无法在QTcpSocket上写入数据

Question

I am trying to implement a client/server application using Qt/C++, but whenever I try to write data on QTcpSocket , then the program is getting terminated. I get the following error :

Server started. The program has unexpectedly finished.

/home/pavan/qt/build-server-Desktop-Debug/server crashed.

Here is my code:

void server::on_pushButton_clicked()
{

    Server=new QTcpServer(this);
    if(Server->listen(QHostAddress::Any,ui->lineEdit->text().toInt()))
        qDebug()<<"Server started";
    else
    {
        qDebug()<<"Could not start server";
        return;
    }

    QTcpSocket *socket = Server->nextPendingConnection();

    socket->write("Hii server");
    socket->flush();
    socket->waitForBytesWritten((3000));

    socket->close();
}

Thanks in advance.

Answer 1

Please check the return value of nextPendingConnection. It could return 0 if case no pending connections. It could lead to crash. And you can try to use debugger which help u to identify and trouble shooting a lot.