如何使用C++在QML ListModel中插入ListElement？

   Q_OBJECT

   explicit ListModelHandler(QObject *parent = nullptr);

   Q_INVOKABLE void insertElement(const QString &value);

   // 获取ListModel的引用

   QQmlEngine *engine = qmlEngine(this);

   Q_ASSERT(engine);

   QQmlContext *context = engine->rootContext();

   Q_ASSERT(context);

   QObject *listModelObject = context->contextProperty("listModel").value<QObject*>();

   Q_ASSERT(listModelObject);

   QAbstractListModel *listModel = qobject_cast<QAbstractListModel*>(listModelObject);

   Q_ASSERT(listModel);

   // 插入新的ListElement

   int newIndex = listModel->rowCount();

   listModel->beginInsertRows(QModelIndex(), newIndex, newIndex);

   listModel->setData(listModel->index(newIndex), value, Qt::DisplayRole);

   listModel->endInsertRows();

   id: root

   ListModel {

       id: listModel

   }

   ListModelHandler {

       id: listModelHandler

   }

   Component.onCompleted: {

       // 调用insertElement方法插入ListElement

       listModelHandler.insertElement("Value 1");

   }