push notification xamarin

app delegate

public override bool FinishedLaunching(UIApplication application, NSDictionary launchOptions)
        {   
            // do some stuff
            
            // check if launched by push tap
            if (launchOptions != null && launchOptions[UIApplication.LaunchOptionsRemoteNotificationKey] != null)
            {
                // re-using remote notification logic here for when app loads after user 
                // has interacted with remote notification from tray
                this.DidReceiveRemoteNotification(application, launchOptions, (UIBackgroundFetchResult result) =>
                {
                    // do nothing after handled by DidReceiveRemoteNotification
                });
        
            }  
       
       
       // etc....
        }
        
        
        // etc...
        
        
        public override void DidReceiveRemoteNotification(UIApplication application, NSDictionary userInfo, System.Action<UIBackgroundFetchResult> completionHandler)
        {
            base.DidReceiveRemoteNotification(application, userInfo, completionHandler);

           

            var sitataCtrl = STASDKController.SharedInstance;
            sitataCtrl.ReceivePushNotification(userInfo, completionHandler);



            if (application.ApplicationState == UIApplicationState.Active)
            {
                // app is currently active, can update badges or visuals here

            }
            else if (application.ApplicationState == UIApplicationState.Background)
            {
                // app is in background

            }
            else if (application.ApplicationState == UIApplicationState.Inactive)
            {
                // app is transitioning from background to foreground (user taps notification)

                // launch the screen for a particular push notification (when applicable)
                sitataCtrl.LaunchPushNotificationScreen(userInfo);
            }
        }