当Android没有这个问题时，如何修复Xamarin.Forms iOS在标题栏图像和标题栏背景上的色差

我有一张背景色为F6D401的图像（大小与横幅一样），需要转到TopBar进行品牌宣传

在App.xaml I set中：

<Application.Resources>    
    <ResourceDictionary>    
        <Color x:Key="Primary">#f6d401</Color>    
        <Color x:Key="TextColor">#5a5a5a</Color> 

然而，在iOS上，颜色似乎不匹配


我假设iOS上有一个默认设置，需要更改

如何使横幅和图标颜色匹配？
请添加
UINavigationBar.Appearance.Translucent=false至
AppDelegate.cs

 public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
    {
        //
        // This method is invoked when the application has loaded and is ready to run. In this 
        // method you should instantiate the window, load the UI into it and then make the window
        // visible.
        //
        // You have 17 seconds to return from this method, or iOS will terminate your application.
        //
       
        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
            UINavigationBar.Appearance.Translucent = false;
            global::Xamarin.Forms.Forms.Init();
            LoadApplication(new App());

            return base.FinishedLaunching(app, options);
        }
    }

下面是跑步截图


    <Shell.TitleView>
    <Image
           HorizontalOptions="Center"
           VerticalOptions="Center" 
        Source="logo.png"  />
</Shell.TitleView>

 public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
    {
        //
        // This method is invoked when the application has loaded and is ready to run. In this 
        // method you should instantiate the window, load the UI into it and then make the window
        // visible.
        //
        // You have 17 seconds to return from this method, or iOS will terminate your application.
        //
       
        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
            UINavigationBar.Appearance.Translucent = false;
            global::Xamarin.Forms.Forms.Init();
            LoadApplication(new App());

            return base.FinishedLaunching(app, options);
        }
    }