Qml组件小知识

QtObject {
    Component.onCompleted: console.log("Completed")
    Component.onDestruction: console.log("Destruction")
}

Component {
    id: component
    Text {
        text: "Component"
    }
}

Loader {
    sourceComponent: component
    onProgressChanged: console.log(progress)
}

object createQmlObject(qml, 
                       object parent, 
                       string filepath)

var object = Qt.createQmlObject('import QtQuick 2.0; Rectangle {color: "blue"; width: 50; height: 50}',
                                   root,
                                   "error.txt");

object createComponent(url, mode, parent)
object createObject(parent, object properties)

var component = Qt.createComponent("MyComponent.qml");
if (component.status == Component.Ready)
    component.createObject(parent, {x: 100, y: 100});