当它背后的内容时，iOS上的appshell tabar颜色会更改

Question

我遇到与此问题。塔巴尔后面有内容时会更改颜色。但是，如这个问题所述，如果他们删除了渲染器，那么他们的问题就会停止。我目前根本没有渲染器，仍然有这个问题。我代码中没有此问题的唯一部分是页面不在shell层次结构中，并且已导航到使用以下代码行：

var search = new SearchList();
Navigation.PushAsync(search);

导航到使用以下代码的样式的页面TABBAR问题：

await Shell.Current.GoToAsync($"//{nameof(MemberList)}");

不同页面背后的XAML和代码完全相同。唯一的区别是一个在Appshell层次结构（会员列表）中定义一个，另一个不是（搜索清单），如下所示：

<Shell xmlns="http://xamarin.com/schemas/2014/forms" 
       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
       xmlns:local="clr-namespace:SampleYE.Views"
       Title="SampleYE"
       x:Class="SampleYE.AppShell"
      >

    <!--
        The overall app visual hierarchy is defined here, along with navigation.
    
        https://learn.microsoft.com/xamarin/xamarin-forms/app-fundamentals/shell/
    -->

    <Shell.Resources>
        <ResourceDictionary>
            <Style x:Key="BaseStyle" TargetType="Element">
                <Setter Property="Shell.BackgroundColor" Value="{StaticResource Primary}" />
                <Setter Property="Shell.ForegroundColor" Value="{StaticResource Secondary}" />
                <Setter Property="Shell.TitleColor" Value="{StaticResource Secondary}" />
                <Setter Property="Shell.DisabledColor" Value="#AD94BB" />
                <Setter Property="Shell.UnselectedColor" Value="{StaticResource Tertiary}" />
                <Setter Property="Shell.TabBarBackgroundColor" Value="{StaticResource Primary}" />
                <Setter Property="Shell.TabBarForegroundColor" Value="{StaticResource Secondary}"/>
                <Setter Property="Shell.TabBarUnselectedColor" Value="{StaticResource Tertiary}"/>
                <Setter Property="Shell.TabBarTitleColor" Value="{StaticResource Secondary}"/>
            </Style>
            <Style TargetType="TabBar" BasedOn="{StaticResource BaseStyle}" />
            <Style TargetType="FlyoutItem" BasedOn="{StaticResource BaseStyle}" />
        </ResourceDictionary>
    </Shell.Resources>

    <TabBar>
        <ShellContent Route="StartupPage" Shell.FlyoutBehavior="Disabled" ContentTemplate="{DataTemplate local:StartupPage}" />
    </TabBar>

    <TabBar>
        <Tab Title="Directory" Icon="icon_feed.png">
            <ShellContent  Route="MemberList" ContentTemplate="{DataTemplate local:MemberList}"/>
        </Tab> 
        <Tab Title="Profile" Icon="icon_about.png">
            <ShellContent Route="ProfilePage1" ContentTemplate="{DataTemplate local:ProfilePage1}" />
        </Tab>                  
    </TabBar>

    <!--
        If you would like to navigate to this content you can do so by calling
        await Shell.Current.GoToAsync("//LoginPage");
    -->
    <TabBar>
        <ShellContent Route="LoginPage1" Shell.FlyoutBehavior="Disabled" ContentTemplate="{DataTemplate local:LoginPage1}" />
    </TabBar>


</Shell>

与该问题的页面的定义如下：

<ContentPage
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    x:Class="SampleYE.Views.MemberList">
    <ContentPage.Content>
        <ListView x:Name="listView" ItemSelected="OnItemSelected" IsGroupingEnabled="true">
            <ListView.GroupHeaderTemplate>
                <DataTemplate>
                    <ViewCell>
                        <StackLayout Padding="5,0,0,0" VerticalOptions="StartAndExpand" Orientation="Vertical">
                            <Label Text="{Binding Title}" VerticalTextAlignment="Center" />
                        </StackLayout>
                    </ViewCell>
                </DataTemplate>
            </ListView.GroupHeaderTemplate>
            <ListView.ItemTemplate>
                <DataTemplate>
                    <ViewCell>
                        <StackLayout HorizontalOptions="StartAndExpand" Orientation="Horizontal">
                            <Image WidthRequest="44" HeightRequest="44" Source="{Binding Photo}" />
                            <StackLayout Padding="5,0,0,0" VerticalOptions="StartAndExpand" Orientation="Vertical">
                                <Label Text="{Binding Name}" VerticalTextAlignment="Center" Font="Medium" />
                                <Label Text="{Binding Title}" VerticalTextAlignment="Center" Font="Micro" />
                            </StackLayout>
                        </StackLayout>
                    </ViewCell>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
    </ContentPage.Content>
</ContentPage>

