Question

I’ve got a custom QML object called Target.qml. I would like to create dynamic instances of this object using Qt.createQmlObject().

It works when using builtin qml objects like Image:

var newTarget = Qt.createQmlObject('import Qt 4.7; Image {source: "widgets/SlideSwitchImages/knob.png"; }', parent);

But fails when using any custom object types like:

var newTarget = Qt.createQmlObject('import Qt 4.7; Target {}', parent);

If however I use my custom Target type statically in QML everything works. Is this a known limitation, any workarounds?

Answer 1

If you just need an arbitrary number of Target instances it would be better to use Component.

Component {
    id: targetFactory
    Target {}
}

var newTarget = targetFactory.createObject(parent, properties)

However if you want to stick to the Qt.createQmlObject call I guess you have the Target component in a different directory and you’re just missing out some import statement. The string parameter must be the content of a QML file that works on its own in the same directory as the one calling it.

E.g.

var newTarget = Qt.createQmlObject('import QtQuick 1.0; import "../Targets"; Target {}', parent);

BTW: The Qt 4.7 imports are deprecated because they don’t allow additional versions of QtQuick.