附加属性的复用
qmllint 将此警告类别拼写为“[attached-property-reuse] ”。
在父作用域中已初始化的关联类型被重复使用
发生了什么？
您多次初始化了一个会传播的关联类型。
注意：这 主要发生在继承自 `QQuickAttachedPropertyPropagator` 的附加类型上。
为什么这不好？
传播型附加对象在每次实例化时都会消耗内存，但实际上只需初始化一次。
示例
import QtQuick
import QtQuick.Templates as T
import QtQuick.Controls.Material // contains the Material attached type
T.ToolBar {
id: control
// first instantiation of Material's attached property
property color c: Material.toolBarColor
background: Rectangle {
// second instantiation of Material's attached property, wrong!
color: Material.toolBarColor
}
}要解决此警告，请从父类查询该附着类型：
import QtQuick
import QtQuick.Templates as T
import QtQuick.Controls.Material // contains the Material attached type
T.ToolBar {
id: control
// first instantiation of Material's attached property
property color c: Material.toolBarColor
background: Rectangle {
// use control's attached property, correct!
color: control.Material.toolBarColor
}
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