void MapDownload::download(const QString &path, int mapType, int downType, int xmin, int xmax, int ymin, int ymax, int zoom)
{
    for (int x = xmin; x <= xmax; x++) {
        for (int y = ymin; y <= ymax; y++) {
            if (stopped) {
                return;
            }

            QString url = getUrl(mapType, downType, x, y, zoom);
            QString dirName = QString("%1/%2/%3/").arg(path).arg(zoom).arg(x);
            QString fileName = QString("%1.jpg").arg(y);
            downloadImage(url, dirName, fileName, zoom);
        }
    }
}

void MapDownload::downloadBaiDu(const QString &path, int downType, int xmin, int xmax, int ymin, int ymax, int zoom)
{
    download(path, 0, downType, xmin, xmax, ymin, ymax, zoom);
}

void MapDownload::downloadTian(const QString &path, int downType, int xmin, int xmax, int ymin, int ymax, int zoom)
{
    download(path, 3, downType, xmin, xmax, ymin, ymax, zoom);
}

void MapDownload::downloadGoogle(const QString &path, int downType, int xmin, int xmax, int ymin, int ymax, int zoom)
{
    download(path, 4, downType, xmin, xmax, ymin, ymax, zoom);
}

void MapDownload::downloadImage(const QString &url, const QString &dirName, const QString &fileName, int zoom)
{
    if (url.isEmpty()) {
        return;
    }

    //啟動(dòng)計(jì)時(shí)
    QElapsedTimer time;
    time.start();

    //先判斷文件夾是否存在,不存在則新建
    QDir dir(dirName);
    if (!dir.exists()) {
        dir.mkpath(dirName);
    }

    //局部的事件循環(huán),不卡主界面
    QEventLoop eventLoop;

    //設(shè)置超時(shí) 5.15開(kāi)始自帶了超時(shí)時(shí)間函數(shù) 默認(rèn)30秒
#if (QT_VERSION >= QT_VERSION_CHECK(5,15,0))
    manager->setTransferTimeout(timeout);
#else
    QTimer timer;
    connect(&timer, SIGNAL(timeout()), &eventLoop, SLOT(quit()));
    timer.setSingleShot(true);
    timer.start(timeout);
#endif

    QNetworkReply *reply = manager->get(QNetworkRequest(QUrl(url)));
    connect(reply, SIGNAL(finished()), &eventLoop, SLOT(quit()));
    eventLoop.exec();

    bool error = false;
    if (reply->bytesAvailable() > 0 && reply->error() == QNetworkReply::NoError) {
        //讀取所有數(shù)據(jù)保存成文件
        QByteArray data = reply->readAll();
        QFile file(dirName + fileName);
        if (file.open(QFile::WriteOnly | QFile::Truncate)) {
            file.write(data);
            file.close();
        }
    } else {
        //可以自行增加下載失敗的統(tǒng)計(jì)
        error = true;
        qDebug() << TIMEMS << "下載出錯(cuò)" << reply->errorString();
    }

    reply->deleteLater();
    int useTime = time.elapsed();
    emit finsh(url, fileName, zoom, useTime, error);
}