use：clang。

.vscode/settings.json

@@ -24,7 +24,7 @@
         "-Wno-dev"
     ],
     "cmake.configureSettings": {
-        "CMAKE_PREFIX_PATH": "C:/Qt/Qt5.12.12/5.12.12/msvc2017_64"
+        "CMAKE_PREFIX_PATH": "C:/Qt/Qt6"
     },
     "cmake.options.statusBarVisibility": "visible",
     "cmake.generator": "Ninja",

MainWidget.cpp

@@ -1107,7 +1107,7 @@ if (re.match("123-45-6789").hasMatch()) {
     qDebug() << "Valid SSN";
 }
 )";
-    //textBrowser->setMarkdown(markdownContent);
+    textBrowser->setMarkdown(markdownContent);
     textBrowser->setText(markdownContent);
     layout->addWidget(textBrowser);
     dialog->exec();

main.cpp

@@ -16,10 +16,10 @@ int main(int argc, char *argv[])
     // a.setStyle("windows");
 #endif
 
-    QFile file(":/QtTheme/theme/Flat/Light/Blue/Pink.qss");
-    if (file.open(QFile::ReadOnly)) {
-        a.setStyleSheet(file.readAll());
-    }
+    // QFile file(":/QtTheme/theme/Flat/Light/Blue/Pink.qss");
+    // if (file.open(QFile::ReadOnly)) {
+    //     a.setStyleSheet(file.readAll());
+    // }
 
 #if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
     QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);