本文实例为大家分享了QT网络通信TCP客户端实现的具体代码，供大家参考，具体内容如下
QT中基于TCP套接字的网络通信需要用到两个类
- QTcpServer:服务器类，用于监听客户端连接和客户端建立连接
- QTcpSocket:通信套接字类，客户端和服务端都需要使用*
这两个类都属于网络通信的network
需要在工程路径下添加network
QT += core gui network
服务器
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->port->setText("8899");
ui->ip->setText("127.0.0.1");
setWindowTitle("客户端");
m_tcp = new QTcpSocket(this);
connect(m_tcp,&QTcpSocket::readyRead,this,[=](){
QByteArray data = m_tcp->readAll();
ui->record->append("服务端："+data);
});
connect(m_tcp,&QTcpSocket::disconnected,this,[=]()
{
ui->connect->setEnabled(true);
ui->disconnect->setDisabled(true);
m_tcp->close();
// m_tcp->deleteLater();//状态释放
m_status->setPixmap(QPixmap(":/red.png").scaled(20,20));
ui->record->append("断开连接");
});
connect(m_tcp,&QTcpSocket::connected,this,[=](){
m_status->setPixmap(QPixmap(":/green.png").scaled(20,20));
ui->connect->setDisabled(true);
ui->disconnect->setEnabled(true);
ui->record->append("连接成功");
});
//
ui->disconnect->setDisabled(true);
m_status = new QLabel;
m_status->setPixmap(QPixmap(":/red.png").scaled(20,20));
ui->statusBar->addWidget(new QLabel("连接状态："));
ui->statusBar->addWidget(m_status);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_sendMsg_clicked()
{
QString msg = ui->message->toPlainText();
m_tcp->write(msg.toUtf8());
ui->record->append("客户端："+msg);
}
void MainWindow::on_connect_clicked()
{
QString ip=ui->ip->text();
unsigned short port=ui->port->text().toUShort();
m_tcp->connectToHost(QHostAddress(ip),port);
ui->connect->setEnabled(false);
ui->disconnect->setDisabled(false);
}
void MainWindow::on_disconnect_clicked()
{
m_tcp->close();
ui->connect->setEnabled(true);
ui->disconnect->setDisabled(true);
}
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QTcpSocket>
#include <Qlabel>
#include <QHostAddress>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = nullptr);
~MainWindow();
private slots:
void on_sendMsg_clicked();
void on_connect_clicked();
void on_disconnect_clicked();
private:
Ui::MainWindow *ui;
QTcpSocket *m_tcp;
QLabel *m_status;
};
#endif // MAINWINDOW_H
ui文件
<?xml version="1.0" encoding="UTF-8"?> <ui version="4.0"> <class>MainWindow</class> <widget class="QMainWindow" name="MainWindow"> <property name="geometry"> <rect> <x>0</x> <y>0</y> <width>428</width> <height>606</height> </rect> </property> <property name="windowTitle"> <string>MainWindow</string> </property> <widget class="QWidget" name="centralWidget"> <layout class="QVBoxLayout" name="verticalLayout"> <item> <widget class="QWidget" name="widget" native="true"> <layout class="QGridLayout" name="gridLayout"> <item row="1" column="0"> <widget class="QLabel" name="label_3"> <property name="text"> <string>IP：</string> </property> </widget> </item> <item row="0" column="0"> <widget class="QLabel" name="label"> <property name="text"> <string>端口：</string> </property> </widget> </item> <item row="1" column="1"> <widget class="QLineEdit" name="ip"/> </item> <item row="1" column="2"> <widget class="QPushButton" name="disconnect"> <property name="text"> <string>断开连接</string> </property> </widget> </item> <item row="0" column="1"> <widget class="QLineEdit" name="port"/> </item> <item row="0" column="2"> <widget class="QPushButton" name="connect"> <property name="text"> <string>连接服务器</string> </property> </widget> </item> </layout> </widget> </item> <item> <widget class="QGroupBox" name="groupBox"> <property name="title"> <string>历史信息</string> </property> <layout class="QHBoxLayout" name="horizontalLayout_2"> <item> <widget class="QTextEdit" name="record"/> </item> </layout> </widget> </item> <item> <widget class="QGroupBox" name="groupBox_2"> <property name="title"> <string>发送信息</string> </property> <layout class="QHBoxLayout" name="horizontalLayout_3"> <item> <widget class="QTextEdit" name="message"/> </item> </layout> </widget> </item> <item> <widget class="QWidget" name="widget_2" native="true"> <layout class="QHBoxLayout" name="horizontalLayout_4"> <item> <spacer name="horizontalSpacer_2"> <property name="orientation"> <enum>Qt::Horizontal</enum> </property> <property name="sizeHint" stdset="0"> <size> <width>136</width> <height>20</height> </size> </property> </spacer> </item> <item> <widget class="QPushButton" name="sendMsg"> <property name="text"> <string>发送信息</string> </property> </widget> </item> <item> <spacer name="horizontalSpacer"> <property name="orientation"> <enum>Qt::Horizontal</enum> </property> <property name="sizeHint" stdset="0"> <size> <width>135</width> <height>20</height> </size> </property> </spacer> </item> </layout> </widget> </item> </layout> </widget> <widget class="QMenuBar" name="menuBar"> <property name="geometry"> <rect> <x>0</x> <y>0</y> <width>428</width> <height>23</height> </rect> </property> </widget> <widget class="QToolBar" name="mainToolBar"> <attribute name="toolBarArea"> <enum>TopToolBarArea</enum> </attribute> <attribute name="toolBarBreak"> <bool>false</bool> </attribute> </widget> <widget class="QStatusBar" name="statusBar"/> </widget> <layoutdefault spacing="6" margin="11"/> <resources/> <connections/> </ui>
ui界面
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