UDP Socket do not need to run in forever loop(solved)

houmingc

Below is my udp code.
Do i need to use a thread to read processPendingDatagram() continuously or
socket constructor will always receive Signal whenever and run processPendingDatagrams()
thus forever loop not needed.

@
void socketudp::processPendingDatagrams()
{

    while(udpSocket->hasPendingDatagrams();
    {  QByteArray datagram;
       datagram.resize(updSocket->pendingDatagramSize());
       udpSocket->readDatagram(datagram.data(),   datagram.size());
       qDebug<<"UDP received";

  }

}

socketudp::socketudp()
{
udpSocket=new QudpSocket(this);
udpSocket->bind(10010, QUdpSocket::ShareAddress);
connect(udpsocket, SIGNAL(readyRead()), this, SLOT(processPendingDatagrams()));
}
@

[edit: added missing coding tags @ SGaist]

leonardo.ramosantos

Hi.

First of all, why are you using the last connect? That line doesn't do anything.

Second, you can use a thread and connect a slot in the udpsocket's signal called "readyRead". Everytime udpsocket is receiving data, it calls this signal, so you can read the data incoming.

Here is a link to a solution like the one i told you about: "link":http://stackoverflow.com/questions/21224894/qt-qudpsocket-readyread-signal-and-corresponding-slot-not-working-as-supposed

I hope i have helped you.

houmingc

I found the site below and follow what they are doing.
http://doc.qt.digia.com/4.6/network-broadcastsender.html

I found my problem is because i created the socketUDP class object inside
Mainwindow constructor, application cannot received.
When i put the object creation outside mainwindow (in main.cpp), data is received successfully. Thanks