QT之TCP传输客户端和服务器端互发信息的实现

#include "serverwidget.h" #include "ui_serverwidget.h" #include <QHostAddress> 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(); //追加到编辑区中 ui->textEditRead->append(array); }); }); } ServerWidget::~ServerWidget() { delete ui; } void ServerWidget::on_send_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_close_clicked() { if(NULL==tcpsocket){ return; } //主动和客户端断开连接 tcpsocket->disconnectFromHost(); tcpsocket->close(); tcpsocket=NULL; }