QT socket通訊客戶端與服務端例項
阿新 • • 發佈：2020-11-21
qt通訊很簡單,主要是利用socket通訊,網上有很多案例,案例稍有漏洞,我自己稍加改善,如下
QT += network
client.h
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QTcpSocket>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = nullptr);
~Widget();
private slots:
void on_pushButton_3_clicked();
void on_pushButton_clicked();
void on_pushButton_2_clicked();
void connectToServer();
void readInformation();
private:
Ui::Widget *ui;
QTcpSocket *tcpsocket= NULL;
};
#endif // WIDGET_H client.cpp
#include "widget.h"
#include "ui_widget.h"
#include <QHostAddress>
Widget::Widget(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Widget)
{
ui->setupUi(this);
}
Widget::~Widget()
{
delete ui;
}
//寫socket
void Widget::on_pushButton_clicked()
{
QString str = ui->textEditWrite->toPlainText();
tcpsocket->write(str.toUtf8().data());
}
//主動斷開連結
void Widget::on_pushButton_2_clicked()
{
if(tcpsocket == NULL)return;
tcpsocket->disconnectFromHost();//主動和客戶端斷開連線
tcpsocket->close();
tcpsocket = NULL;
//if(tcpsocket == NULL) ui->textEditRead->append("已斷開連結");
}
//已經連線到伺服器
void Widget::connectToServer()
{
ui->textEditRead->setText("成功和伺服器進行連線");
}
//從通道讀取資料
void Widget::readInformation()
{
QByteArray temp = tcpsocket->readAll();
ui->textEditRead->append(temp);
}
//建立連結
void Widget::on_pushButton_3_clicked()
{
QString ip = ui->lineEditIpAddress->text();
qint16 port = ui->lineEditPort->text().toInt();
if(tcpsocket != NULL){tcpsocket->deleteLater();tcpsocket=NULL;}
tcpsocket = new QTcpSocket();
connect(tcpsocket, &QTcpSocket::connected, this, &Widget::connectToServer);
connect(tcpsocket, &QTcpSocket::readyRead, this, &Widget::readInformation);
connect(tcpsocket, &QTcpSocket::disconnected, this, [this](){
ui->textEditRead->append("已斷開連結");
});
//主動和伺服器進行連線
tcpsocket->connectToHost((QHostAddress)ip, port);
}
server.h
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QTcpServer>
#include <QTcpSocket>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = nullptr);
~Widget();
private slots:
void on_pushButton_clicked();
void on_pushButton_2_clicked();
void connectToClient();
void readInformation();
void on_pushButton_3_clicked();
private:
Ui::Widget *ui;
QTcpServer *tcpserver = NULL ;
QTcpSocket *tcpsocket = NULL;
};
#endif // WIDGET_H
server.cpp
#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Widget)
{
ui->setupUi(this);
}
Widget::~Widget()
{
delete ui;
}
//建立連結
void Widget::connectToClient()
{
if(tcpsocket != NULL){tcpsocket->deleteLater();tcpsocket=NULL;}
tcpsocket = tcpserver->nextPendingConnection();
connect(tcpsocket, &QTcpSocket::readyRead, this, &Widget::readInformation);
connect(tcpsocket, &QTcpSocket::disconnected, this, [this](){
ui->textEditRead->append("已斷開連結");
});
QString ip = tcpsocket->peerAddress().toString();
qint16 port = tcpsocket->peerPort();
ui->textEditRead->setText(QString("[%1:%2]連線成功").arg(ip).arg(port));
}
//從通道讀取資料
void Widget::readInformation()
{
QByteArray temp = tcpsocket->readAll();
ui->textEditRead->append(temp);
}
//向通道寫資料
void Widget::on_pushButton_clicked()
{
QString str = ui->textEditWrite->toPlainText();
tcpsocket->write(str.toUtf8().data());
}
//客戶端主動斷開連結
void Widget::on_pushButton_2_clicked()
{
if(tcpsocket == NULL)return;
tcpsocket->disconnectFromHost();//主動和客戶端斷開連線
tcpsocket->close();
tcpsocket->deleteLater();
tcpsocket = NULL;
//if(tcpsocket == NULL) ui->textEditRead->append("已斷開連結");
}
//建立監聽
void Widget::on_pushButton_3_clicked()
{
if(tcpserver!=NULL){on_pushButton_2_clicked();tcpserver->deleteLater();tcpserver = NULL;}
//if(tcpserver!=NULL){tcpserver->deleteLater();tcpserver = NULL;}
//if(tcpserver!=NULL){tcpserver = NULL;}
tcpserver = new QTcpServer(this);
int port = ui->lineEditListenPort->text().toInt();
tcpserver->listen(QHostAddress::Any, port);
connect(tcpserver, &QTcpServer::newConnection, this, &Widget::connectToClient);
}