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我正在寻找关于我的小程序的帮助。我想使用QNetwork类从网站下载安装程序(.exe)。我已经搜索并阅读了很多关于它的文章,但它不起作用。从网站下载文件
download.cpp:
Download::Download(QObject *parent) :
QObject(parent)
{
}
void Download::initialiseDownload()
{
QNetworkAccessManager manager;
QNetworkRequest request;
request.setUrl(QUrl("http://www.mylink.com/setup.exe"));
reply = manager.get(request);
QObject::connect(reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(downloadError(QNetworkReply::NetworkError)));
QObject::connect(reply, SIGNAL(downloadProgress(qint64, qint64)), this, SLOT(updateProgress(qint64, qint64)));
QObject::connect(reply, SIGNAL(finished()), this, SLOT(downloadFinished()));
}
void Download::downloadError(QNetworkReply::NetworkError err)
{
qDebug() << reply->errorString();
reply->deleteLater();
}
void Download::updateProgress(qint64 read, qint64 total)
{
qDebug() << "Progress...";
qint64 percent = (read/total) * 100;
qDebug() << percent;
}
void Download::downloadFinished()
{
qDebug() << "Finished !";
QByteArray b = reply->readAll();
QFile file("./sdk/setup.exe");
file.open(QIODevice::WriteOnly);
QDataStream out(&file);
out << b;
reply->deleteLater();
}
download.h:
#include "launcher.h"
#include <QObject>
#include <QtNetwork>
class Download : public QObject, public Launcher
{
Q_OBJECT
public:
explicit Download(QObject *parent = 0);
void Download::initialiseDownload();
private slots:
void downloadError(QNetworkReply::NetworkError err);
void updateProgress(qint64 read, qint64 total);
void downloadFinished();
private:
QNetworkReply *reply;
};
我已经添加了OpenSSL中的DLL和它的工作。我还在“.pro”文件中添加了“网络”。但是,当我运行我的程序时,我点击另一个类的按钮,initialiseDownload()正在工作,但信号似乎是不活动的。
在此先感谢!