Prism Xamarin.Forms EventToCommandBehavior使应用程序崩溃

我正试图在ListView中的Xamarin.Forms中使用prism命令，但一旦引入ListView.Behaviors，应用程序就会崩溃，产生错误。不幸的是，App1.Droid已经停止

该应用程序是一个非常小的演示程序，仅用于在Prism中测试命令。没有ListView.Behaviors，页面工作正常

XAML代码如下所示

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:prism="clr-namespace:Prism.Mvvm;assembly=Prism.Forms"
             prism:ViewModelLocator.AutowireViewModel="True"
             x:Class="Intro.Views.Example03"
             xmlns:b="clr-namespace:Prism.Behaviors;assembly=Prism.Forms"
             Title="{Binding Title}">
  <ListView ItemsSource="{Binding ContactList}">
    <ListView.Behaviors>
      <b:EventToCommandBehavior EventName="ItemTapped" Command="{Binding ItemTappedCommand}" />
    </ListView.Behaviors>
    <ListView.ItemTemplate>
      <DataTemplate>
        <ViewCell>
          <StackLayout Orientation="Horizontal">
            <Label Text="{Binding Id}" HorizontalOptions="Center" VerticalOptions="Center" FontSize="Large" />
            <StackLayout Orientation="Vertical">
              <Label Text="{Binding FirstName}" HorizontalOptions="FillAndExpand" />
              <Label Text="{Binding LastName}" HorizontalOptions="FillAndExpand" />
              <Label Text="{Binding Email}" HorizontalOptions="FillAndExpand" />
            </StackLayout>
          </StackLayout>
        </ViewCell>
      </DataTemplate>
    </ListView.ItemTemplate>
  </ListView>
</ContentPage>

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我做错了什么？

EventToCommandBehavior在6.2上不可用。它将在下一个预览版本中提供。现在，您应该查看最新的6.3预览版

---

您是否尝试改用DelegateCommand？是的，我尝试过，但结果相同您使用的是什么版本的Prism？我使用的是6.2.0包Prism.Forms，Prism.Unity.Forms，Prism.Core

public class Example03ViewModel : BindableBase, INavigationAware
{
    public ICommand ItemTappedCommand
    {
        get { return _itemTappedCommand; }
        set { SetProperty(ref _itemTappedCommand, value); }
    }

    private ICommand _itemTappedCommand;

    public Example03ViewModel()
    {
        _itemTappedCommand = new Command(ShowDetails);
    }

    private void ShowDetails(object obj)
    {
    }
}