qt使用本地字体文件

qml工程设置使用本地字体文件

#include <QGuiApplication>
#include <QQmlApplicationEngine>

#include <QDebug>
#include <QFontDatabase>

int main(int argc, char *argv[])
{
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QGuiApplication app(argc, argv);
#if 1
    QFontDatabase database;
    QString fontPath = "/opt/font/default.ttf";
    int fontId = QFontDatabase::addApplicationFont(fontPath);
    int count = 0;
    qWarning() << "applicationFontFamilies: " << QFontDatabase::applicationFontFamilies(fontId);
    foreach (const QString &family, database.families())
    {
        qWarning() << count++ << ": " << family;
        foreach (const QString &strStyle, database.styles(family))
        {
            QString strSizes;
            foreach (int points, database.smoothSizes(family, strStyle))
            {
                strSizes += QString::number(points) + " ";
            }
            qDebug() << "\t" << strStyle.toStdString().c_str() << "\t" << strSizes.toStdString().c_str();
        }
    }
    if(fontId >= 0)
    {
        QGuiApplication::setFont(QFont(QFontDatabase::applicationFontFamilies(fontId).at(0)));
    }
    else
    {
        qWarning() << QString("无法使用字体文件%1").arg(fontPath);
        QGuiApplication::setFont(QFont("思源黑体"));
    }
#endif
    QQmlApplicationEngine engine;
    const QUrl url(QStringLiteral("qrc:/main.qml"));
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
                     &app, [url](QObject *obj, const QUrl &objUrl) {
        if (!obj && url == objUrl)
            QCoreApplication::exit(-1);
    }, Qt::QueuedConnection);
    engine.load(url);

    return app.exec();
}