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

 1 #ifndef MAINWINDOW_H
 2 #define MAINWINDOW_H
 3 
 4 #include 
 5 #include 
 6 
 7 QT_BEGIN_NAMESPACE
 8 namespace Ui { class MainWindow; }
 9 QT_END_NAMESPACE
10 
11 struct WeaponInfo
12 {
13     unsigned int type;
14     unsigned int quantity;
15 };
16 struct PlaneInfo
17 {
18     double longitude;
19     double latitude;
20     double height;
21     WeaponInfo weapons[10];
22 };
23 struct PlaneInfos
24 {
25     unsigned int planeNumber;
26     PlaneInfo info [8];
27 };
28 
29 
30 class MainWindow : public QMainWindow
31 {
32     Q_OBJECT
33 
34 public:
35     MainWindow(QWidget *parent = nullptr);
36     ~MainWindow();
37 
38 private slots:
39     void on_pushButton_clicked();
40     void on_Timer();
41     void on_pushButton_2_clicked();
42 
43 private:
44     Ui::MainWindow *ui;
45     QTimer *m_pTimer = NULL;
46 };
47 #endif // MAINWINDOW_H

udpsend.cpp主函数

 1 #include "mainwindow.h"
 2 #include "ui_mainwindow.h"
 3 #include 
 4 #include 
 5 #include 
 6 #include 
 7 
 8 const quint16 PORT = 2333;
 9 
10 MainWindow::MainWindow(QWidget *parent)
11     : QMainWindow(parent)
12     , ui(new Ui::MainWindow)
13 {
14     ui->setupUi(this);
15 
16     m_pTimer = new QTimer(this);
17     m_pTimer->setSingleShot(false);
18     m_pTimer->start(1000);
19     connect(m_pTimer, &QTimer::timeout, this, &MainWindow::on_Timer);
20 }
21 
22 MainWindow::~MainWindow()
23 {
24     delete ui;
25 }
26 
27 void MainWindow::on_pushButton_clicked()
28 {
29     // 初始化UDP对象
30     QUdpSocket oUDPSend;
31     // 发送信息
32     QDateTime sysDateTime;
33     QByteArray msg = (sysDateTime.currentDateTime().toString("yyyy-MM-dd hh:mm:ss")+" \n").toLatin1();
34     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
35     // 输出信息（提示用，没有实际作用）
36     ui->textEdit->insertPlainText(QStringLiteral("1"));
37 }
38 
39 void MainWindow::on_Timer()
40 {
41 //    on_pushButton_clicked();
42 }
43 
44 void MainWindow::on_pushButton_2_clicked()
45 {
46     PlaneInfos oPlaneInfos;
47     oPlaneInfos.planeNumber = 2;
48 
49     PlaneInfo oPlaneInfo1;
50     oPlaneInfo1.longitude = 177;
51     oPlaneInfo1.latitude = 23;
52     WeaponInfo oWeaponInfo1;
53     oWeaponInfo1.type = 11111;
54     oWeaponInfo1.quantity =1;
55     oPlaneInfo1.weapons[0] = oWeaponInfo1;
56 
57     PlaneInfo oPlaneInfo2;
58     oPlaneInfo2.longitude = 113;
59     oPlaneInfo2.latitude = 34;
60     WeaponInfo oWeaponInfo2;
61     oWeaponInfo2.type = 2222;
62     oWeaponInfo2.quantity =1;
63     oPlaneInfo2.weapons[0] = oWeaponInfo2;
64 
65     oPlaneInfos.info[0] = oPlaneInfo1;
66     oPlaneInfos.info[1] = oPlaneInfo2;
67 
68     // 初始化UDP对象
69     QUdpSocket oUDPSend;
70     // 发送信息
71     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
72     // 输出信息（提示用，没有实际作用）
73     ui->textEdit->insertPlainText(QStringLiteral("char*\n"));
74 }

udpReceiver.h

 1 #ifndef MAINWINDOW_H
 2 #define MAINWINDOW_H
 3 
 4 #include 
 5 
 6 #include 
 7 #include 
 8 
 9 const quint16 PORT = 2333;
10 
11 struct WeaponInfo
12 {
13     unsigned int type;
14     unsigned int quantity;
15 };
16 struct PlaneInfo
17 {
18     double longitude;
19     double latitude;
20     double height;
21     WeaponInfo weapons[10];
22 };
23 struct PlaneInfos
24 {
25     unsigned int planeNumber;
26     PlaneInfo info [8];
27 };
28 
29 QT_BEGIN_NAMESPACE
30 namespace Ui { class MainWindow; }
31 QT_END_NAMESPACE
32 
33 class MainWindow : public QMainWindow
34 {
35     Q_OBJECT
36 
37 public:
38     MainWindow(QWidget *parent = nullptr);
39     ~MainWindow();
40 
41 public slots:
42     void receive();
43 
44 
45 private:
46     QUdpSocket *m_pUDPReceiver;
47 
48 private:
49     Ui::MainWindow *ui;
50 };
51 #endif // MAINWINDOW_H

udpReceiver.cpp主函数

 1 #include "mainwindow.h"
 2 #include "ui_mainwindow.h"
 3 
 4 MainWindow::MainWindow(QWidget *parent)
 5     : QMainWindow(parent)
 6     , ui(new Ui::MainWindow)
 7 {
 8     ui->setupUi(this);
 9 
10     m_pUDPReceiver = new QUdpSocket;
11     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
12     connect(m_pUDPReceiver, SIGNAL(readyRead()), this, SLOT(receive()));//第二步：帮定读取事件
13 }
14 
15 MainWindow::~MainWindow()
16 {
17     delete ui;
18     delete m_pUDPReceiver;
19 }
20 
21 void MainWindow::receive()
22 {
23     QByteArray ba;
24     PlaneInfos oPlaneInfos;
25     while(m_pUDPReceiver->hasPendingDatagrams())
26     {
27         qDebug()<< "receive";
28         ba.resize(m_pUDPReceiver->pendingDatagramSize());
29         m_pUDPReceiver->readDatagram(ba.data(), ba.size());
30         memcpy(&oPlaneInfos, ba.data(), sizeof(PlaneInfos));
31         ui->textEdit->insertPlainText("Number" + QString::number(oPlaneInfos.planeNumber));
32         ui->textEdit->append("");
33         ui->textEdit->append("longitude" + QString::number(oPlaneInfos.info[0].longitude));
34         ui->textEdit->append("latitude" + QString::number(oPlaneInfos.info[0].latitude));
35         ui->textEdit->append("type" + QString::number(oPlaneInfos.info[0].weapons[0].type));
36         ui->textEdit->append("quantity" + QString::number(oPlaneInfos.info[0].weapons[0].quantity));
37 
38         ui->textEdit->append("longitude" + QString::number(oPlaneInfos.info[1].longitude));
39         ui->textEdit->append("latitude" + QString::number(oPlaneInfos.info[1].latitude));
40         ui->textEdit->append("type" + QString::number(oPlaneInfos.info[1].weapons[0].type));
41         ui->textEdit->append("quantity" + QString::number(oPlaneInfos.info[1].weapons[0].quantity));
42         ui->textEdit->append("");
43     }
44 }