前提：

? ? ? ?使用QNetworkAccessManager 進行post請求， 如果在請求期間網絡斷開，網絡恢復后，依然會提示請求失敗，返回UnknownNetworkError。

問題解決：

QNetworkAccessManager 有一個函數

networkAccessible : NetworkAccessibility

This property holds whether the network is currently accessible via this network access manager.

If the network is not accessible the network access manager will not process any new network requests, all such requests will fail with an error. Requests with URLs with the file:// scheme will still be processed.

By default the value of this property reflects the physical state of the device. Applications may override it to disable all network requests via this network access manager by calling

e文不好的小伙伴，翻譯一下看看，大體意思請求網絡失敗后，會保存當前的網絡狀態， 導致后面繼續請求也是失敗。

根據文檔

Network requests can be reenabled again by calling

networkAccessManager->setNetworkAccessible(QNetworkAccessManager::Accessible);

要恢復網絡請求調用一setNetworkAccessible即可。

只需要在QNetworkAccessManager執行get或者post的時候，獲取一下NetworkAccessible的狀態， 再設置一下就好了

void QPayHeartBeat::post() {if(m_NetManager){;QNetworkRequest request = setRequest();QByteArray data = setReplyData();//判斷一下網絡狀態， 如果為NotAccessible 重新設置一下if(m_NetManager->networkAccessible() == QNetworkAccessManager::NotAccessible){m_NetManager->setNetworkAccessible(QNetworkAccessManager::Accessible);}QNetworkReply *reply = m_NetManager->post(request, data);//這里是我自定義的超時類， 無需理會QReplyTimeOut *pTimeout = new QReplyTimeOut(reply, 1000 * 5);connect(pTimeout, &QReplyTimeOut::timeout, this, [&]{qDebug() << "time out";});connect(reply, SIGNAL(finished()), this, SLOT(replyFinished()));} }

困擾一個多月的問題， 終于解決了。。。果然有問題， 還得多看下文檔。有相同問題的小伙伴可以參考一下。

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