C# 移除shell操作栏下的阴影Xamarin Forms Android

我很难找到解决方案，甚至文档站点上声明的属性也不起作用。这是文档中的示例：

<ContentPage ...
             Shell.NavBarHasShadow="true">
    ...
</ContentPage>

...

当我尝试将属性添加到ContentPage时，它返回一个错误

严重性代码说明项目文件行抑制状态 错误XLS0415在中找不到可附加属性“Hassadow” 键入“Shell”。LoanApp2 LoanHistory.xaml 8

这是my MainPage.xaml：

<?xml version="1.0" encoding="utf-8" ?>
<Shell xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:local="clr-namespace:LoanApp2.Views"
             mc:Ignorable="d"
             x:Class="LoanApp2.MainPage" BackgroundColor="#62bef0" Title="Dylan Villaruel">

    <FlyoutItem Title="MyTabApp" Shell.TabBarIsVisible="False" FlyoutDisplayOptions="AsMultipleItems">
        <ShellContent Title="Loan History" IsTabStop="True" ContentTemplate="{DataTemplate local:LoanHistory}"/>
        <ShellContent Title="Amount Loanable" IsTabStop="True" ContentTemplate="{DataTemplate local:AmountLoanable}"/>
    </FlyoutItem>

</Shell>

外壳内容都被ContentPage包装为根标记

@e700867

您需要创建自定义渲染器以从shell中的导航中移除阴影，希望下面的代码能够帮助您：

public class CustomShellRenderer : ShellRenderer
{
    public CustomShellRenderer(Context context) : base(context)
    {
    }

    protected override IShellToolbarAppearanceTracker CreateToolbarAppearanceTracker()
    {
        return new CustomShellToolbarAppearanceTracker(this);
    }
}

internal class CustomShellToolbarAppearanceTracker : IShellToolbarAppearanceTracker
{
    private CustomShellRenderer customShellRenderer;

    public CustomShellToolbarAppearanceTracker(CustomShellRenderer customShellRenderer)
    {
        this.customShellRenderer = customShellRenderer;
    }

    public void Dispose()
    {

    }

    public void ResetAppearance(Toolbar toolbar, IShellToolbarTracker toolbarTracker)
    {

    }

    public void SetAppearance(Toolbar toolbar, IShellToolbarTracker toolbarTracker, ShellAppearance appearance)
    {

        toolbar.SetBackgroundColor(Android.Graphics.Color.Green);
        var viewParent = (Android.Support.Design.Widget.AppBarLayout)toolbar.Parent;            
        viewParent.SetElevation(0.0f);
    }
}

谢谢

@e700867

您需要创建自定义渲染器以从shell中的导航中移除阴影，希望下面的代码能够帮助您：

public class CustomShellRenderer : ShellRenderer
{
    public CustomShellRenderer(Context context) : base(context)
    {
    }

    protected override IShellToolbarAppearanceTracker CreateToolbarAppearanceTracker()
    {
        return new CustomShellToolbarAppearanceTracker(this);
    }
}

internal class CustomShellToolbarAppearanceTracker : IShellToolbarAppearanceTracker
{
    private CustomShellRenderer customShellRenderer;

    public CustomShellToolbarAppearanceTracker(CustomShellRenderer customShellRenderer)
    {
        this.customShellRenderer = customShellRenderer;
    }

    public void Dispose()
    {

    }

    public void ResetAppearance(Toolbar toolbar, IShellToolbarTracker toolbarTracker)
    {

    }

    public void SetAppearance(Toolbar toolbar, IShellToolbarTracker toolbarTracker, ShellAppearance appearance)
    {

        toolbar.SetBackgroundColor(Android.Graphics.Color.Green);
        var viewParent = (Android.Support.Design.Widget.AppBarLayout)toolbar.Parent;            
        viewParent.SetElevation(0.0f);
    }
}

---

谢谢

您可以在页面的代码隐藏中添加Shell.setNavBarHassadow（此，false）。例如：

[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class HomeView : ContentPage
{
    public HomeView()
    {
        InitializeComponent();

        Shell.SetNavBarHasShadow(this, false);
    }
}

---

您可以在页面的codebehind中添加Shell.setNavBarHassadow（此，false）。例如：

[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class HomeView : ContentPage
{
    public HomeView()
    {
        InitializeComponent();

        Shell.SetNavBarHasShadow(this, false);
    }
}

---

我可以在Shell项目中添加for Shell.navbarhassadow=“true”，请检查您的Xamarin.Forms版本，我的版本是4.4.0。991265@CherryBu-MSFT如何检查Xamarin.Forms版本？它在我的about页面上看不到Xamarin.Forms，只有另一个Xamarin和Xamarin。*没关系，您实际上在visual studio的about部分看不到该版本。您必须检查nuget包管理器。我说我可以为Shell.navbarhassadow=“true”添加版本4.3I。在Shell项目中，请检查您的Xamarin.Forms版本，我的版本是4.4.0。991265@CherryBu-MSFT如何检查Xamarin.Forms版本？它在我的about页面上看不到Xamarin.Forms，只有另一个Xamarin和Xamarin。*没关系，您实际上在visual studio的about部分看不到该版本。您必须检查nuget包管理器。我的版本是4.3