基于qt的udp发送文字信息聊天小软件

#include "widget.h" #include "ui_widget.h" #include <qdatetime.h> #include <QTextCodec> Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); configFlag = false; //初始化连接参数 为未连接 ui->getTextEdit->ensureCursorVisible(); ui->sendTextEdit->setFocus(); //程序启动时，焦点停在发送对话框 ui->ipEdit->setText("192.168.2.211"); //设置默认的远程端Ip ui->portEdit->setText("6665"); //设置默认端口号 //关联快捷键 ui->udpSendButton->setShortcut(tr("Alt+F")); // QHostInfo info = QHostInfo::fromName(QHostInfo::localHostName()); // hostaddr1 = info.addresses().takeFirst(); // hostaddr1 = new QHostAddress("192.168.2.214"); //本地的Ip地址 // hostaddrStr = hostaddr1.toString(); // hostaddrStr = QNetworkInterface::allAddresses().first().toString(); localIpStr = getIp(); localHostAddr = new QHostAddress(localIpStr); udpSocket1 = new QUdpSocket(this); bool bindFlag = udpSocket1->bind(*localHostAddr, 6665, QUdpSocket::ShareAddress); if(!bindFlag) { QMessageBox box; box.setText(tr("初始化绑定socket错误！")); box.exec(); } else { connect(udpSocket1, SIGNAL(readyRead()), this, SLOT(receive())); connect(ui->udpSendButton, SIGNAL(clicked()), this, SLOT(send())); } this->setWindowTitle(tr("基于Qt的UDP聊天界面-------南无准提佛母")); } void Widget::send() { autoScroll(); QString sendStr = ui->sendTextEdit->toPlainText(); QByteArray sendByteArray = sendStr.toAscii(); QMessageBox box; if(sendStr.length()==0) { box.setText(tr("请输入发送内容")); box.exec(); } else if(configFlag) { udpSocket1->writeDatagram(sendByteArray, sendByteArray.length(), *remoteHostAddr, 6665); //本地发送信息再信息交互窗口的显示 QDateTime time; QString timeStr = time.currentDateTime().toString("yyyy-MM-dd hh:mm:ss ddd"); ui->getTextEdit->setTextColor(QColor("red")); ui->getTextEdit->insertPlainText("本机" + localIpStr + ": " + timeStr + "\n"); ui->getTextEdit->setTextColor(QColor("black")); ui->getTextEdit->insertPlainText( sendStr +"\n"); ui->sendTextEdit->clear(); //点击发送后，发送编辑框内清零 ui->sendTextEdit->setFocus(); //焦点停留在发送编辑框 } else if(!configFlag) { box.setText("请您先点击确认按钮!"); box.exec(); } } void Widget::receive() { while(udpSocket1->hasPendingDatagrams()) { QTextCodec *tc=QTextCodec::codecForName("UTF-8"); //UTF-8 QDateTime time; QString timeStr = time.currentDateTime().toString("yyyy-MM-dd hh:mm:ss ddd"); QByteArray data; data.resize(udpSocket1->pendingDatagramSize()); udpSocket1->readDatagram(data.data(), data.size()); // QString dataStr = QString::fromUtf8(data.data()); //这样写也是正确的 QString dataStr = tc->toUnicode(data); ui->getTextEdit->setTextColor(QColor("red")); ui->getTextEdit->insertPlainText("远程" + remoteIpStr+": "+ timeStr +"\n" ); ui->getTextEdit->setTextColor(QColor("black")); ui->getTextEdit->insertPlainText(dataStr + "\n" ); autoScroll(); } } QString Widget::getIp() { QList<QHostAddress> list = QNetworkInterface::allAddresses(); foreach (QHostAddress address, list) { if(address.protocol() == QAbstractSocket::IPv4Protocol) //我们使用IPv4地址 { if(address.toString().contains("127.0.")) continue; qDebug()<<"本机Ip："<<address.toString(); return address.toString(); } } return 0; } void Widget::autoScroll() { QTextCursor cursor = ui->getTextEdit->textCursor(); cursor.movePosition(QTextCursor::End); ui->getTextEdit->setTextCursor(cursor); } Widget::~Widget() { delete ui; } void Widget::on_clearButton_clicked() { ui->getTextEdit->clear(); } void Widget::on_configButton_clicked() { remoteIpStr = ui->ipEdit->text(); QString port = ui->portEdit->text(); qDebug()<<"远程端Ip："<<remoteIpStr<<"端口号："<<port; remoteHostAddr = new QHostAddress(remoteIpStr); QMessageBox box; if(remoteIpStr.length()==0 || port.length()==0 || port.toInt()<1024) { configFlag = false; box.setText("请正确设置远程端Ip地址和端口号！"); box.exec(); } else { configFlag = true; box.setText("您设置的远程端Ip：" + remoteIpStr+"端口号："+port); box.exec(); } } void Widget::on_exitButton_clicked() { this->close(); }