Xamarinフォームのローカル通知のためのFoundation.ModelNotImplementedException

Question

私はPCLプロジェクトを持っており、（タスクが単純な文字列を表示し終えたら）簡単な通知を表示する必要があります。

Window.RootViewController.PresentViewController(okayAlertController, true, null); 

例外がスローされます：Foundation.ModelNotImplementedException：型「Foundation.ModelNotImplementedException」の例外がスローされたiOSのプロジェクトでは、私はとReceivedLocalNotificationで通知を表示しようとします。

public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate 
{ 
    public override bool FinishedLaunching(UIApplication app, NSDictionary options) 
    { 
     ZXing.Net.Mobile.Forms.iOS.Platform.Init(); 
     global::Xamarin.Forms.Forms.Init(); 
     LoadApplication(new App()); 

     if (UIDevice.CurrentDevice.CheckSystemVersion(8, 0)) 
     { 
      var notificationSettings = UIUserNotificationSettings.GetSettingsForTypes(
       UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound, null 
      ); 

      app.RegisterUserNotificationSettings(notificationSettings); 

      // check for a notification 
      if (options != null) 
      { 
       // check for a local notification 
       if (options.ContainsKey(UIApplication.LaunchOptionsLocalNotificationKey)) 
       { 
        var localNotification = options[UIApplication.LaunchOptionsLocalNotificationKey] as UILocalNotification; 
        if (localNotification != null) 
        { 
         UIAlertController okayAlertController = UIAlertController.Create(localNotification.AlertAction, localNotification.AlertBody, UIAlertControllerStyle.Alert); 
         okayAlertController.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null)); 

         Window.RootViewController.PresentViewController(okayAlertController, true, null); 

         UIApplication.SharedApplication.ApplicationIconBadgeNumber = 0; 
        } 
       } 
      } 

     } 

     base.FinishedLaunching(app, options); 
    } 

    public override void ReceivedLocalNotification(UIApplication application, UILocalNotification notification) 
    { 
     // show an alert 
     UIAlertController okayAlertController = UIAlertController.Create(notification.AlertAction, notification.AlertBody, UIAlertControllerStyle.Alert); 
     okayAlertController.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null)); 

     Window.RootViewController.PresentViewController(okayAlertController, true, null); 

     UIApplication.SharedApplication.ApplicationIconBadgeNumber = 0; 
    } 
} 

そしてNotificationService_iOS.cs：ここでは、コードです

public class NotificationService_iOS : INotificationService 
{ 
    public void Notify(string title, string text) 
    { 
     var notification = new UILocalNotification(); 
     notification.FireDate = NSDate.FromTimeIntervalSinceNow(0); // Fire now 
     notification.AlertAction = title; 
     notification.AlertBody = text; 
     notification.ApplicationIconBadgeNumber = 1; 
     notification.SoundName = UILocalNotification.DefaultSoundName; 
     UIApplication.SharedApplication.ScheduleLocalNotification(notification); 
    } 
} 

Answer 1

ウィンドウオブジェクトは、あなたが

var window = UIApplication.SharedApplication.KeyWindow;

がここ problem with Window object

答えを見る使用する必要は使用できません。