Javascript 如何在qml中动态创建组件

我引用了此链接，在同一窗口中单击按钮时，将componentRectangle组件添加到main.qml窗口中我的qt中没有安装Ubuntu.Components。我不懂javascript。这里引用componentCreation.js。这意味着什么？ 我是qml的初学者。我需要知道是否有一种只使用qml动态加载qml组件的方法。

main.qml

import QtQuick 2.6
import QtQuick.Window 2.2
import QtQuick.Controls 1.4

Window {
    id:appWindow
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")
    property int count: 0
    signal forward
    function fun1(argument1){
     console.log("A function fun1()in the main QML file is invoked by dynmic object")
     console.log("Returned parameter from the QML dynamic objects = ", argument1)
     }

    Item {
        id: root
        width: parent.width
        height: parent.width
        function createItem() {
            Qt.createQmlObject("import QtQuick 2.5; Rectangle { x: 100; y: 100; width: 100; height: 100; color: \"blue\" }", root, "dynamicItem");
        }
    }

    Button{
        width: 200
        height: 50
        text:"Click Me"
        y:400
        x:350
        onClicked: {
            count++
            if(count==1)
            Qt.createComponent("Sprite.qml").createObject(appWindow, {"x": 100, "y": 100});
            if(count===2){
                appWindow.forward()
            }
       }
   }
   onForward:console.log("forward signal is emitted in main QML")
}

Sprite.qml

import QtQuick 2.0

Rectangle {
    id:idRect
    signal buttonClicked()
    width: 80;
    height: 50;
    color: "red";
    x:10;
    y:100
    property string fromCallee:'This value is send signal argument'
    signal send(string pass);
    MouseArea {
                  id: leftMouseArea
                  anchors.fill: parent
                  onClicked:idRect.buttonClicked()
              }
     Component.onCompleted:{
     forward.connect(fun2);
     send.connect(fun1);
     send(fromCallee);
     }
      function fun2(){
          console.log('signal received at dynamic object')
          console.log("value of main qml property 'count'="+count)
      }
}

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您可以从开始，也可以仅使用qml动态加载qml组件。但是你想达到什么目的呢？您的问题应该提到这一点，以及您解决问题的尝试。感谢您的评论。！！这些文件很有帮助。他也很高兴