如何动态地将大量数据暴露给QML

#include <QObject>

class DataHandler : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QStringList dataList READ getDataList NOTIFY dataListChanged)

public:
    explicit DataHandler(QObject *parent = nullptr);

    QStringList getDataList() const;

signals:
    void dataListChanged();

private:
    QStringList m_dataList;
};

#include "datahandler.h"

DataHandler::DataHandler(QObject *parent) : QObject(parent)
{
    // 在这里获取大量数据，存储到m_dataList中
    // 示例中，简单地添加一些示意数据
    m_dataList << "Data 1" << "Data 2" << "Data 3";
}

QStringList DataHandler::getDataList() const
{
    return m_dataList;
}

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include "datahandler.h"

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

    // 注册DataHandler类到QML
    qmlRegisterType<DataHandler>("com.example", 1, 0, "DataHandler");

    QQmlApplicationEngine engine;
    const QUrl url(QStringLiteral("qrc:/main.qml"));
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
                     &app, [url](QObject *obj, const QUrl &objUrl) {
        if (!obj && url == objUrl)
            QCoreApplication::exit(-1);
    }, Qt::QueuedConnection);
    engine.load(url);

    return app.exec();
}

import com.example 1.0

Item {
    width: 200
    height: 200

    DataHandler {
        id: dataHandler
    }

    ListView {
        width: parent.width
        height: parent.height
        model: dataHandler.dataList

        delegate: Text {
            text: modelData
        }
    }
}