c++ - QNetworkAccessManager 不发出信号

Question

所以我有这段代码:

QUrl url("http://...");
QNetworkRequest request(url);
QNetworkReply *reply = m_networkManager->get(request);
connect(reply, SIGNAL(finished()), SLOT(onRequestCompleted()));
connect(reply,SIGNAL(error(QNetworkReply::NetworkError)),SLOT(onError(QNetworkReply::NetworkError)));

我不能得到其他功能的信号

void IpResolver::onRequestCompleted()
{
QString webContent;

QNetworkReply *reply = qobject_cast<QNetworkReply*>(sender());

if (reply)
{
    if (reply->error() == QNetworkReply::NoError)
    {
        QString webContent = reply->readAll();
    }
}
}

我想不出解决办法，请帮忙。

Answer 1

我不知道你到底想要什么，但是:

1. 为什么使用回复指针而不是某种onRequestCompleted(QNetworkReply *reply)？

2. 如果你这样做:

   QUrl url("http://...");
   QNetworkRequest request(url);
   connect(m_networkManager, &QNetworkAccessManager::finished, this, &IpResolver::onRequestCompleted);
   m_networkManager->get(request);
   

3. 例如，您的插槽将是:

   void IpResolver::onRequestCompleted(QNetworkReply *reply)
   {
       QString webContent;
       if (reply->error() == QNetworkReply::NoError)
           webContent = reply->readAll();
   }