Xaml System.Reflection.targetingException:&x27;调用的目标已引发异常;在列表视图中放置SwipeView时

Xaml System.Reflection.targetingException:&x27;调用的目标已引发异常;在列表视图中放置SwipeView时,xaml,xamarin,xamarin.forms,Xaml,Xamarin,Xamarin.forms,我现在在Xamarin.Forms应用程序的编码中遇到问题。 我有一个带有StackLayout的列表视图(运行良好)。但当我看到SwipeView存在时,我更新到了Xamarin.Forms的最新版本(4.4.0.991640),并生成了以下xaml代码: <StackLayout Grid.Row="0" Grid.Column="2" Grid.RowSpan="2" BackgroundColor="LightGray"> <L

我现在在Xamarin.Forms应用程序的编码中遇到问题。 我有一个带有StackLayout的列表视图(运行良好)。但当我看到SwipeView存在时,我更新到了Xamarin.Forms的最新版本(4.4.0.991640),并生成了以下xaml代码:

 <StackLayout Grid.Row="0" Grid.Column="2" Grid.RowSpan="2" BackgroundColor="LightGray">
                    <ListView x:Name="ItemsListView"                   
                        ItemsSource="{Binding Items}"
                        VerticalOptions="FillAndExpand"
                        HasUnevenRows="true"
                        RefreshCommand="{Binding LoadItemsCommand}"
                        IsPullToRefreshEnabled="true"
                        IsRefreshing="{Binding IsBusy, Mode=OneWay}"
                        CachingStrategy="RecycleElement"
                        ItemSelected="OnItemSelected">
                        <ListView.ItemTemplate>
                            <DataTemplate>
                                <ViewCell>
                                    <SwipeView>
                                        <SwipeView.RightItems>
                                            <SwipeItems>
                                                <SwipeItem Text="Favorite"
                                                       BackgroundColor="LightGreen"
                                                       Invoked="OnModifySwipeItemInvoked" />
                                                <SwipeItem Text="Delete"
                                                       BackgroundColor="LightPink"
                                                       Invoked="OnDeleteSwipeItemInvoked" />
                                            </SwipeItems>
                                        </SwipeView.RightItems>
                                        <SwipeView.Content>
                                            <StackLayout Padding="10" BackgroundColor="{Binding ColorCode}">
                                                <Label Text="{Binding Type}" 
                                                d:Text="{Binding .}"
                                                LineBreakMode="NoWrap" 
                                                Style="{DynamicResource ListItemTextStyle}" 
                                                FontSize="Large" 
                                                HorizontalOptions="Center"/>

                                                <Label Text="{Binding Description}" 
                                                d:Text="Item descripton"
                                                LineBreakMode="NoWrap"
                                                Style="{DynamicResource ListItemDetailTextStyle}"
                                                FontSize="Medium"
                                                HorizontalOptions="Center"/>
                                            </StackLayout>
                                        </SwipeView.Content>
                                    </SwipeView>
                                </ViewCell>
                            </DataTemplate>
                        </ListView.ItemTemplate>
                    </ListView>
                </StackLayout>
没有尝试捕获可能,因为它发生在我返回页面时,我尝试了未处理的异常,但仍然没有获得更多信息

如果你需要更多的信息,请问我。 你能帮帮我吗?谢谢

System.Reflection.TargetInvocationException:“调用的目标已引发异常。”

SwipeView
在Xamarin.Forms 4.4中提供。但是,它目前是实验性的,在调用
Forms.Init之前,只能将以下代码行添加到iOS上的
AppDelegate
类、Android上的
MainActivity
类或UWP上的
App
类:

Forms.SetFlags("SwipeView_Experimental");
(如果否,将出现相同的错误。)

例如,在Android中:

public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
    protected override void OnCreate (Bundle bundle)
    {
        base.OnCreate (bundle);

        Forms.SetFlags("SwipeView_Experimental"); // Add here
        global::Xamarin.Forms.Forms.Init (this, bundle);

        LoadApplication (new App ());
    }
}
public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
{
    public override bool FinishedLaunching (UIApplication app, NSDictionary options)
    {
        Forms.SetFlags("SwipeView_Experimental"); // Add here
        global::Xamarin.Forms.Forms.Init ();

        LoadApplication (new App ());

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

public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
    protected override void OnCreate (Bundle bundle)
    {
        base.OnCreate (bundle);

        Forms.SetFlags("SwipeView_Experimental"); // Add here
        global::Xamarin.Forms.Forms.Init (this, bundle);

        LoadApplication (new App ());
    }
}
public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
{
    public override bool FinishedLaunching (UIApplication app, NSDictionary options)
    {
        Forms.SetFlags("SwipeView_Experimental"); // Add here
        global::Xamarin.Forms.Forms.Init ();

        LoadApplication (new App ());

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

如果想了解更多信息,您可以查看此

查看内部视图->输出以查找崩溃日志,您将找到实际应用程序崩溃的文件名行号及其原因。如果需要进一步帮助,请与他人分享,在该页面的InitializeComponent中添加一个try catch,以获取StackTrace,它将告诉您是哪行代码导致了此问题!