Qt TcpMultiThread Server

Krizbiii

Hey
I have some problem with my TCP Server.

void MyThread::readyRead(){
    //auto socket = qobject_cast<QTcpSocket *>(sender());

    QByteArray Data = socket->readAll();
    qDebug() << socketDescriptor <<"Data in : "<< Data;
    socket ->write(Data); //Its work
    //Send message for all Client (socket)
    for( int i=0; i < ClientList.count(); ++i ) {
        QTcpSocket* writeforsocket = ClientList.at(i);
        //crash here
        writeforsocket->write("Text");  //DIDINT WORK

        writeforsocket->flush();
        writeforsocket->waitForBytesWritten(3000);
        //writeforsocket->write(CurrentImg); // Write The Encoded Image
        writeforsocket->flush();
    }
}

J.Hilk

hi @Krizbiii and welocme

Most likely your ClientList does not contain a valid pointer to a QTcpSocket instance.

You should check that

VRonin

I see a number of potential things going wrong here. Let's start with the most obvious one, what is ClientList? who owns it?

As a separate but important point. Why are you using multithreading to manage TCP socket? if it's to allow multiple connections it's a misconception born from the fortune client/server example being not very clear.

You can check out this example for an hopefully clearer explanation