QT网络通信TCP客户端实现详解
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
