QT总结之TCP连接

服务器界面

serverwidget.h

#ifndef WIDGET_H#define WIDGET_H#include <QWidget>#include <QTcpServer>//监听套接字#include <QTcpSocket>//通信套接字namespace Ui {class Widget;}class Widget : public QWidget{    Q_OBJECTpublic:    explicit Widget(QWidget *parent = 0);    ~Widget();private slots:    void on_pushButton_clicked();    void on_Close_clicked();private:    Ui::Widget *ui;    QTcpServer *tcpServer;    QTcpSocket *tcpSocket;};#endif // WIDGET_H

serverwidget.cpp

#include "widget.h"#include "ui_widget.h"Widget::Widget(QWidget *parent) :    QWidget(parent),    ui(new Ui::Widget){    ui->setupUi(this);    tcpServer = NULL;    tcpSocket = NULL;    //监听    tcpServer = new QTcpServer(this);    tcpServer->listen(QHostAddress::Any, 8888);    setWindowTitle("title");    connect(tcpServer, &QTcpServer::newConnection,            [=]()            {                //取出建立好的连接的套接字                tcpSocket = tcpServer->nextPendingConnection();                //获取对方ip 和 窗口                QString ip=tcpSocket->peerAddress().toString();                qint16 port=tcpSocket->peerPort();                QString temp = QString("[%1:%2]:成功连接").arg(ip).arg(port);                ui->read->setText(temp);//读取数据                connect(tcpSocket, &QTcpSocket::readyRead,                        [=](){                            QByteArray array = tcpSocket->readAll();                            ui->read->append(array);                         }                        );            }            );}Widget::~Widget(){    delete ui;}void Widget::on_pushButton_clicked(){    if(tcpSocket == NULL){        return;    }    //获取编辑区内同    QString str = ui->write->toPlainText();  //发送数据    tcpSocket->write( str.toUtf8().data());}void Widget::on_Close_clicked(){    if(tcpSocket == NULL){        return;    }    tcpSocket->disconnectFromHost();    tcpSocket->close();    tcpSocket = NULL;}

客户端：

clientwidget.h:

#ifndef CLIENTWIDGET_H#define CLIENTWIDGET_H#include <QWidget>#include <QTcpSocket>namespace Ui {class ClientWidget;}class ClientWidget : public QWidget{    Q_OBJECTpublic:    explicit ClientWidget(QWidget *parent = 0);    ~ClientWidget();private slots:    void on_connect_clicked();    void on_send_clicked();    void on_close_clicked();private:    Ui::ClientWidget *ui;    QTcpSocket *tcpSocket;};#endif // CLIENTWIDGET_H

clientwidget.cpp

#include "clientwidget.h"#include "ui_clientwidget.h"#include <QHostAddress>ClientWidget::ClientWidget(QWidget *parent) :    QWidget(parent),    ui(new Ui::ClientWidget){    ui->setupUi(this);    tcpSocket = NULL;    tcpSocket = new QTcpSocket(this);    connect(tcpSocket, &QTcpSocket::connected,            [=](){                ui->read->setText("success!");    }            );    connect(tcpSocket, &QTcpSocket::readyRead,            [=](){            //获取对方发送的内容        QByteArray array = tcpSocket->readAll();        ui->read->append(array);    }            );}ClientWidget::~ClientWidget(){    delete ui;}void ClientWidget::on_connect_clicked(){    QString ip = ui->ip->text();    qint16 port = ui->port->text().toInt();    tcpSocket->connectToHost(QHostAddress(ip),port);}void ClientWidget::on_send_clicked(){    QString str = ui->write->toPlainText();  //发送数据    tcpSocket->write(str.toUtf8().data());}void ClientWidget::on_close_clicked(){    tcpSocket->disconnectFromHost();    tcpSocket->close();}

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