我目前正在.NET 8中的Maui项目上工作，但我在CollectionView中使用的TapGestureRecognizer遇到了麻烦。
我的XAML代码：

<ContentPage.BindingContext>
    <viewmodel:SearchLoadingListVM />
</ContentPage.BindingContext>

<Page.Behaviors>
    <ctk:StatusBarBehavior StatusBarColor="#005ea8" StatusBarStyle="LightContent" />
</Page.Behaviors>

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="40*" />
        <RowDefinition Height="60*" />
    </Grid.RowDefinitions>

    <VerticalStackLayout Grid.Row="0"
                         Grid.RowSpan="2"
                         Margin="0,30,0,0">

        <Image Source="deliveryboximage.png"
               HeightRequest="150" />

        <HorizontalStackLayout HorizontalOptions="Center">
            <Entry BackgroundColor="White"
                   HeightRequest="40"
                   WidthRequest="280"
                   MaxLength="10"
                   TextTransform="Uppercase"
                   Placeholder="Auftragsnummer"
                   HorizontalTextAlignment="Start"
                   Margin="0,0,-80,0"
                   IsEnabled="{Binding IsEntryEnabled}"
                   Text="{Binding EntryTextValue}"
                   TextColor="Black" />

            <ImageButton Source="barcode_scanner.svg"
                         Scale="0.7"
                         Margin="0,0,0,7"
                         Command="{Binding ScanBarCodeCommand}" />

            <ImageButton Source="search.svg"
                         Scale="0.7"
                         Margin="-5,0,0,7"
                         Command="{Binding ExecuteSearchCommand}" />

        </HorizontalStackLayout>

    </VerticalStackLayout>
    <ScrollView IsEnabled="{Binding IsScrollViewEnabled}"
                Grid.Row="1">
        <CollectionView
            ItemsSource="{Binding LoadingListCollection}"
            HorizontalOptions="Center"
            SelectionMode="None">
            <CollectionView.ItemTemplate>
                <DataTemplate x:DataType="{x:Type x:String}">
                    <Grid Padding="2">
                        <Frame BorderColor="LightGray">
                            <Frame.GestureRecognizers>
                                <TapGestureRecognizer Command="{Binding Source={RelativeSource AncestorType={x:Type viewmodel:SearchLoadingListVM}}, Path=ItemTapedCommand}"
                                                      CommandParameter="{Binding .}" />
                            </Frame.GestureRecognizers>
                            <HorizontalStackLayout>
                                <Label Text="{Binding .}"
                                       FontSize="22"
                                       TextColor="Black" />

                            </HorizontalStackLayout>
                        </Frame>
                    </Grid>
                </DataTemplate>
            </CollectionView.ItemTemplate>
        </CollectionView>
    </ScrollView>
</Grid>

字符串
MVVM Community Toolkit生成的代码：

partial class SearchLoadingListVM
{
    /// <summary>The backing field for <see cref="ItemTapedCommand"/>.</summary>
    [global::System.CodeDom.Compiler.GeneratedCode("CommunityToolkit.Mvvm.SourceGenerators.RelayCommandGenerator", "8.2.0.0")]
    private global::CommunityToolkit.Mvvm.Input.AsyncRelayCommand<string>? itemTapedCommand;
    /// <summary>Gets an <see cref="global::CommunityToolkit.Mvvm.Input.IAsyncRelayCommand{T}"/> instance wrapping <see cref="ItemTaped"/>.</summary>
    [global::System.CodeDom.Compiler.GeneratedCode("CommunityToolkit.Mvvm.SourceGenerators.RelayCommandGenerator", "8.2.0.0")]
    [global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
    public global::CommunityToolkit.Mvvm.Input.IAsyncRelayCommand<string> ItemTapedCommand => itemTapedCommand ??= new global::CommunityToolkit.Mvvm.Input.AsyncRelayCommand<string>(new global::System.Func<string, global::System.Threading.Tasks.Task>(ItemTaped));
}

型
VM（ItemTaped（）应该被调用）：

public partial class SearchLoadingListVM : ObservableObject

{
    [ObservableProperty]
    private ObservableCollection<string> loadingListCollection;

    [ObservableProperty]
    private string entryTextValue;

    [ObservableProperty]
    private bool isEntryEnabled = true;

    [ObservableProperty]
    private bool isScrollViewEnabled;

    private WebService.WebService webService;

    public SearchLoadingListVM()
    {
        CheckPermission();

        loadingListCollection = new ObservableCollection<string>();
        webService = new WebService.WebService();
    }

    [RelayCommand]
    public async void ScanBarCode()
    {
        IsEntryEnabled = false;
        await Shell.Current.GoToAsync( nameof( CodeScannerView ) );
        IsEntryEnabled = true;
    }

    [RelayCommand]
    public async void ExecuteSearch()
    {
        if( !string.IsNullOrEmpty( EntryTextValue ) )
        {
            IsEntryEnabled = false;
            await Shell.Current.Navigation.PushModalAsync( new BusyIndicationModal() );
            LoadingListCollection = await webService.GetLoadingListsAsync( EntryTextValue );
            if( LoadingListCollection.Count == 0 )
            {
                
            }

            await Shell.Current.Navigation.PopModalAsync();
            IsEntryEnabled = true;
        }
    }

    [RelayCommand]
    async Task ItemTaped( string item )
    {
        await Shell.Current.Navigation.PushAsync( new CameraView() );
    }

    async Task CheckPermission()
    {
        PermissionStatus status = await Permissions.CheckStatusAsync<Permissions.Camera>();

        if( status != PermissionStatus.Granted )
        {
            status = await Permissions.RequestAsync<Permissions.Camera>();
        }
    }

型
我确实从James Montemagno的视频中复制了XAML代码和this问题的答案。
有趣的是，它以前确实工作过，但在最后一次Visual Studio更新之后，我的整个解决方案崩溃了，甚至在恢复了一些以前使用的代码之后，它也没有工作。
当我在上面看到的两个方法上设置断点时，工作室不会在任何一个方法上中断。还有一些其他的RelayCommands实现，它们都工作正常，所以我猜问题是我的XAML？
有谁知道我是否遗漏了什么或者为什么它不起作用？
在此先谢谢您！