我在QT 5.2中編寫了一個簡單的WebView應用程序。我使用的網站有點沉重,因此我需要緩存它。但問題是,當點擊一個頁面並訪問子頁面時,我得到了QIODevice::read: device not open
錯誤。最後,我得到一個空白的白頁。我哪裏做錯了?QWebView緩存
下面的代碼:
WebsiteWidget::WebsiteWidget(QWidget *parent) :
QWidget(parent)
{
m_url = QUrl("http://www.google.com/");
QWebSettings::globalSettings()->setAttribute(QWebSettings::DeveloperExtrasEnabled, true);
QWebSettings::globalSettings()->setAttribute(QWebSettings::LocalStorageEnabled, true);
QWebSettings::globalSettings()->setAttribute(QWebSettings::JavascriptEnabled, true);
QWebSettings::globalSettings()->setAttribute(QWebSettings::PluginsEnabled, true);
m_websiteContentLayout = new QHBoxLayout();
m_webView = new QWebView(this);
QNetworkAccessManager* manager = new QNetworkAccessManager(this);
QNetworkDiskCache* diskCache = new QNetworkDiskCache(this);
QString location = QStandardPaths::writableLocation(QStandardPaths::CacheLocation);
diskCache->setCacheDirectory(location);
manager->setCache(diskCache);
m_webView->page()->setNetworkAccessManager(manager);
m_webView->page()->settings()->setMaximumPagesInCache(10);
QNetworkRequest request = QNetworkRequest();
request.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache);
request.setUrl(m_url);
connect(manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(replyFinished(QNetworkReply*)));
manager->get(request);
m_websiteContentLayout->addWidget(m_webView);
m_websiteContentLayout->setContentsMargins(0, 0, 0, 0);
this->setLayout(m_websiteContentLayout);
}
void WebsiteWidget::replyFinished(QNetworkReply* reply)
{
QByteArray data=reply->readAll();
QString str(data);
if(reply->url() == m_url)
{
m_webView->setHtml(str, reply->url());
}
}
我遇到同樣的症狀,但我不使用緩存。 – Dasun
對我而言,這是本地html文件的錯誤路徑。希望它可以幫助你。 – Dasun