Xamarin表单滚动视图将内容缩减了一半

Question

当我向下滚动时，我的内容不会滚动到底部。内容被削减了一半。我怎么处理这个？

 <ScrollView VerticalOptions="FillAndExpand">

        <StackLayout>

            <!--FirstPage-->
            <AbsoluteLayout VerticalOptions="FillAndExpand">
            <Image Source="mapa.png" Aspect="Fill" AbsoluteLayout.LayoutBounds="0,0,1,1" AbsoluteLayout.LayoutFlags="All"/>

            /// content ///

            </AbsoluteLayout>


            <!--SecondPage-->

            <AbsoluteLayout  VerticalOptions="FillAndExpand">

            <Image Source="mapa.png" Aspect="Fill" AbsoluteLayout.LayoutBounds="0,0,1,1" AbsoluteLayout.LayoutFlags="All"/>

            /// content ///

            </AbsoluteLayout>

        </StackLayout>

    </ScrollView>