我已经设置了背景颜色和文本颜色以及一些其他颜色属性，例如禁用和未选择的颜色，但似乎都没有更改所选项目的背景颜色。
如果我必须更改以下属性才能使其看起来像我想要的那样？或者我需要在我的代码中添加什么？
我有以下内容：
<Shell xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
Title="Example"
x:Class="TrackBus.AppShell"
FlyoutHeaderBehavior="CollapseOnScroll"
FlyoutBackgroundColor="{StaticResource Primary}">
<Shell.Resources>
<ResourceDictionary>
<Style x:Key="BaseStyle" TargetType="Element">
<Setter Property="Shell.BackgroundColor" Value="{StaticResource Primary}" />
<Setter Property="Shell.ForegroundColor" Value="White" />
<!--Foreground is the menu icon color-->
<Setter Property="Shell.TitleColor" Value="White" />
<Setter Property="Shell.DisabledColor" Value="Magenta" />
<Setter Property="Shell.UnselectedColor" Value="Cyan" />
</Style>
<Style TargetType="FlyoutItem" BasedOn="{StaticResource BaseStyle}" />
<Style Class="FlyoutItemLabelStyle" TargetType="Label">
<Setter Property="TextColor" Value="Cyan"></Setter>
</Style>
<Style Class="FlyoutItemLayoutStyle" TargetType="Layout" ApplyToDerivedTypes="True">
<Setter Property="BackgroundColor" Value="Magenta"></Setter>
<Setter Property="VisualStateManager.VisualStateGroups">
<VisualStateGroupList>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal">
<VisualState.Setters>
<Setter Property="BackgroundColor" Value="{StaticResource Secondary}" />
<Setter TargetName="FlyoutItemLabel" Property="Label.TextColor" Value="Blue"/>
</VisualState.Setters>
</VisualState>
<VisualState x:Name="Selected">
<VisualState.Setters>
<Setter Property="BackgroundColor" Value="{StaticResource SecondaryLight}" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateGroupList>
</Setter>
</Style>
<Style Class="MenuItemLayoutStyle" TargetType="Layout" ApplyToDerivedTypes="True">
<Setter Property="VisualStateManager.VisualStateGroups">
<VisualStateGroupList>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal">
<VisualState.Setters>
<Setter TargetName="FlyoutItemLabel" Property="Label.TextColor" Value="{StaticResource SecondaryLight}" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateGroupList>
</Setter>
</Style>
</ResourceDictionary>
</Shell.Resources>
<Shell.ItemTemplate>
<DataTemplate>
<Grid ColumnDefinitions="60,Auto">
<Image Source="{Binding FlyoutIcon}"
Margin="5"
HeightRequest="35" />
<Label Grid.Column="1"
Text="{Binding Title}"
VerticalTextAlignment="Center"
FontSize="Title"
TextColor="{StaticResource SecondaryLight}" />
</Grid>
</DataTemplate>
</Shell.ItemTemplate>
<Shell.MenuItemTemplate>
<DataTemplate>
<Grid ColumnDefinitions="60,Auto">
<Image Source="{Binding Icon}"
Margin="5"
HeightRequest="35" />
<Label Grid.Column="1"
Text="{Binding Text}"
VerticalTextAlignment="Center"
FontSize="Title"
TextColor="{StaticResource SecondaryLight}"/>
</Grid>
</DataTemplate>
</Shell.MenuItemTemplate>
Primary是深蓝色的并且二次光是黄色的
目前我有这个：
我希望它看起来像这样：
我们需要重写FlyoutItemLayoutStyle ,MenuItemLayoutStyle 并修改其中的值CommonStates and Selected .
<Style Class="FlyoutItemLayoutStyle" TargetType="Layout" ApplyToDerivedTypes="True">
<Setter Property="VisualStateManager.VisualStateGroups">
<VisualStateGroupList>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal">
<VisualState.Setters>
<Setter Property="BackgroundColor" Value="Transparent" />
<Setter TargetName="FlyoutItemLabel" Property="Label.TextColor" Value="Orange" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="Selected">
<VisualState.Setters>
<Setter Property="BackgroundColor" Value="Orange" />
<Setter TargetName="FlyoutItemLabel" Property="Label.TextColor" Value="Black" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateGroupList>
</Setter>
</Style>
<!--
Custom Style you can apply to any Flyout Item
-->
<Style Class="MenuItemLayoutStyle" TargetType="Layout" ApplyToDerivedTypes="True">
<Setter Property="VisualStateManager.VisualStateGroups">
<VisualStateGroupList>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal">
<VisualState.Setters>
<Setter Property="BackgroundColor" Value="Transparent" />
<Setter TargetName="FlyoutItemLabel" Property="Label.TextColor" Value="Orange" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="Selected">
<VisualState.Setters>
<Setter Property="BackgroundColor" Value="Orange" />
<Setter TargetName="FlyoutItemLabel" Property="Label.TextColor" Value="Black" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateGroupList>
</Setter>
</Style>
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