使用QQuickWidget设置QML主题

#include <QApplication>
#include <QQuickWidget>

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

    QQuickWidget *quickWidget = new QQuickWidget;
    quickWidget->setSource(QUrl("qrc:/main.qml")); // 设置QML文件路径
    quickWidget->show();

    return app.exec();
}

import QtQuick 2.0

Rectangle {
    width: 400
    height: 300
    color: "lightgray"

    Text {
        text: "Hello, QML!"
        font.pixelSize: 24
        anchors.centerIn: parent
    }
}

import QtQuick 2.0

Rectangle {
    width: 400
    height: 300
    color: "lightgray"

    Text {
        text: "Hello, QML!"
        font.pixelSize: 24
        anchors.centerIn: parent
        color: "blue"
    }
}

QQuickWidget *quickWidget = new QQuickWidget;
quickWidget->setSource(QUrl("qrc:/main.qml"));
quickWidget->setStyleSheet("QQuickWidget { background-color: yellow; }");
quickWidget->show();