QT小程序-TCP服务器端与客户端连接

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QMessageBox> #include <QTcpSocket> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); setWindowTitle(u8"服务器"); //设置Title setWindowIcon(QIcon(":/titleIcon.png")); //设置Title图标 ui->portEdit->setText("10554"); //创建监听的服务器对象,相当于serv_sock tcpsock = new QTcpServer(this); connect(tcpsock,&QTcpServer::newConnection,this,[=](){ //newConnection()相当于listen() ui->connectBtn->setDisabled(true); cln_sock = tcpsock->nextPendingConnection(); //nextPendingConnection()相当于accept() ui->connectBtn->setDisabled(true); ui->historyEdit->setText("连接成功！"); msgBox->close(); connect(cln_sock,&QTcpSocket::readyRead,this,[=](){ //cln_sock发送readyRead信号说明信息到了cln_sock，可以读了 QByteArray read_data = cln_sock->readAll(); //利用readAll()都所有数据 ui->historyEdit->append("客户端： "+read_data); }); staLable->setPixmap(QPixmap(":/right.png").scaled(20,20)); connect(cln_sock,&QTcpSocket::disconnected,this,[=](){ cln_sock->close(); //如果cln_sock收到disconnected消息，就关闭套接字 cln_sock->deleteLater(); //delete cln_sock staLable->setPixmap(QPixmap(":/error.png").scaled(20,20)); ui->connectBtn->setEnabled(true); ui->historyEdit->append("断开连接！"); }); }); //设置状态栏 staLable = new QLabel(this); staLable->setPixmap(QPixmap(":/error.png").scaled(20,20)); //setPixmap()添加图片，scaled()用于设置缩放大小 ui->statusbar->addWidget(new QLabel("连接状态:")); ui->statusbar->addWidget(staLable); } MainWindow::~MainWindow() { delete ui; } //绑定IP、端口 void MainWindow::on_connectBtn_clicked() { unsigned short port = ui->portEdit->text().toUShort(); //text()获取内容为字符串，因为端口类型要是unsigned short，所以在调用toUshort() tcpsock->listen(QHostAddress::Any,port); //相当于bind() msgBox = new QMessageBox(QMessageBox::Warning, "警告", "正在寻找连接...", QMessageBox::NoButton, this); //msgBox->warning(this,"警告","正在寻找连接..."); msgBox->show(); } //将Edit内容发送到套接字，并在对话框中显示 void MainWindow::on_subBtn_clicked() { if(cln_sock->state() == QAbstractSocket::ConnectedState){ QString write_data = ui->subEdit->toPlainText(); //toPlainText()是以纯文本的方式读取Edit内容 cln_sock->write(write_data.toUtf8()); //toUtf8()将内容转换为QByteArray类型 ui->historyEdit->append("服务器： "+write_data); ui->subEdit->setText(""); //内容发送到historyEdit， }else{ QMessageBox::warning(this,"警告","请先连接网络"); } }