qt http下载图片和mp3文件

以下是使用Qt进行http下载图片和mp3文件的示例代码：

1. 下载图片

QUrl url("https://example.com/image.png");
QNetworkAccessManager manager;
QNetworkReply *reply = manager.get(QNetworkRequest(url));
QEventLoop loop;
QObject::connect(reply, &QNetworkReply::finished, &loop, &QEventLoop::quit);
loop.exec();
if (reply->error() == QNetworkReply::NoError) {
    QByteArray data = reply->readAll();
    QPixmap pixmap;
    pixmap.loadFromData(data);
    // 将pixmap保存到本地文件
    pixmap.save("image.png");
}
reply->deleteLater();

2. 下载mp3文件

QUrl url("https://example.com/song.mp3");
QNetworkAccessManager manager;
QNetworkReply *reply = manager.get(QNetworkRequest(url));
QEventLoop loop;
QObject::connect(reply, &QNetworkReply::finished, &loop, &QEventLoop::quit);
loop.exec();
if (reply->error() == QNetworkReply::NoError) {
    QByteArray data = reply->readAll();
    QFile file("song.mp3");
    if (file.open(QIODevice::WriteOnly)) {
        file.write(data);
        file.close();
    }
}
reply->deleteLater();