Qt添加第三方字体

最近开发项目时，据说不能用系统自带的微软雅黑字体，于是找一个开源的字体，思源黑体，这个是google和Adobe公司合力开发的可以免费使用。本篇记录一下Qt使用第三方字体的方式。字体从下载之家下载http://www.downza.cn/soft/266042.html。下载解压后有8种字体

代码实现

#include "mainwindow.h"
#include <QFont>
#include <QFontDatabase>
#include <QApplication>
#include <QDebug>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QString path = QCoreApplication::applicationDirPath();
    int fontIndex = 0;
    switch (fontIndex) {
    case 0:
        path = path + QString("/font/SourceHanSans-Bold.otf");
        break;
    case 1:
        path = path + QString("/font/SourceHanSans-CNBold.ttf");
        break;
    case 2:
        path = path + QString("/font/SourceHanSans-ExtraLight.otf");
        break;
    case 3:
        path = path + QString("/font/SourceHanSans-Heavy.otf");
        break;
    case 4:
        path = path + QString("/font/SourceHanSans-Light.otf");
        break;
    case 5:
        path = path + QString("/font/SourceHanSans-Medium.otf");
        break;
    case 6:
        path = path + QString("/font/SourceHanSans-Normal.ttf");
        break;
    case 7:
        path = path + QString("/font/SourceHanSans-Regular.ttf");
        break;
    default:
        path = path + QString("/font/SourceHanSans-CNBold.ttf");
        break;
    }

    int fontId = QFontDatabase::addApplicationFont(path);
    QStringList fontFamilies = QFontDatabase::applicationFontFamilies(fontId);

    if (!fontFamilies.empty())
    {
        QString fontFamily = fontFamilies.at(0);
        QFont defaultFont = a.font();
        defaultFont.setFamily(fontFamily);
        defaultFont.setPixelSize(15);
        a.setFont(defaultFont);
    }

    MainWindow w;
    w.show();
    return a.exec();
}

运行效果：