iOS Question Cancel single future local notification

[OliverA]

How does one cancel as single local notification that has been set for some time in the future? For example, I'm setting a "Time's up" notification system, where, depending on how long a task lasts, a user is reminded that at various periods on how much time is left. Currently I'm setting the notifications to 30, 20, 10, 5 and 0 minutes left. Now, lets say I set up a task that takes 1 hour to complete and set up the 5 remaining time notifications. Now I would like to cancel just the 30 minute reminder. How do I do that? I tried the notifications cancel method, but that does not do it. Then I tried cancelLocalNotification as detailed in a stackoverflow article, but that just blows up.

Sub btnCancelEvent_Click
    Dim callee As Button = Sender
    Log(callee.Text)

'    Dim bagdeNumber() As Int
'    For Each ln As Notification In App.GetScheduledNotifications
'        bagdeNumber = callee.Tag
'        If ln.IconBadgeNumber = bagdeNumber(0) Then
'            ln.Cancel        
'        End If
'    Next
    For x = 0 To buttons.Length - 2
        If callee = buttons(x) Then
            Log("found button")
            callee.Enabled = False
            Dim ln As Notification = alerts(x)
            If x Mod 2 = 1 Then
                ln.Cancel ' Does not cancel notification
                'ln.Register ' OK. I got desperate here
            Else
                Dim no1 As NativeObject = App
                Dim no2 As NativeObject = ln
                no1.RunMethod("cancelLocalNotification", Array (no2)) ' blows up!!!!!
                'Method not found: cancelLocalNotification, target: <UIApplication: 0x133904800>
            End If
            
            Exit
        End If
    Next
    updateUI
End Sub

P.S.: Attaching project

Link(s):
Stackoverflow: https://stackoverflow.com/questions/6340664/delete-a-particular-local-notification

 

[Erel]

Use UserNotificationCenter: https://www.b4x.com/android/forum/threads/usernotificationcenter-class.117925/
There is a remove notification method.