1、概述
源码放在文章末尾

该项目基于QT+QML实现了文件传输的功能，可以在局域网环境下使用(热点)，扫描使用UDP，传输使用TCP，每一个文件传输使用独立的线程进行处理，高效便捷。

开发环境
使用Qt/Qml开发
QT版本：Qt 5.13.0
基本未使用高版本特性，保证Qt Version >= 5.0即可，建议是Qt 5.5 ~ 5.7

项目demo演示如下：

项目部分代码如下所示：

#ifndef FILEMANAGER_H
#define FILEMANAGER_H

#include <QObject>
#include <QQmlListProperty>

class FileInfo : public QObject
{
    Q_OBJECT

    Q_PROPERTY(QString fileName READ fileName WRITE setFileName NOTIFY fileNameChanged)
    Q_PROPERTY(int offset READ offset WRITE setOffset NOTIFY offsetChanged)
    Q_PROPERTY(int fileSize READ fileSize WRITE setFileSize NOTIFY fileSizeChanged)

public:
    FileInfo(QObject *parent = nullptr);
    FileInfo(const FileInfo &other, QObject *parent = nullptr);
    FileInfo(const QString &fileName, int offset, int fileSize, QObject *parent = nullptr);
    ~FileInfo();

    QString fileName() const;
    void setFileName(const QString &fileName);

    int offset() const;
    void setOffset(int offset);

    int fileSize() const;
    void setFileSize(int fileSize);

signals:
    void fileNameChanged();
    void offsetChanged();
    void fileSizeChanged();

private:
    QString m_fileName;
    int m_offset;
    int m_fileSize;
};

class FileManager : public QObject
{
    Q_OBJECT

    Q_PROPERTY(QQmlListProperty<FileInfo> readFiles READ readFiles NOTIFY readFilesChanged)
    Q_PROPERTY(QQmlListProperty<FileInfo> writeFiles READ writeFiles NOTIFY writeFilesChanged)

public:
    static FileManager* instance();
    ~FileManager();

    QQmlListProperty<FileInfo> readFiles();
    QQmlListProperty<FileInfo> writeFiles();

public slots:
    void addReadFile(const QString &fileName, qint32 totalSize);
    void updateReadFile(const QString &fileName, qint32 offset);

    void addWriteFile(const QString &fileName, qint32 totalSize);
    void updateWriteFile(const QString &fileName, qint32 offset);

signals:
    void readFilesChanged();
    void writeFilesChanged();
    void readFileComplete(const QString &fileName);
    void writeFileComplete(const QString &fileName);

private:
    FileManager(QObject *parent = nullptr);

    QHash<QString, FileInfo*> m_filesTable;
    QList<FileInfo *> m_readFiles;
    QQmlListProperty<FileInfo> *m_readFilesProxy;
    QList<FileInfo *> m_writeFiles;
    QQmlListProperty<FileInfo> *m_writeFilesProxy;
};

#endif // FILEMANAGER_H

#include "filemanager.h"
#include <QDebug>

FileInfo::FileInfo(QObject *parent)
    : QObject (parent)
{

}

FileInfo::FileInfo(const FileInfo &other, QObject *parent)
    : QObject (parent),
      m_fileName(other.m_fileName),
      m_offset(other.m_offset),
      m_fileSize(other.m_fileSize)
{

}

FileInfo::FileInfo(const QString &fileName, int offset, int fileSize, QObject *parent)
    : QObject (parent),
      m_fileName(fileName),
      m_offset(offset),
      m_fileSize(fileSize)
{

}

FileInfo::~FileInfo()
{

}

QString FileInfo::fileName() const
{
    return m_fileName;
}

void FileInfo::setFileName(const QString &fileName)
{
    if (fileName != m_fileName) {
        m_fileName = fileName;
        emit fileNameChanged();
    }
}

int FileInfo::offset() const
{
    return m_offset;
}

void FileInfo::setOffset(int offset)
{
    if (offset != m_offset) {
        m_offset = offset;
        emit offsetChanged();
    }
}

int FileInfo::fileSize() const
{
    return m_fileSize;
}

void FileInfo::setFileSize(int fileSize)
{
    if (fileSize != m_fileSize) {
        m_fileSize = fileSize;
        emit fileSizeChanged();
    }
}


FileManager* FileManager::instance()
{
    static FileManager fileManager;
    return &fileManager;
}

FileManager::FileManager(QObject *parent)
    : QObject (parent)
{
    m_readFilesProxy = new QQmlListProperty<FileInfo>(this, m_readFiles);
    m_writeFilesProxy = new QQmlListProperty<FileInfo>(this, m_writeFiles);
}

FileManager::~FileManager()
{

}

QQmlListProperty<FileInfo> FileManager::readFiles()
{
    return *m_readFilesProxy;
}

QQmlListProperty<FileInfo> FileManager::writeFiles()
{
    return *m_writeFilesProxy;
}

void FileManager::addReadFile(const QString &fileName, qint32 totalSize)
{
    FileInfo *info = new FileInfo(fileName, 0, totalSize, this);
    m_readFiles.append(info);
    m_filesTable[fileName] = info;
    emit readFilesChanged();
}

void FileManager::updateReadFile(const QString &fileName, qint32 offset)
{
    FileInfo *info = m_filesTable[fileName];
    if (info) {
        info->setOffset(offset);
        if (offset == info->fileSize()) {
            m_filesTable.remove(fileName);
            emit writeFileComplete(fileName);
        }
    }
}

void FileManager::addWriteFile(const QString &fileName, qint32 totalSize)
{
    FileInfo *info = new FileInfo(fileName, 0, totalSize, this);
    m_writeFiles.append(info);
    m_filesTable[fileName] = info;
    emit writeFilesChanged();
}

void FileManager::updateWriteFile(const QString &fileName, qint32 offset)
{
    FileInfo *info = m_filesTable[fileName];
    if (info) {
        info->setOffset(offset);
        if (offset == info->fileSize()) {
            m_filesTable.remove(fileName);
            emit writeFileComplete(fileName);
        }
    }
}

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