Qt 如何将子项动态附加到具有子项别名的QML项

假设我有一个TestComponent.qml，它对子项使用别名。组件文件如下所示：

TestComponent.qml

import QtQuick 2.5
Column {
    default property alias children: cont.children;

    Text {
        text: "header"
    }
    Column {
        id: cont
    }
    Text {
        text: "footer"
    }
}

import QtQuick 2.5
Column {
    default property alias children: cont.children;
    property alias childCont: cont

    Text {
        text: "header"
    }
    Column {
        id: cont
    }
    Text {
        text: "footer"
    }
}

然后我有一个主文件，在那里我实例化了组件。如果通过静态组件实例化添加子组件文本，它将按预期显示在页眉和页脚之间。但是，如果动态添加子组件，它将忽略子别名并在页脚后添加子组件。该文件如下所示：

main.qml

import QtQuick 2.5
import QtQuick.Controls 1.4

ApplicationWindow {
    visible: true
    width: 200
    height: 200

    TestComponent {
        id: t1
        Text {
            text: "body"
        }
    }
    Component {
        id: txt
        Text {
            text: "body1"
        }
    }
    Component.onCompleted: {
        txt.createObject(t1)
    }
}

import QtQuick 2.5
import QtQuick.Controls 1.4

ApplicationWindow {
    visible: true
    width: 200
    height: 200

    TestComponent {
        id: t1
        Text {
            text: "body"
        }
    }
    Component {
        id: txt
        Text {
            text: "body1"
        }
    }
    Component.onCompleted: {
        txt.createObject(t1.childCont)
    }
}

输出为：

header
body
footer
body1

---

有没有办法使别名对动态组件创建也是透明的？理想情况下，不使用C++。

< p>它不回答问题，但是绕过这个问题的方法可能是，通过属性别名使组件中的预期父项可访问，并将其用作CealObjt函数调用中的父参数。这是密码

TestComponent.qml

import QtQuick 2.5
Column {
    default property alias children: cont.children;

    Text {
        text: "header"
    }
    Column {
        id: cont
    }
    Text {
        text: "footer"
    }
}

import QtQuick 2.5
Column {
    default property alias children: cont.children;
    property alias childCont: cont

    Text {
        text: "header"
    }
    Column {
        id: cont
    }
    Text {
        text: "footer"
    }
}

main.qml

import QtQuick 2.5
import QtQuick.Controls 1.4

ApplicationWindow {
    visible: true
    width: 200
    height: 200

    TestComponent {
        id: t1
        Text {
            text: "body"
        }
    }
    Component {
        id: txt
        Text {
            text: "body1"
        }
    }
    Component.onCompleted: {
        txt.createObject(t1)
    }
}

import QtQuick 2.5
import QtQuick.Controls 1.4

ApplicationWindow {
    visible: true
    width: 200
    height: 200

    TestComponent {
        id: t1
        Text {
            text: "body"
        }
    }
    Component {
        id: txt
        Text {
            text: "body1"
        }
    }
    Component.onCompleted: {
        txt.createObject(t1.childCont)
    }
}

输出：

header
body
body1
footer