add load font

main.cpp

@@ -1,10 +1,15 @@
 #include "mainwindow.h"
 
 #include <QApplication>
+#include <QFontDatabase>
 
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
+    int fontId = QFontDatabase::addApplicationFont(":/materialdesignicons-webfont.ttf");
+    QString fontName = QFontDatabase::applicationFontFamilies(fontId).constFirst();
+    qDebug() << "fontId" << fontId << ", fontName:" << fontName;
+
     MainWindow w;
     w.show();
     return a.exec();