<ContentPage.Content>
        <Grid RowDefinitions="Auto">

                <ScrollView Grid.Row="0" >
                    <Grid RowDefinitions="Auto,Auto,Auto,Auto" ColumnDefinitions="*,*" VerticalOptions="CenterAndExpand"
                            RowSpacing="25">
                            <Frame Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" BorderColor="{StaticResource Secondary}"
                                    VerticalOptions="Start" HorizontalOptions="Center" WidthRequest="150" HeightRequest="150"
                                    CornerRadius="75" HasShadow="False" Padding="0" IsClippedToBounds="True">
                                <Image Source="Profile" Aspect="AspectFill"/>
                            </Frame>
                            <Button Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" 
                                TextColor="{StaticResource Primary}" BackgroundColor="{StaticResource Secondary}"
                                HeightRequest="54" WidthRequest="54" CornerRadius="27" TranslationX="65"
                                ImageSource="Camera" HorizontalOptions="Center" VerticalOptions="End"/>
                
                            <Frame Grid.Row="2" Grid.ColumnSpan="2" IsClippedToBounds="True"
                                Margin="20,20,20,0" CornerRadius="15" Padding="0,20,0,20"    >
                                <Grid RowDefinitions="*,*,*" ColumnDefinitions="*,*,*,*" RowSpacing="12" ColumnSpacing="5">
                                    <Label Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2" HorizontalTextAlignment="Center"
                                            Text="Calvin"/>
                                    <Label Grid.Row="0" Grid.Column="2" Grid.ColumnSpan="2" HorizontalTextAlignment="Center"
                                            Text="Carter"/>
                                    <Label Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" HorizontalTextAlignment="Center"
                                          Text="Ace"/>
                                    <Label Grid.Row="1" Grid.Column="2" Grid.ColumnSpan="2" HorizontalTextAlignment="Center"
                                           Text="Wrecking Ball"/>
                                    <Label Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="2" HorizontalTextAlignment="Center"
                                            Text="Spring"/>
                                    <Label Grid.Row="2" Grid.Column="2" Grid.ColumnSpan="2" HorizontalTextAlignment="Center"
                                            Text="2014"/>
                                </Grid>
                            </Frame>
                 
                            <Frame Grid.Row="3" Grid.ColumnSpan="2" IsClippedToBounds="False"
                                    Margin="20,20,20,0" CornerRadius="15" Padding="0,20,0,45" >
                                    <Grid RowDefinitions="*,Auto,Auto,*" ColumnDefinitions="*,*,*,*" RowSpacing="20" ColumnSpacing="5" >
                                        <Label Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="4" HorizontalTextAlignment="Center"
                                             Text="02/01/1994"/>
                                        <Label Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="4" HorizontalTextAlignment="Center"
                                             Text="Wreckingball14"/>
                                        <Label Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="2" HorizontalTextAlignment="Center"
                                             Text="[email protected]"/>
                                        <Label Grid.Row="2" Grid.Column="2" Grid.ColumnSpan="2" HorizontalTextAlignment="Center"
                                                 Text="Wrecking Ball"/>
                                        <Label Grid.Row="3" Grid.Column="0" Grid.ColumnSpan="2" HorizontalTextAlignment="Center"
                                              Text="Spring"/>
                                         <Label Grid.Row="3" Grid.Column="2" Grid.ColumnSpan="2" HorizontalTextAlignment="Center"
                                              Text="2014"/>
                                     </Grid>
                             </Frame>
                  
                            <Grid
                                 Grid.Row="4" Grid.ColumnSpan="2" IsClippedToBounds="False"
                                Margin="20,0,20,0"  Padding="0,20,0,20"
                                    RowDefinitions="Auto,Auto" ColumnDefinitions="*,*" RowSpacing="20" >
                        
                                <Frame IsClippedToBounds="true" Grid.Row="0" Grid.ColumnSpan="2" 
                                           Padding="0"
                                         CornerRadius="15">
                                      <Editor HeightRequest="70" x:Name="interestEntry"
                                              BackgroundColor="{StaticResource Primary}" TextColor="{StaticResource Secondary}"
                                             Placeholder="Interests (i.e. UFC, Fishing, Investing etc;)"
                                             PlaceholderColor="{StaticResource Secondary}"/>

                                </Frame >
                
                                <Frame IsClippedToBounds="true" Grid.Row="1" Grid.ColumnSpan="2"
                                     Padding="0"
                                     CornerRadius="15">
                                    <Editor  HeightRequest="140" x:Name="bioEntry" 
                                        BackgroundColor="{StaticResource Primary}" TextColor="{StaticResource Secondary}"
                                       Placeholder="Biography (A little information about yourself)"
                                       PlaceholderColor="{StaticResource Secondary}"/>
                                </Frame>
                        
                            </Grid>
                
                    </Grid>

            
                </ScrollView>
        
                
          
        </Grid>
    </ContentPage.Content>

Answer 1

解决此问题的方法是将我的iOS项目更新为较新版本。他们在更新中修复了它。