BEMUTATÓRA kész.

src/WorkFlowCheck.MAUI/Pages/NFC/NFCWaiter.xaml.cs

@@ -36,6 +36,11 @@ public partial class NFCWaiter : ContentPage
         }
 
     }
+    protected override void OnDisappearing()
+    {
+        base.OnDisappearing();
+    }
+
     async Task AutoStartAsync()
     {
         // Some delay to prevent Java.Lang.IllegalStateException "Foreground dispatch can only be enabled when your activity is resumed" on Android
@@ -47,6 +52,7 @@ public partial class NFCWaiter : ContentPage
 
         await BeginListening();
     }
+    
     async Task BeginListening()
     {
         try
@@ -62,16 +68,14 @@ public partial class NFCWaiter : ContentPage
             //await ShowAlert(ex.Message);
         }
     }
-    async Task EndListening()
+    async Task StopListening()
     {
         try
         {
             MainThread.BeginInvokeOnMainThread(() =>
             {
-                UnsubscribeEvents();
-                CrossNFC.Current.StopPublishing();
                 CrossNFC.Current.StopListening();
-
+                UnsubscribeEvents();
             });
         }
         catch (Exception ex)
@@ -79,6 +83,7 @@ public partial class NFCWaiter : ContentPage
             //await ShowAlert(ex.Message);
         }
     }
+    
     void SubscribeEvents()
     {
         if (_eventsAlreadySubscribed)
@@ -86,18 +91,21 @@ public partial class NFCWaiter : ContentPage
 
         _eventsAlreadySubscribed = true;
 
-        CrossNFC.Current.OnMessageReceived += Current_OnMessageReceived_NFCData;
+        CrossNFC.Current.OnMessageReceived += OnMessageReceived_NFCData;
 
 
     }
     void UnsubscribeEvents()
     {
-        CrossNFC.Current.OnMessageReceived -= Current_OnMessageReceived_NFCData;
+        CrossNFC.Current.OnMessageReceived -= OnMessageReceived_NFCData;
         _eventsAlreadySubscribed = false;
     }
-    async void Current_OnMessageReceived_NFCData(ITagInfo tagInfo)
+    async void OnMessageReceived_NFCData(ITagInfo tagInfo)
     {
         _onReceiveing = true;
+        
+        
+
         if (tagInfo == null)
         {
             await ShowAlert("No tag found");
@@ -109,9 +117,16 @@ public partial class NFCWaiter : ContentPage
         var identifier = tagInfo.Identifier;
         var serialNumber = NFCUtils.ByteArrayToHexString(identifier, ":");
         _taskCompletionSource.TrySetResult(serialNumber);
-        await EndListening();
-        await Navigation.PopAsync();
         _onReceiveing = false;
+
+        await Task.Delay(500);
+        await StopListening();    
+       
+        await MainThread.InvokeOnMainThreadAsync(async () =>
+        {
+            await Navigation.PopModalAsync();
+            //await Navigation.PopModalAsync();
+        });
     }
     Task ShowAlert(string message, string title = null) => DisplayAlert(string.IsNullOrWhiteSpace(title) ? "NFC olvasás" : title, message, "OK");
 }