Display Data from C++ to QML

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The object is to display Data in QML

I created a new QML file code above , I would like to communicate C++ class and This QML file, so I tried to use :

QQuickView *view= new QQuickView;
    QQmlContext *c = view->engine()->rootContext();
    c->setContextProperty("myModel",  QVariant::fromValue(projects));

QQuickView *view= new QQuickView;
    QQmlContext *c = view->engine()->rootContext();
    c->setContextProperty("myModel",  QVariant::fromValue(projects));

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Is this an other way simple to do that ??