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==============

#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========

#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(); 
}