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我想用下面的代码下载网页的源代码 头文件:QNetworkAccessManager问题越来越网页
#include <QObject>
#include <QHttp>
#include <QtNetwork>
#include <QFile>
#include <QDebug>
class CDownloader : public QObject
{
Q_OBJECT
public:
explicit CDownloader(QObject *parent = 0);
void Do_Download();
signals:
public slots:
void result(QNetworkReply*);
private:
QNetworkAccessManager *manager;
QNetworkReply *reply;
QNetworkAccessManager qnam;
};
#endif // CDOWNLOADER_H
和源文件:
#include "cdownloader.h"
CDownloader::CDownloader(QObject *parent) :
QObject(parent)
{
}
void CDownloader::Do_Download()
{
manager = new QNetworkAccessManager(this);
connect(manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(result(QNetworkReply*)));
manager->get(QNetworkRequest(QUrl("http://www.google.com")));
}
void CDownloader::result(QNetworkReply *reply)
{
qDebug() << "loading complete";
}
和按钮代码:
void MainWindow::on_download_clicked()
{
CDownloader cDown;
cDown.Do_Download();
}
但是在结果插槽中永远不会调用qDebug。我错过了什么?
就我所见,您的代码看起来不错。介意发布完整的代码? –
@ion代码中存在内存泄漏。您必须在'finished()'处理程序中删除QNetworkReply。你可以使用'reply-> deleteLater()'。 –