QTcpServer :: hadPendingConnections（）在新连接时返回false

Question

我正在处理一些服务器应用程序，该骨架是子类QTcpServer，名为UeTcpServer。服务器应用程序正常启动，当我在ueSlotTcpServerNewConnection()中放置断点时，该断点连接到UeTcpServer＆＃39; s newConnectionSignal来自

connect(this->ueTcpServer(),
        SIGNAL(newConnection()),
        this,
        SLOT(ueSlotTcpServerNewConnection()));

然后使用Linux terminal连接到服务器应用，断点在ueSlotTcpServerNewConnection()插槽内激活：

void UeMainWindow::ueSlotTcpServerNewConnection()
{
    if(this->ueTcpServer()->hasPendingConnections())
    {
        QTcpSocket* incomingSocket=this->ueTcpServer()->nextPendingConnection();

        this->ueSlotAddEventInfoLog(0,
                                    tr("New incoming connection from host")
                                    .append(" ")
                                    //.append(this->ueTcpServer()->nextPendingConnection()->peerAddress().toString())
                                    .append(incomingSocket->peerName())
                                    .append(" ")
                                    .append(tr("with IP address"))
                                    .append(" ")
                                    .append(incomingSocket->peerAddress().toString())
                                    .append(" ")
                                    .append(tr("using port"))
                                    .append(" ")
                                    //.append(this->ueTcpServer()->nextPendingConnection()->peerPort()));
                                    .append(QString::number(incomingSocket->peerPort())));
    }   // if
}   // ueSlotTcpServerNewConnection

但是，this->ueTcpServer()->hasPendingConnection()会返回false。为什么呢？

Answer 1

我忘了从addPendingConnection(QTcpSocket *socket致电incomingConnection(qintptr socketDescriptor)，正如docs中所述：

void UeTcpServer::incomingConnection(qintptr socketDescriptor)
{  
    QTcpSocket* newSocket=new QTcpSocket(this);

    newSocket->setSocketDescriptor(socketDescriptor);

    this->addPendingConnection(newSocket);
}   // incomingConnection

现在有效。