WebEngine Widgets 最小范例

以 Qt WebEngine Widgets 显示网页。

WebEngine Widgets Minimal Example 演示如何使用 QWebEngineView to render a web page. It shows the minimum amount of code needed to load and display an HTML page, and can be used as a basis for further experimentation.

运行范例

要运行范例从 Qt Creator ，打开欢迎模式，然后选择范例从范例。更多信息，拜访构建和运行范例 .

代码

We first define a commandLineUrlArgument function that returns the URL to open. This is either the first positional argument given on the command line, or https://www.qt.io as a fallback.

#include <QApplication>
#include <QWebEngineView>
QUrl commandLineUrlArgument()
{
    const QStringList args = QCoreApplication::arguments();
    for (const QString &arg : args.mid(1)) {
        if (!arg.startsWith(QLatin1Char('-')))
            return QUrl::fromUserInput(arg);
    }
    return QUrl(QStringLiteral("https://www.qt.io"));
}

在 main function we first set the QCoreApplication::organizationName property. This affects the locations where Qt WebEngine stores persistent and cached data (see also QWebEngineProfile::cachePath and QWebEngineProfile::persistentStoragePath ).

We also set the Qt::AA_EnableHighDpiScaling attribute. This lets the web view automatically scale on high-dpi displays.

Next, we instantiate a QApplication 和 QWebEngineView . The URL to load is taken from commandLineUrlArgument and loaded by calling QWebEngineView::setUrl . The view widget is given a reasonable default size, and shown. Finally, QApplication::exec () launches the main event loop.

int main(int argc, char *argv[])
{
    QCoreApplication::setOrganizationName("QtExamples");
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QApplication app(argc, argv);
    QWebEngineView view;
    view.setUrl(commandLineUrlArgument());
    view.resize(1024, 750);
    view.show();
    return app.exec();
}

要求

The example requires a working internet connection to render the Qt Homepage . An optional system proxy should be picked up automatically. However, for proxies that require a username or password, you need to connect to QWebEnginePage::proxyAuthenticationRequired .

Qt WebEngine Widgets 使用 Qt Quick 场景图形去合成页面。因此，需要 OpenGL 支持。

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