feat: Udp通信：multicate(组播)的使用

QtUdpEx/ExMulticast/ExMulticast.h

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C)  2019 ~ 2019 touwoyimuli.  All rights reserved.
+ *
+ * Author:  touwoyimuli <touwoyimuli@gmai.com>
+ *
+ * github:  https://github.com/touwoyimuli
+ * blogs:   https://touwoyimuli.github.io/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://touwoyimuli.github.io/>.
+ */
+#ifndef EXMULTICAST_H
+#define EXMULTICAST_H
+
+#include <QMainWindow>
+#include <QUdpSocket>
+#include <QLabel>
+#include <QHostInfo>
+#include <QHostAddress>
+
+namespace Ui {
+class ExMulticast;
+}
+
+class ExMulticast : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit ExMulticast(QWidget *parent = nullptr);
+    ~ExMulticast();
+
+private slots:
+    void on_actStart_triggered();
+    void on_actStop_triggered();
+    void on_actClear_triggered();
+    void on_actQuit_triggered();
+
+    void onSocketStateChange(QAbstractSocket::SocketState socketState);  //socket 状态发生变化
+    void onSocketReadyRead();        //读取 socket 传入的数据
+    void on_btnSend_clicked();
+
+private:
+    QString getLocalIp();            //获取本机IP
+
+private:
+    Ui::ExMulticast *ui;
+
+    QUdpSocket* m_udpSocket;      //用于通讯的 socket
+    QLabel* m_labSocketState;
+    QHostAddress m_groupAddress;  //组播地址
+};
+
+#endif // EXMULTICAST_H