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socket

服务器代码

------------h-------#ifndef SERVERWIDGET_H#define SERVERWIDGET_H#include 
   
    #include 
    
     //监听套接字#include 
     
      //通信套接字QT_BEGIN_NAMESPACEnamespace Ui { class ServerWidget; }QT_END_NAMESPACEclass ServerWidget : public QWidget{    Q_OBJECTpublic:    ServerWidget(QWidget *parent = nullptr);    ~ServerWidget();private slots:    void on_buttonSend_clicked();    void on_buttonClose_clicked();private:    Ui::ServerWidget *ui;    QTcpServer *tcpServer;    QTcpSocket *tcpSocket;};#endif // SERVERWIDGET_H------------cpp-----#include "serverwidget.h"#include "ui_serverwidget.h"ServerWidget::ServerWidget(QWidget *parent)    : QWidget(parent)    , ui(new Ui::ServerWidget){    ui->setupUi(this);    //初始化    tcpServer = NULL;    tcpSocket = NULL;    //监听套接字 ,指定父对象，自动回收空间    tcpServer = new QTcpServer(this);    //bool listen(const QHostAddress &address = QHostAddress::Any, quint16 port = 0);    tcpServer->listen(QHostAddress::Any,8888);//bind 和 监听 合在一起了    setWindowTitle("Server");    connect(tcpServer,&QTcpServer::newConnection,            [&](){                    //取出通信套接字,不需要动态分配                    //QTcpSocket *nextPendingConnection();                    tcpSocket = tcpServer->nextPendingConnection();                    //显示连接的信息在窗口上，获取对方ip和端口                    QString ip = tcpSocket->peerAddress().toString();                    qint16 port = tcpSocket->peerPort();                    //组包                    QString temp = QString("[%1:%2]:成功连接").arg(ip).arg(port);                    ui->textEditRead->setText(temp);                    //接受从客户端的消息，自动触发readyRead()                    connect(tcpSocket,&QTcpSocket::readyRead,                            [&](){                                    //从通信套接字中取出内容                                    QByteArray array = tcpSocket->readAll();                                    ui->textEditRead->append(array);                    });                  });//    //接受从客户端的消息，自动触发readyRead()//    connect(tcpSocket,&QTcpSocket::readyRead,//            [&](){//                    //从通信套接字中取出内容//                    QByteArray array = tcpSocket->readAll();////                    ui->textEditRead->append(array);//    });}ServerWidget::~ServerWidget(){    delete ui;}void ServerWidget::on_buttonSend_clicked(){    //获取编辑区的内容    QString str = ui->textEditWrite->toPlainText();    //给对方发送数据，使用套接字是通信套接字    if (tcpSocket != NULL)        tcpSocket->write(str.toUtf8().data());}void ServerWidget::on_buttonClose_clicked(){    //主动和客户端断开连接    if (tcpSocket != NULL){        tcpSocket->disconnectFromHost();        tcpSocket->close();    }}
     
    
   

客户端代码

------------------------------------h#ifndef CLIENTWIDGET_H#define CLIENTWIDGET_H#include 
   
    #include 
    
      //通信套接字//#include 
     
      namespace Ui {class ClientWidget;}class ClientWidget : public QWidget{    Q_OBJECTpublic:    explicit ClientWidget(QWidget *parent = nullptr);    ~ClientWidget();private slots:    void on_buttonConnect_clicked();    void on_buttonSend_clicked();    void on_buttonClose_clicked();private:    Ui::ClientWidget *ui;    QTcpSocket *tcpsocket;};#endif // CLIENTWIDGET_H----------------------------------cpp-----------#include "clientwidget.h"#include "ui_clientwidget.h"#include 
      
         //QHostAddress(ip) 没有头文件按 会报错ClientWidget::ClientWidget(QWidget *parent) :    QWidget(parent),    ui(new Ui::ClientWidget){    ui->setupUi(this);    tcpsocket = NULL;    tcpsocket = new QTcpSocket(this);    //virtual void connectToHost(const QHostAddress &address, quint16 port, OpenMode mode = ReadWrite);    //tcpsocket->connectToHost(,8888);    connect(tcpsocket,&QTcpSocket::connected,            [=](){                ui->textEditRead->setText("successs to connect server");            });    connect(tcpsocket,&QTcpSocket::readyRead,            [=](){                     //从通信套接字中取出内容                     QByteArray array = tcpsocket->readAll();                     ui->textEditRead->append(array);            });}ClientWidget::~ClientWidget(){    delete ui;}void ClientWidget::on_buttonConnect_clicked(){    //获取服务器端口和IP    qint16 port = ui->lineEditIP->text().toInt();    QString ip = ui->lineEditPort->text();    //主动连接服务器    tcpsocket->connectToHost(QHostAddress(ip), port);}void ClientWidget::on_buttonSend_clicked(){    //获取编辑区的内容    QString str = ui->textEditWrite->toPlainText();    //给对方发送数据，使用套接字是通信套接字    if (tcpsocket != NULL)        tcpsocket->write(str.toUtf8().data());}void ClientWidget::on_buttonClose_clicked(){    //主动断开连接    if (tcpsocket != NULL){            tcpsocket->disconnectFromHost();            tcpsocket->close();        }}
      
     
    
   

主函数代码

#include "serverwidget.h"#include "clientwidget.h"#include 
   
    int main(int argc, char *argv[]){    QApplication a(argc, argv);    ServerWidget w;    ClientWidget c;    c.show();    w.show();    return a.exec();}
   

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