我有这个:
<RelativeLayout HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" BackgroundColor="Red">
<StackLayout Orientation="Vertical" VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand" Padding="0,15" Spacing="10"></StackLayout>
</RelativeLayout>
但出于某些原因,尽管RelativeLayout明显扩展了,但StackLayout并没有。我该如何使StackLayout水平拉伸并填充整个屏幕的宽度/高度?