qt - 如何在QML中动态添加组件？

Question

我试图在按下按钮时动态创建一个组件，然后将其添加到当前父对象。我不确定在这里我做错了什么，

我有这个简单的布局:

import QtQuick 2.0
import Ubuntu.Components 0.1
import "components"
import "componentCreation.js" as MyScript

/*!
    \brief MainView with a Label and Button elements.
*/

MainView {
    // objectName for functional testing purposes (autopilot-qt5)
    objectName: "mainView"

    // Note! applicationName needs to match the "name" field of the click manifest
    applicationName: "com.ubuntu.developer..SpritePractice"

    /*
     This property enables the application to change orientation
     when the device is rotated. The default is false.
    */
    //automaticOrientation: true

    width: units.gu(100)
    height: units.gu(75)

    Page {
        title: i18n.tr("Simple")

        Column {
            spacing: units.gu(1)
            anchors {
                margins: units.gu(2)
                fill: parent
            }

            Button
            {
                text: i18n.tr("Hello World!!");
                onClicked:
                {
                    var component;
                    var sprite;
                    component = Qt.createComponent("Sprite.qml");
                    sprite = component.createObject(parent, {"x": 100, "y": 100});
                }
            }
        }
    }
}

这是我要添加的“sprite”:

import QtQuick 2.0

Rectangle { width: 80; height: 50; color: "red" }

如何将要创建的组件添加到当前父组件？

解决方法:

我使用以下答案，并使用Ubuntu文档:

http://developer.ubuntu.com/api/qml/sdk-1.0/QtQml.qtqml-javascript-dynamicobjectcreation/#creating-objects-dynamically

Answer 1

您需要在此处提供ID，而不是父级。

sprite = component.createObject(parent, {"x": 100, "y": 100});

尝试跟随，

Page {
        ...

        Column {
            id: container                
            ...
            Button
            {
                text: i18n.tr("Hello World!!");
                onClicked:
                {
                    var component;
                    var sprite;
                    component = Qt.createComponent("Sprite.qml");
                    sprite = component.createObject(container, {"x": 100, "y": 100});
                }
            }
        }
    }

我还创建了一个sample code，它也一样，请看看