我正在为我的应用程序使用 Axis Communications 的两个 ip 摄像机。我想检查相机是否曾经断开连接。QNetworkAccessManager
是否可以通过使用and来做到这一点QNetworkReply
?
我尝试的原型如下:
QNetworkAccessManager *m_networkAccessManager = new QNetworkAccessManager();
QNetworkReply *m_networkReply = m_networkAccessManager->get(QNetworkRequest(camUrl));
if (!m_networkReply)
{
delete m_networkAccessManager;
qDebug()<<"Camera not found"<<endl;
}
connect(m_networkReplyCam, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(cameraDisconnected(QNetworkReply::NetworkError)));
void MainWindow::cameraDisconnected(QNetworkReply::NetworkError)
{
qDebug()<<"Camera Disconected"<<endl;
}
但是该插槽cameraDisconnected
似乎从未被调用。我还尝试连接finished()
来自QNetworkReply
以下的信号:
connect(m_networkReplyCam, SIGNAL(finished()), this, SLOT(cameraDisconnected()));
但即便如此,插槽也永远不会被调用。
我究竟做错了什么?
谢谢。