Qt之QTcpServer/QTcpSocket简单收发信息

用QT包装好的东西做socket类东西，我只能说啥这么简单呢。

waitForConnected() 等待链接的建立

waitForReadyRead() 等待新数据的到来

waitForBytesWritten() 等待数据写入socket

waitForDisconnected() 等待链接断开

开始前在项目.pro里面添加如下：

QT += core gui network

=========server==============

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#include "testnet.h"

#include "ui_testnet.h"

#include <QtGui>

Testnet::Testnet(QWidget *parent) :

QMainWindow(parent),

ui(new Ui::Testnet)

{

ui->setupUi(this);

this->connect(ui->pushButton_start,SIGNAL(clicked()),this,SLOT(startTcpserver()));

this->connect(ui->pushButton_send,SIGNAL(clicked()),this,SLOT(sendMessage()));

}

Testnet::~Testnet()

{

delete ui;

}

void Testnet::startTcpserver()

{

m_tcpServer = new QTcpServer(this);

m_tcpServer->listen(QHostAddress::Any,19999); //监听任何连上19999端口的ip

connect(m_tcpServer,SIGNAL(newConnection()),this,SLOT(newConnect())); //新连接信号触发，调用newConnect()槽函数，这个跟信号函数一样，其实你可以随便取。

}

void Testnet::newConnect()

{

m_tcpSocket = m_tcpServer->nextPendingConnection(); //得到每个连进来的socket

connect(m_tcpSocket,SIGNAL(readyRead()),this,SLOT(readMessage())); //有可读的信息，触发读函数槽

}

void Testnet::readMessage() //读取信息

{

// ui->textEdit_rec->te

QByteArray qba= m_tcpSocket->readAll(); //读取

qDebug()<<qba;

QString ss=QVariant(qba).toString();

ui->textEdit_rec->setText(ss);

}

void Testnet::sendMessage() //发送信息

{

QString strMesg= ui->lineEdit_sendmessage->text();

qDebug()<<strMesg;

m_tcpSocket->write(strMesg.toStdString().c_str(),strlen(strMesg.toStdString().c_str())); //发送

}

=======client========

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#include "testnet_c.h"

#include "ui_testnet_c.h"

testnet_c::testnet_c(QWidget *parent) :

QMainWindow(parent),

ui(new Ui::testnet_c)

{

ui->setupUi(this);

this->connect(ui->pushButton_con,SIGNAL(clicked()),this,SLOT(connectServer()));

this->connect(ui->pushButton_send,SIGNAL(clicked()),this,SLOT(sendMesg()));

}

testnet_c::~testnet_c()

{

delete ui;

}

void testnet_c::connectServer()

{

m_tcpSocket = new QTcpSocket(this);

m_tcpSocket->abort();

m_tcpSocket->connectToHost("192.168.1.178",19999);

connect(m_tcpSocket,SIGNAL(readyRead()),this,SLOT(readMesg()));

}

void testnet_c::readMesg() //读取信息

{

QByteArray qba = m_tcpSocket->readAll();

ui->textEdit_recmesg->clear();

qDebug()<<qba;

QString ss=QVariant(qba).toString();

ui->textEdit_recmesg->setText(ss);

}

void testnet_c::sendMesg() //发送信息

{

QString ss= ui->lineEdit_sendmesg->text();

m_tcpSocket->write(ss.toStdString().c_str(),strlen(ss.toStdString().c_str()));

ui->lineEdit_sendmesg->clear();

}

实验结果如下：