快：附加属性类型

附加属性必须附加到派生自特定类型的对象上

发生了什么？

你在错误类型的对象中实例化了附加属性。

为什么会这样？

附加属性将不起作用。

示例

import QtQuick

Item {
    QtObject {
        LayoutMirroring.enabled: true
    }
}

要修复此警告，请将外层类型改为从警告信息中提到的类型继承：

import QtQuick

Item {
    Item {
        LayoutMirroring.enabled: true
    }
}

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