Removing an event from iCal does not work when iCal is not in the background

I am trying to remove an event from iCal as soon as I receive a notification. The event is cleared only if iCal is in the background. If the same notification is sent after iCal is closed, the event is not deleted. I am trying to access iCal using this method in MyCalendar.m

+ (void)requestAccess:(void (^)(BOOL granted, NSError *error))callback {
  if (eventStore == nil) {
    eventStore = [[EKEventStore alloc] init];
  }
  [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:callback];
}

      

        
        
        
      

    

And trying to remove the event using the following method in Appdelegate.m

[MyCalendar requestAccess:^(BOOL granted, NSError *error) {
            if (granted) {
                if ([[self.launchOptions objectForKey:@"type"] isEqualToString:@"remainder"] || [[self.launchOptions objectForKey:@"type"] isEqualToString:@"cancelAppointment"]) {
                    if ([[self.launchOptions objectForKey:@"type"]
                         isEqualToString:@"cancelAppointment"]) {
                        if (![MyCalendar removeEventWithEventIdentifier:
                              [self.launchOptions objectForKey:@"eventId"]]) {
                        }
                    }
                }
            }
       }];

      

        
        
        
      

    

Removes an event from iCal using the following method in MyCalendar.m

+ (BOOL)removeEventWithEventIdentifier:(NSString *)identifier {
  EKEvent *event2 = [eventStore eventWithIdentifier:identifier];
  BOOL result = NO;
  if (event2 != nil) {
    NSError *error = nil;
    result = [eventStore removeEvent:event2 span:EKSpanThisEvent error:&error];
  }
  return result;
}

      

        
        
        
      

    

Thanks in advance!