Not able to access members in QML File

[houmingc]

Not able to set, read using QQmlProperty
error:
QQmlComponent: component is not ready
Property value 0
The program has unexpectedly finished. Please kindly assist.

@
-------------qml file------------------------
ApplicationWindow {
visible: true
width: 640
height: 480
title: qsTr("Hello World")

Item {
    property int someNumber:100
}

}
-------------cpp file------------------------

#include <QApplication>
#include <QQmlApplicationEngine>
#include <QQmlComponent>
#include <QQmlProperty>
#include <QDebug>

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

QQmlEngine engine;
QQmlComponent component(&engine,"qrc:///main.qml");
QObject *object=component.create();

qDebug()<<"Property value"<<QQmlProperty::read(object,"someNumber").toInt();

QQmlProperty::write(object,"someNumber",5000);
qDebug()<<"Property value"<&lt;object-&gt;property("someNumber").toInt();

object->setProperty("someNumber",100);

return app.exec&#40;&#41;;

}
@

[p3c0]

Hi,

Few problems here:

1. Use QUrl to load the file from Resource.
   @
   QQmlComponent component(&engine,QUrl("qrc:///main.qml"));
   @

2. component.create() will return 0 if the component is not created. Don't directly go for accessing properties. Always check if it is created beforehand.

3. You cannot directly access the child item's property(property int someNumber) directly. You will need to find it first.

In your case move someNumber to ApplicationWindow.