Debug Log

- (void)viewDidLoad
{
  ...
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(Log:) name:iOS2c2pLogNoti object:nil];
  ...
}

-(void)Log:(NSNotification*)notification
{
    NSLog(@"Current Payment Log : %@ ",notification.object);
}

override func viewDidLoad() {
    ...
  NotificationCenter.default.addObserver(self, selector: #selector(ViewController.log(notification:)), name: NSNotification.Name(rawValue: iOS2c2pLogNoti) , object: nil)
    ...
}

func log(notification :NSNotification) {
  print(notification)
}