基于qt平台，实现tcp的通信实验

#include "serverwidget.h" #include "ui_serverwidget.h" ServerWidget::ServerWidget(QWidget *parent) : QWidget(parent), ui(new Ui::ServerWidget) { ui->setupUi(this); tcpServer = NULL; tcpSocket = NULL; //监听套接字，指定父对象，让其自动回收空间 tcpServer = new QTcpServer(this); tcpServer->listen(QHostAddress::Any, 8888); setWindowTitle("服务器: 8888"); connect(tcpServer, &QTcpServer::newConnection, [=]() { //取出建立好连接的套接字 tcpSocket = tcpServer->nextPendingConnection(); //获取对方的IP和端口 QString ip = tcpSocket->peerAddress().toString(); qint16 port = tcpSocket->peerPort(); QString temp = QString("[%1:%2]:成功连接").arg(ip).arg(port); ui->textEditRead->setText(temp); connect(tcpSocket, &QTcpSocket::readyRead, [=]() { //从通信套接字中取出内容 QByteArray array = tcpSocket->readAll(); ui->textEditRead->append(array); } ); } ); } ServerWidget::~ServerWidget() { delete ui; } void ServerWidget::on_buttonSend_clicked() { if(NULL == tcpSocket) { return; } //获取编辑区内容 QString str = ui->textEditWrite->toPlainText(); //给对方发送数据， 使用套接字是tcpSocket tcpSocket->write( str.toUtf8().data() ); } void ServerWidget::on_buttonClose_clicked() { if(NULL == tcpSocket) { return; } //主动和客户端端口连接 tcpSocket->disconnectFromHost(); tcpSocket->close(); tcpSocket = NULL; }