Qt文件下载工具

这里写自定义目录标题

Qt文件下载工具

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最近为了一个程序的升级研究了一个下载工具，可以实现进度查看，下载完成后提示，下载文件大小计算等。

class QDownFileObject : public QObject
{
    Q_OBJECT
public:
    explicit QDownFileObject(QObject *parent = nullptr);
    ~QDownFileObject();


public slots:
    bool useCustomInstallProcedures() const;

    QString downloadDir() const;
    void setDownloadDir(const QString& downloadDir);

signals:
    void downloadFinished (const QString& url, const QString& filepath);
public slots:
    void setUrlId (const QString& url);
    void startDownload (const QUrl& url);
    void setFileName (const QString& file);
    void setUserAgentString (const QString& agent);
    void setUseCustomInstallProcedures (const bool custom);

private slots:
    void finished();
    void openDownload();
    void installUpdate();
    void cancelDownload();
    void saveFile (qint64 received, qint64 total);
    void calculateSizes (qint64 received, qint64 total);
    void updateProgress (qint64 received, qint64 total);
    void calculateTimeRemaining (qint64 received, qint64 total);
private:
    qreal round (const qreal& input);
private:
    QString m_url;
    uint m_startTime;
    QDir m_downloadDir;
    QString m_fileName;
    QNetworkReply* m_reply;
    QString m_userAgentString;
    bool m_useCustomProcedures;
    QNetworkAccessManager* m_manager;