QT QNetworkAccessManager内存泄漏,该怎么解决

QT QNetworkAccessManager内存泄漏
有一个纠结的问题，现做一个HTTP客户端，使用QNetworkAccessManager发现有内存泄漏现象，特意写了一个测试代码，如下：

nettest.h

C/C++ code

#ifndef NETTEST_H#define NETTEST_H#include <QtGui/QWidget>#include "ui_nettest.h"#include <QNetworkAccessManager>#include <QNetworkRequest>#include <QNetworkReply>class NetTest : public QWidget{    Q_OBJECTpublic:    NetTest(QWidget *parent = 0);    ~NetTest();private:    Ui::NetTestClass ui;    QNetworkAccessManager *qnam;    QNetworkRequest qnr;public slots:    void onSend();    void accept(QNetworkReply *r);};#endif // NETTEST_H

nettest.cpp

C/C++ code

#include "nettest.h"#include <QDebug>NetTest::NetTest(QWidget *parent)    : QWidget(parent){    ui.setupUi(this);    connect(ui.pushButton,SIGNAL(clicked()),this,SLOT(onSend()));    qnr.setUrl(QUrl("http://www.baidu.com/"));    qnam=new QNetworkAccessManager();    connect(qnam, SIGNAL(finished(QNetworkReply *)), this,SLOT(accept(QNetworkReply *)));}void NetTest::onSend(){    qDebug()<<"发送数据！";    qnam->get(qnr);}void NetTest::accept(QNetworkReply *r){    qDebug()<<"接收数据！";    qDebug()<<r->readAll();}

界面就是一个按钮，点击按钮触发onSend()；数据接受完成后触发accept(QNetworkReply *r)输出数据。

在实际运行中，不断点击发送按钮，程序所使用的内存不断增长，在accept()中delete r;也没用。

本人平台Ubuntu11.04 Qt4.7

求高手指教，怎样释放每一次网络请求后占用的内存。

[解决办法]
qnam=new QNetworkAccessManager(this);

& 

void QNetworkAccessManager::finished ( QNetworkReply * reply ) [signal]
This signal is emitted whenever a pending network reply is finished. The reply parameter will contain a pointer to the reply that has just finished. This signal is emitted in tandem with the QNetworkReply::finished() signal.

See QNetworkReply::finished() for information on the status that the object will be in.

Note: Do not delete the reply object in the slot connected to this signal. Use deleteLater().

See also QNetworkReply::finished() and QNetworkReply::error().

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