Qt qudp套接字读取问题
从UDP客户端接收数据时出现问题。我使用的代码是:Qt qudp套接字读取问题,qt,qudpsocket,Qt,Qudpsocket,从UDP客户端接收数据时出现问题。我使用的代码是: MyUDP::MyUDP(QObject *parent) : QObject(parent) { socket = new QUdpSocket(this); socket->bind(QHostAddress("192.168.1.10"),2000); connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead())); qDebu
MyUDP::MyUDP(QObject *parent) :
QObject(parent)
{
socket = new QUdpSocket(this);
socket->bind(QHostAddress("192.168.1.10"),2000);
connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));
qDebug() << "Socket establert";
}
void MyUDP::HelloUDP()
{
QByteArray Data;
Data.append("R");
socket->writeDatagram(Data, QHostAddress("192.168.1.110"), 5001);
qDebug() << "Enviat datagrama";
}
void MyUDP::readyRead()
{
QByteArray buffer;
buffer.resize(socket->pendingDatagramSize());
QHostAddress sender;
quint16 senderPort;
socket->readDatagram(buffer.data(), buffer.size(), &sender, &senderPort);
qDebug() << "Message from: " << sender.toString();
qDebug() << "Message port: " << senderPort;
qDebug() << "Message: " << buffer;
qDebug() << "Size: " << buffer.size();
qDebug() << "Pending datagrams: " << socket->hasPendingDatagrams();
QString str(buffer);
QString res = str.toAscii().toHex(); qDebug() << res;
}
但在我的应用程序的控制台输出中,我接收到以下集群数据:
Message from: "192.168.1.110"
Message port: 5001
Message: "X¿
Size: 20
Pending datagrams: false
"58bf80"
您可以看到,只接收到数据“58bf80”的第一部分。数据报似乎没有任何限制,套接字运行良好。我不知道会发生什么
提前感谢。截断可能发生在从
QByteArray
到QString
的转换过程中,字符串在空终止符(值为0的字节)中被截断
要正确地从QByteArray
转换为十六进制编码的QString
使用toHex
函数,如以下示例所示:
QByteArray data; //The data you got!
QString str = QString(data.toHex()); //Perform the conversion to hex encoded and to string
QByteArray data; //The data you got!
QString str = QString(data.toHex()); //Perform the conversion to hex encoded and to string