[网络协议]Qt进程间通信-UDP

发送端

 1. 创建套接字
	QUdpSocket mSocket;
	mSocket = new QUdpSocket();
2. 发送数据到指定的端口和地址
    mSocket->writeDatagram();

接收端

 1. 创建套接字
 	QUdpSocket mSocket;
	mSocket = new QUdpSocket();
 2. 绑定地址和端口号
	connect(mSocket,SIGNAL(readyRead()),this,SLOT(read_data()));
 3. 等待数据的到来
 	void UdpRecv::read_data()
	{
    QByteArray array;
    QHostAddress address;
    quint16 port;
    array.resize(mSocket->bytesAvailable());//根据可读数据来设置空间大小
    mSocket->readDatagram(array.data(),array.size(),&address,&port); //读取数据
    ui->listWidget->addItem(array);//显示数据
   //发送反馈数据
	}
 4. 读取数据
	readDatagram(char * data, qint64 maxSize, QHostAddress * address = 0, quint16 * port = 0)