将子QtQuck QML中的值传递给主QML

Item {
    signal valueChanged(string newValue)
    property string value: "initial value"

    function updateValue(newValue) {
        value = newValue;
        valueChanged(newValue);
    }
}

import QtQuick 2.0

Item {
    ChildQML {
        id: childQML

        onValueChanged: {
            console.log("New value received:", newValue);
        }
    }

    Button {
        text: "Update Value"
        onClicked: childQML.updateValue("new value")
    }
}