First of all you don't need a separate thread for QNetworkAccessManager as it internally runs in a separate thread (asynchronous) since Qt 4.8.1.
Secondly you are only connecting the last instance of QNetworkAccessManager with a finished slot, instead of doing that, connect each instance of QNetworkAccessManager with handleMultiRequest Slot and keep increasing the count whenever the slot is invoked. You don't need sleep and all that stuff, it is all event driven. So,
void GetNetwork::handleMultiRequest(QNetworkReply * reply)
{
int index=getUrls->indexOf(reply->url().toString());
if(reply->error()!=QNetworkReply::NoError||index==-1)
{
QString error=QString("Network Error file:%1 line:%2 error:%3")
.arg(__FILE__)
.arg(__LINE__)
.arg(reply->errorString());
emit errorOccured(error);
return;
}
count++;
if(count == num_get_requests)
{
emit
allDone()
}
}