TCPIP 数组传输 | 易学教程

最近一直在弄TCPIP进行数据传输，刚刚入门，网上搜了很多例子，今天终于完成了一个小demo

客户端发数组：主要就是数据类型的转化从float 转化成QByteArray

//1.建立客户端连接套接字connected 2.建立连接客户端不断监听服务器的信息readyread

//3.读取服务器信息readAll 4.设置连接按钮tcpsocket->connectToHost;

//5.设置发送信息的按钮write()

//6.关闭套接字disconnectFromHost()和close()

#include "widget.h"

#include "ui_widget.h"

#include <QHostAddress>

Widget::Widget(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::Widget)

    ui->setupUi(this);

    tcpsocket = new QTcpSocket(this);

    connect(tcpsocket,&QTcpSocket::connected,

            [=]()

        QString str = "successfully connect!";

     ui->textBrowser->append(str);

});

    connect(tcpsocket,&QTcpSocket::readyRead,

            [=]()

       QByteArray array = tcpsocket->readAll();

       QByteArray arrayServer;

       arrayServer.append(array);

       double dataServer[10];

       memcpy(&dataServer,arrayServer.data(),sizeof(dataServer));

       for(int i = 0;i<10;i++)

       ui->textBrowser->append(QString::number(dataServer[i]));

});

Widget::~Widget()

    delete ui;

void Widget::on_connectBtn_clicked()

    QString addr = ui->addrLed->text();

    qint16 port = ui->portLed->text().toInt();

    tcpsocket->connectToHost(QHostAddress(addr),port);

void Widget::on_closeBtn_clicked()

    tcpsocket->disconnectFromHost();

    tcpsocket->close();

void Widget::on_sendBtn_clicked()

{//QString  str1 = "hello world!";

    float data[20] = {1.1f,1.2f,1.3f,1.4f,1.5f,1.6f,1.7f,1.8f,1.9f,2.0f,2.1f,2.2f,2.3f,2.4f,2.5f,2.6f,2.7f,2.8f,2.9f,3.0f};

    QByteArray array1;

  array1.append((char*)&data,sizeof(data));

   // QByteArray array = str1.toLocal8Bit();

  qDebug()<<array1;

    tcpsocket->write(array1);

}服务器接受：//服务器的步骤和函数

//1.建立套接字 2.监听listen(QHostAddress,888) 3.建立连接newConnection

//4.netPendingconnection,peerAdress,peerPort 5.建立连接不断监听readyread

//6.QByteArray array = tcpsocket->readAll();

#include "widget.h"

#include "ui_widget.h"

Widget::Widget(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::Widget)

    ui->setupUi(this);

    tcpserver = new QTcpServer(this);

    //监听，建立连接套接字

    tcpserver->listen(QHostAddress::Any,8888);

    connect(tcpserver,&QTcpServer::newConnection,//设置新连接

            [=]()

        tcpsocket = tcpserver->nextPendingConnection();

        QString ip = tcpsocket->peerAddress().toString();

        qint16 port = tcpsocket->peerPort();

        QString  temp = QString("[%1:%2]sucessfully connect!").arg(ip).arg(port);

        ui->textBrowser->setText(temp);

        connect(tcpsocket,&QTcpSocket::readyRead,

                [=]()

        {//解析浮点数据

            QByteArray array = tcpsocket->readAll();//QByteArray转浮点数据

            QByteArray arraybuffer;

            arraybuffer.append(array);

            float data[20];

            memcpy(&data,arraybuffer.data(),sizeof(data));

           // ui->textBrowser->append(data[10]);

            for(int i = 0;i<20;i++)

           { qDebug()<<data[i];

            ui->textBrowser->append(QString::number(data[i]));}

            //写入客户端数据

            double dataServer[10] = {11.1,11.2,11.3,11.4,11.5,11.6,11.7,11.8,11.9,12.0};

            QByteArray arrayServer;

            arrayServer.append((char*)&dataServer,sizeof(dataServer));

            tcpsocket->write(arrayServer);

            qDebug()<<"server:"<<arrayServer;

});

);

Widget::~Widget()

    delete ui;

无论怎么样，今天终于实现了，开心，同时也希望各路大佬多多指教

来源：https://www.cnblogs.com/xiaotaozi123/p/11844799.html

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