我正在体验新的QQuickWidget。我如何在QQuickWidget和C++之间进行交互?C++QQuickWidget*view=newQQuickWidget();view->setSource(QUrl::fromLocalFile("myqml.qml"));view->setProperty("test",0);myLayout->addWidget(view);QMLimportQtQuick2.1Rectangle{id:mainWindowwidth:parent.widthheight:parent.heightText{id:textwidth:mainWind