blackberry-10 - 得到没有。级联接收和发送的字节数 bb 10

Question

我是级联编程的新手。我正在尝试开发一个可以给我接收和发送的字节数的应用程序。
我正在使用 QnetworkSession 方法bytesReceived()和bytesWritten()它，但得到错误。
任何帮助都是不言而喻的。

谢谢

代码：

#include "Monitor.hpp"    
#include <bb/cascades/Application>
#include <bb/cascades/QmlDocument>
#include <bb/cascades/AbstractPane>
#include <QtCore/QFile>
#include <QtNetwork/QNetworkSession>
#include <QtNetwork/QNetworkConfiguration>
#include <QtNetwork/QNetworkConfigurationManager>
using namespace bb::cascades;
QNetworkSession::QNetworkSession ( const QNetworkConfiguration & connectionConfig, QObject * parent = 0 );
Monitor::Monitor(bb::cascades::Application *app)
: QObject(app)
{
    QNetworkSession qnetworksession;
    // create scene document from main.qml asset
    // set parent to created document to ensure it exists for the whole application lifetime
    QmlDocument *qml = QmlDocument::create("asset:///main.qml").parent(this);
    qml->setContextProperty("app", this);
    // create root object for the UI
    AbstractPane *root = qml->createRootObject<AbstractPane>();
    // set created root object as a scene
    app->setScene(root);
}

quint64 Monitor::Received() const
{
    quint64 rec=qnetworksession.bytesReceived ();
    return(rec);
}


quint64 Monitor::Sent() const
{
    quint64 sen=qnetworksession.bytesWritten ();
    return(sen);
}