Determine English Ordinal Suffix from NSDate

SuffxCode.m

// Omar Zouai | https://omarzouai.com/
-(NSString*) suffixForDate:(NSDate*) date {
    NSDateFormatter *monthDayFormatter = [[NSDateFormatter alloc] init];
    [monthDayFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
    [monthDayFormatter setDateFormat:@"d"];
    int date_day = [[monthDayFormatter stringFromDate:date] intValue];
    NSString *suffix = @"th";
    if(date_day <=10 || date_day >=20) {
        int singleDay = (date_day%10);
        if(singleDay == 1) suffix = @"st";
        if(singleDay == 2) suffix = @"nd";
        if(singleDay == 3) suffix = @"rd";
    }
    return suffix;
}