c++ - BB 10 Cascades 互联网检查

Question

如果出现套接字错误，我需要检查 Internet 连接。我是这样进行的，

void Client::socketError(QAbstractSocket::SocketError socketError) {
   HttpPost("https://www.google.co.in/");
}

void Client::HttpPost(QString URL ) {

    QNetworkRequest request = QNetworkRequest();
    request.setUrl(QUrl(URL));

    QNetworkAccessManager *mNetworkAccessManager = new QNetworkAccessManager(this);
    bool result = connect(mNetworkAccessManager, SIGNAL(finished(QNetworkReply*)),
                          this, SLOT(HttpResponse(QNetworkReply *)));

    mNetworkAccessManager->get(request);
    qDebug() << "::: Client.cpp  Request made to Service :::";
}

void Client::HttpResponse(QNetworkReply* reply) {

    if (reply->error() == QNetworkReply::NoError) {
        qDebug() << "\n  Internet Ok **********";
    } else {
        qDebug() << "\n No Internet **********" << reply->errorString();
        showDialog("No Inernet");
    }
}

我正在连接信号和插槽，例如

connect(socket, SIGNAL(error(QAbstractSocket::SocketError)),
        this, SLOT(socketError(QAbstractSocket::SocketError)));

但有时我会收到“没有 Internet 对话框”，即使 wi-fi 可用。为什么？

---

方法二:

// this method will return true If Net is available false other wise
// but even this is return false some times even Wi fi signal is Available 

bool Client::isNetworkAvailable() {
    bool isFound = false;
    QNetworkConfigurationManager netMgr;
    QList<QNetworkConfiguration> mNetList = netMgr.allConfigurations(QNetworkConfiguration::Active);

    if (mNetList.count() > 0) {
            if (netMgr.isOnline()) {
                isFound = true;
            }
    }
    qDebug() << "\n ************** isNetworkAvailable:::" << isFound;
    return isFound;
}

我的代码有问题吗？

Answer 1

您的网络检查片段似乎有点太复杂了。您可以简单地调用以下方法:

bool QNetworkConfigurationManager::isOnline () const

Returns true if the system is considered to be connected to another device via an active network interface; otherwise returns false.

如果这对某人不起作用，则很可能意味着互联网连接不可靠，尤其是当它不是随机工作时。