如何在 Xamarin Forms 中使用附加属性，例如 Grid.Row、AbsoluteLayout.LayoutFlags 到 OnPlatform 标记 [英] How to use attached properties such as Grid.Row, AbsoluteLayout.LayoutFlags to OnPlatform tag in Xamarin Forms

问题描述

现在，我尝试使用以下代码

For now, I tried with below code

<StackLayout>
    <StackLayout.Grid.Row>
        <OnPlatform ... />
    </StackLayout.Grid.Row>
</StackLayout>

还有

<StackLayout>
    <Grid.Row>
        <OnPlatform ... />
    </Grid.Row>
</StackLayout>

没有任何效果

推荐答案

使用 StaticResource

即:

  <AbsoluteLayout>
    <StackLayout AbsoluteLayout.LayoutBounds="{StaticResource ContainerPosition}" AbsoluteLayout.LayoutFlags="None">
      <BoxView AbsoluteLayout.LayoutBounds="{StaticResource BoxPosition}" Color="Maroon"/>
    </StackLayout>
    <AbsoluteLayout.Resources>
      <ResourceDictionary>
        <OnIdiom x:Key="BoxPosition" x:TypeArguments="Rectangle" Phone="82,26,60,46" Tablet="111,0,60,46"/>
        <OnPlatform x:Key="ContainerPosition" x:TypeArguments="Rectangle" iOS="100,100,100,100" Android="100,80,100,110" Windows="100,120,100,100"/>
      </ResourceDictionary>
    </AbsoluteLayout.Resources>
  </AbsoluteLayout>

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