Csharp 如何在 .net Maui 中制作全屏网格

我试图使一个页面有一个顶行(工具栏)，主要内容在中间，然后沿着屏幕底部的状态栏.如果主要内容太大，那么我希望它滚动.应该很容易，对吧？

下面是我一直在使用的XAML，但似乎无法使其工作.更准确地说，我无法让它在iOS上运行.它在安卓系统上运行良好，但在iOS系统中，它只是在屏幕底部展开，所以我看不到它.

有什么建议吗？

 <Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="100"/>
        <RowDefinition />
        <RowDefinition Height="100"/>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition/>
    </Grid.ColumnDefinitions>

    <BoxView Grid.Column="0" Grid.Row="0" Color="Green"/>

    <Label Text="Row 0, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />

    <BoxView Grid.Row="1" Color="Teal" />

    <ScrollView Grid.Row="1" VerticalOptions="FillAndExpand">
        <StackLayout>
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
            <Label  Text="Row 1, Column 0" HorizontalOptions="Center" VerticalOptions="Center" />
        </StackLayout>
    </ScrollView>
    <BoxView Grid.Row="2"  Color="Red" />
    <Label Grid.Row="2" Text="Row 2, Columns 0 and 1" HorizontalOptions="Center" VerticalOptions="Center" />
</Grid>