我设置了背景颜色和文本颜色以及其他一些颜色属性,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 为深蓝色, SecondaryLight 为黄色
目前我有这个:
我希望它看起来像这样:
我们需要覆盖
FlyoutItemLayoutStyle
、MenuItemLayoutStyle
并修改 CommonStates
和 Selected
中的值。
<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>
对我有用的是制作一个自定义的
FlyoutItemStyle
模板,就像您在 ResourceDictionary 中所做的那样,如下所示:
<Style x:Key="FlyoutItemStyle" TargetType="Grid">
<Setter Property="VisualStateManager.VisualStateGroups">
<VisualStateGroupList>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="Selected">
<VisualState.Setters>
<Setter Property="BackgroundColor" Value="Orange"/>
<Setter TargetName="_label" Property="Label.TextColor" Value="Black" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateGroupList>
</Setter>
</Style>
然后,使用该模板,我更改了弹出项目的外观,类似于我们在官方文档中找到的:
<Shell.ItemTemplate>
<DataTemplate>
<Grid Style="{StaticResource FlyoutItemStyle}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="80" />
<ColumnDefinition Width="150" />
</Grid.ColumnDefinitions>
<Image Source="{Binding FlyoutIcon}"
Margin="10"
HeightRequest="50"
HorizontalOptions="EndAndExpand" />
<Label Grid.Column="1"
Text="{Binding Title}"
TextColor="{StaticResource LightTextColor}"
FontSize="Body"
VerticalTextAlignment="Center"
HorizontalTextAlignment="Start"
x:Name="_label">
</Label>
</Grid>
</DataTemplate>
</Shell.ItemTemplate>
但最关键的部分是使用 x:Name="_label"
属性为 Label 指定名称,以便能够通过选定的目标项找到它 (
TargetName="_label"
)。最后我刚刚添加了我的菜单项(即使在我的情况下有一些
FontAwesome 图标):
<FlyoutItem Title="MyMenuItem">
<FlyoutItem.Icon>
<FontImageSource
FontFamily="{StaticResource FontAwesomeSolid}"
Size="Large"
Glyph="{x:Static fontawesome:FontAwesomeIcons.User}"
Color="{StaticResource LightTextColor}">
</FontImageSource>
</FlyoutItem.Icon>
<ShellContent ContentTemplate="{DataTemplate local:Index}" />
</FlyoutItem>
希望这个答案可以帮助任何尝试自定义菜单每个部分(包括标签颜色)的人。