Adding UILocationNotification when the countdown reach 0

Hi, I have built an app the countdown for date for releasing games, I need to be able to notify users when the games are released via local notification.

I have done this but it seems not working

    UIApplication * app = [UIApplication sharedApplication];
    UILocalNotification * notification = [[UILocalNotification alloc]init];
    if (notification) {
        notification.fireDate = endingDate;
        notification.timeZone = [NSTimeZone defaultTimeZone];
        notification.alertBody = [NSString stringWithFormat:@"%@ has been released ",currentGame.gameName];
        [app scheduledLocalNotifications];
    }

here is my countdown method :

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"YYYY-MM-dd"];
    NSDate *startingDate = [NSDate date];
    NSDate *endingDate = [dateFormatter dateFromString:[NSString stringWithFormat:@"%@", currentGame.gameDate]];
    NSUInteger unitFlags = NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitMinute|NSCalendarUnitSecond;
    NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    NSDateComponents *componentsDaysDiff = [gregorianCalendar components:unitFlags
                                                                fromDate:startingDate
                                                                  toDate:endingDate
                                                                 options:0];
   
    NSString *countdownText = [NSString stringWithFormat:@"%ld Months %ld Days %ld Minutes %ld Seconds", (long)componentsDaysDiff.month, (long)componentsDaysDiff.day, (long)componentsDaysDiff.minute, (long)componentsDaysDiff.second];
    if ((long)componentsDaysDiff.month <= 0 && (long)componentsDaysDiff.day <= 0 && (long)componentsDaysDiff.minute <= 0 && (long)componentsDaysDiff.second <= 0 ) {
        gamesCountdownLabel.text = @"Released";
    }else{
    gamesCountdownLabel.text = countdownText;
    }
    [gamesCountdownLabel.layer setCornerRadius:15.0f];
    [gamesCountdownLabel.layer setMasksToBounds:YES];
    [gamesCountdownLabel.layer setShadowRadius:5.0f];
    [gamesCountdownLabel.layer setShadowOffset:CGSizeMake(1.0f, 2.0f)];