Qt利用QUdpSocket实现UDP点对点发送char*(QtToQt)

相关资料：

https://download.csdn.net/download/zhujianqiangqq/47534759       代码包下载

udpsend.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QDateTime>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

struct WeaponInfo
{
    unsigned int type;
    unsigned int quantity;
};
struct PlaneInfo
{
    double longitude;
    double latitude;
    double height;
    WeaponInfo weapons[10];
};
struct PlaneInfos
{
    unsigned int planeNumber;
    PlaneInfo info [8];
};


class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void on_pushButton_clicked();
    void on_Timer();
    void on_pushButton_2_clicked();

private:
    Ui::MainWindow *ui;
    QTimer *m_pTimer = NULL;
};
#endif // MAINWINDOW_H

udpsend.cpp主函数

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QByteArray>
#include <QCoreApplication>
#include <QUdpSocket>
#include <QTimer>

const quint16 PORT = 2333;

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    m_pTimer = new QTimer(this);
    m_pTimer->setSingleShot(false);
    m_pTimer->start(1000);
    connect(m_pTimer, &QTimer::timeout, this, &MainWindow::on_Timer);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_clicked()
{
    // 初始化UDP对象
    QUdpSocket oUDPSend;
    // 发送信息
    QDateTime sysDateTime;
    QByteArray msg = (sysDateTime.currentDateTime().toString("yyyy-MM-dd hh:mm:ss")+" \n").toLatin1();
    oUDPSend.writeDatagram(msg, QHostAddress("10.0.1.45"), PORT);// 需要先帮定127.0.0.1或10.0.1.45，都是本机IP
    // 输出信息（提示用，没有实际作用）
    ui->textEdit->insertPlainText(QStringLiteral("1"));
}

void MainWindow::on_Timer()
{
//    on_pushButton_clicked();
}

void MainWindow::on_pushButton_2_clicked()
{
    PlaneInfos oPlaneInfos;
    oPlaneInfos.planeNumber = 2;

    PlaneInfo oPlaneInfo1;
    oPlaneInfo1.longitude = 177;
    oPlaneInfo1.latitude = 23;
    WeaponInfo oWeaponInfo1;
    oWeaponInfo1.type = 11111;
    oWeaponInfo1.quantity =1;
    oPlaneInfo1.weapons[0] = oWeaponInfo1;

    PlaneInfo oPlaneInfo2;
    oPlaneInfo2.longitude = 113;
    oPlaneInfo2.latitude = 34;
    WeaponInfo oWeaponInfo2;
    oWeaponInfo2.type = 2222;
    oWeaponInfo2.quantity =1;
    oPlaneInfo2.weapons[0] = oWeaponInfo2;

    oPlaneInfos.info[0] = oPlaneInfo1;
    oPlaneInfos.info[1] = oPlaneInfo2;

    // 初始化UDP对象
    QUdpSocket oUDPSend;
    // 发送信息
    oUDPSend.writeDatagram((char*)&oPlaneInfos, sizeof(PlaneInfos), QHostAddress("10.0.1.45"), PORT);// 需要先帮定127.0.0.1或10.0.1.45，都是本机IP
    // 输出信息（提示用，没有实际作用）
    ui->textEdit->insertPlainText(QStringLiteral("char*\n"));
}

udpReceiver.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

#include <QObject>
#include <QUdpSocket>

const quint16 PORT = 2333;

struct WeaponInfo
{
    unsigned int type;
    unsigned int quantity;
};
struct PlaneInfo
{
    double longitude;
    double latitude;
    double height;
    WeaponInfo weapons[10];
};
struct PlaneInfos
{
    unsigned int planeNumber;
    PlaneInfo info [8];
};

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

public slots:
    void receive();


private:
    QUdpSocket *m_pUDPReceiver;

private:
    Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H

udpReceiver.cpp主函数

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    m_pUDPReceiver = new QUdpSocket;
    m_pUDPReceiver->bind(QHostAddress("10.0.1.45"), PORT);// 第一步：需要先帮定127.0.0.1或10.0.1.45，都是本机IP
    connect(m_pUDPReceiver, SIGNAL(readyRead()), this, SLOT(receive()));//第二步：帮定读取事件
}

MainWindow::~MainWindow()
{
    delete ui;
    delete m_pUDPReceiver;
}

void MainWindow::receive()
{
    QByteArray ba;
    PlaneInfos oPlaneInfos;
    while(m_pUDPReceiver->hasPendingDatagrams())
    {
        qDebug()<< "receive";
        ba.resize(m_pUDPReceiver->pendingDatagramSize());
        m_pUDPReceiver->readDatagram(ba.data(), ba.size());
        memcpy(&oPlaneInfos, ba.data(), sizeof(PlaneInfos));
        ui->textEdit->insertPlainText("Number" + QString::number(oPlaneInfos.planeNumber));
        ui->textEdit->append("");
        ui->textEdit->append("longitude" + QString::number(oPlaneInfos.info[0].longitude));
        ui->textEdit->append("latitude" + QString::number(oPlaneInfos.info[0].latitude));
        ui->textEdit->append("type" + QString::number(oPlaneInfos.info[0].weapons[0].type));
        ui->textEdit->append("quantity" + QString::number(oPlaneInfos.info[0].weapons[0].quantity));

        ui->textEdit->append("longitude" + QString::number(oPlaneInfos.info[1].longitude));
        ui->textEdit->append("latitude" + QString::number(oPlaneInfos.info[1].latitude));
        ui->textEdit->append("type" + QString::number(oPlaneInfos.info[1].weapons[0].type));
        ui->textEdit->append("quantity" + QString::number(oPlaneInfos.info[1].weapons[0].quantity));
        ui->textEdit->append("");
    }
}