QNetworkReply * QNetworkAccessManager::get ( const QNetworkRequest & request )
大概可以这样用.
QIODevice* m_reply;
QNetworkAccessManager* m_manager = new QNetworkAccessManager;
m_reply = m_manager->get(QNetworkRequest(QUrl(_url)));
connect(m_reply,SIGNAL(readyRead()),this,SLOT(getData()));
在getData()里用 m_reply->readAll();
相关的类都看下qt assistant.