添加文件

main.cpp

+#include <QGuiApplication>
+#include <QQmlApplicationEngine>
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+
+    QGuiApplication app(argc, argv);
+
+    QQmlApplicationEngine engine;
+
+    const QUrl windowLogin(QStringLiteral("qrc:/Login/login.qml"));
+    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
+                     &app, [windowLogin](QObject *obj, const QUrl &objUrl) {
+        if (!obj && windowLogin == objUrl)
+            QCoreApplication::exit(-1);
+    }, Qt::QueuedConnection);
+    engine.load(windowLogin);
+
+    return app.exec();
+}