"Chinese\":\"84\"}, {\"Name\":\"zhangsan\",\"Math\":\"75\", \"Chinese\":\"70\"}]}";
        QScriptEngine engine;
        QScriptValue sc =  engine.evaluate("value=" + strResult);
        if (sc.property("dan").isArray())   //解析json数组
        {
            QScriptValueIterator it(sc.property("dan"));
            while(it.hasNext())
            {
                it.next();
                if (!it.value().property("type").toString().isEmpty())
                {
                    qDebug() << "type :" << it.value().property("type").toString();
                    qDebug() << "data :" << it.value().property("data").toString();
                    receMsg = it.value().property("data").toString();
                    qDebug() << "user :" << it.value().property("use").toString();

                    QDesktopWidget* desktopWidget;                                    //获取桌面设备
                    QRect screenRect;
                    desktopWidget = QApplication::desktop();                          //获取桌面设备
                    screenRect = desktopWidget->screenGeometry();                     //获取桌面大小的矩形
                    Danmu * danmu = new Danmu(NULL,receMsg,"Red",1,screenRect);
                    qDebug()<<"x"<<danmu->getPosX()<<" y"<<danmu->getPosY();

                }
            }
        }