FreshMVVM导航在离开模式页时抛出异常

Question

我正在使用一个LocalNotification插件(Nuget)生成一个电话通知事件，这是很好的工作。如果用户导航到一个列出通知并选择通知的页面，它将转到NotificationPageModel.cs页面。从那里，他们按一个按钮，导航他们离开，这工作，只要它是手动导航到。

如果用户单击电话的通知(app.xaml.cs:OnLocalNotificationTapped)，那么当尝试导航时，它会生成一个FreshTinyIoC.TinyIoCResolutionException。

当用户单击通知(masterDetailNav.Navigation.PushModalAsync(npage);)时，如何从页面导航？

相关版本: Thudugala v4.0.5的Xamarin.Forms v3.6.0.264807 FreshMvvm v3.0.0 Plugin.LocalNotification

App.xaml.cs

void OnLocalNotificationTapped(NotificationTappedEventArgs e)
{
    var _logger = FreshMvvm.FreshIOC.Container.Resolve<ILoggingService>();
    _logger.Info("Pressed notification: {0}", e.Data);
    Notification notification = new Notification();
    if (string.IsNullOrWhiteSpace(e.Data))
    {
        return;
    }
    else
    {
        notification = JsonConvert.DeserializeObject<Notification>(e.Data);
    }

    //CoreMethods.PushPageModel<NotificationPageModel>(notification); //cant find coremethods
    var npage = FreshPageModelResolver.ResolvePageModel<NotificationPageModel>(notification);
    masterDetailNav.Navigation.PushModalAsync(npage);
}

NotificationPageModel.cs：

public async void Cancel()
{
    _logger.Info("Notification {0} Cancel: {1}", Notification.Gateway, Notification.TimeStamp);

    //Navigate away from page
    //await CoreMethods.PopPageModel(); //this only works if manually navigated to
    //attempt #1
    await CoreMethods.PushPageModel<HomePageModel>();
}

public async void Remove()
{
    _logger.Info("Notification {0} Remove: {1}", Notification.Gateway, Notification.TimeStamp);

    //Remove notification
    try
    {
        _user.Notifications.Remove(Notification);
    }
    catch (Exception ex)
    {
        _logger.Warn("Remove Notification: {0}", ex.Message);
    }

    //Navigate away from page
    //await CoreMethods.PopPageModel(); //this only works if manually navigated to
    //attempt #2
    var hpage = FreshPageModelResolver.ResolvePageModel<HomePageModel>();
    await CoreMethods.PushPageModelWithNewNavigation<HomePageModel>(hpage);
}

斯塔克迹

FreshTinyIoC.FreshTinyIoCContainer.ResolveInternal (FreshTinyIoC.FreshTinyIoCContainer+TypeRegistration注册，FreshTinyIoC.NamedParameterOverloads参数，FreshTinyIoC.ResolveOptions选项) 0x000f7 in C:\Projects\FreshMvvm\src\FreshIOC\FreshTinyIOC.cs:3142 at FreshTinyIoC.FreshTinyIoCContainer.Resolve (System.Type resolveType，( C:\Projects\FreshMvvm\src\FreshIOC\FreshTinyIOC.cs:1211 at FreshTinyIoC.FreshTinyIoCContainer.ResolveResolveType 0x00000 in C:\Projects\FreshMvvm\src\FreshIOC\FreshTinyIOC.cs:1332 at FreshMvvm.FreshTinyIOCBuiltIn.ResolveResolveType 0x00000 in C:\Projects\FreshMvvm\src\FreshMvvm\FreshTinyIOCBuiltIn.cs:31 at FreshMvvm.PageModelCoreMethods.PushNewNavigationServiceModal (FreshMvvm.IFreshNavigationService newNavigationService，FreshMvvm.FreshBasePageModel[] basePageModels，( C:\Projects\FreshMvvm\src\FreshMvvm\PageModelCoreMethods.cs:178 ) 0x00073 in FreshMvvm.PageModelCoreMethods.PushPageModelWithNewNavigationT 0x00060 in C:\Projects\FreshMvvm\src\FreshMvvm\PageModelCoreMethods.cs:235 at cdaxrobot.PageModels.NotificationPageModel.Go () 0x00225 in C:\Work\RobotApp\App\cdaxrobot\cdaxrobot\cdaxrobot\PageModels\NotificationPageModel.cs:113 at System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.b__7_0 (System.Object state) 0x00000 in /Users/builder/jenkins/workspace/archive-mono/2019-08/android/release/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/AsyncMethodBuilder.cs:1021 at Android.App.SyncContext+<>c__DisplayClass2_0.b__0 () 0x00000 in <11f101b564894ca7af6c482ddc51c698>:0 at Java.Lang.Thread+RunnableImplementor.Run () 0x00008 in <11f101b564894ca7af6c482ddc51c698>:0 at Java.Lang.IRunnableInvoker.n_Run (System.IntPtr jnienv，(包装动态方法) Android.Runtime.DynamicMethodNameCounter.41(intptr，intptr)中的System.IntPtr native__this) 0x00009

Answer 1

谢谢你的回应。我通过创建一个新的NavigationContainer来修复它：

notificationPage = FreshMvvm.FreshPageModelResolver.ResolvePageModel<NotificationPageModel>(true);
notificationContainer = new FreshNavigationContainer(notificationPage, Models.Constants.NotificationContainer);

void OnLocalNotificationTapped(NotificationTappedEventArgs e)
{
    MainPage = notificationContainer;
}

然后在这一页里我做了这样的事情：

if (CameFromNotification == true)
{
    _logger.Debug("Navigating back to MainContainer");
    CoreMethods.SwitchOutRootNavigation(Models.Constants.MainContainer);
}
else
{
    _logger.Debug("Navigating by popping the stack");
    await CoreMethods.PopPageModel();
}