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Forum Update on Monday, May 27th 2025

How to fetch listtype data from qml to cpp?

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qmlqqmlcomponentqqmlengineqmetaobjectinvokemethod
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  • J Offline
    J Offline
    Joshika_Namani
    wrote on 15 Dec 2021, 09:16 last edited by
    #1

    In below program I have used QmlComponent and QMetaObject::invokeMethod its getting for single value but for list it showing error:"ASSERT failure in QList<T>::operator[]: "index out of range"
    Here My code:

    main.cpp
    QQmlEngine engine;
    QQmlComponent component(&engine,QUrl(QStringLiteral("qrc:/MyItem.qml")));
    QObject *object = component.create();
    QVariant returnedValue;
    QMetaObject::invokeMethod(object, "names",
    Q_RETURN_ARG(QVariant, returnedValue));
    qDebug() << "QML function returned:" << returnedValue.toString();
    delete object;

    main.qml

    Item {
    property string name: "apple"
    property string two: "banana"
    property string three: "mango"
    property string one: "lemon"
    property string four: "watermelon"
    property string five: "pineapple"
    property var list: [name,two,three,one,five,four]
    function names()
    {
    console.log("names function");
    var arr= [name,two,three,one,five,four];
    return arr;
    }
    }

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    15 Dec 2021, 09:16

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