Day of Week 게산하기

iphone에서 NSDate를 입력하고 그날의 요일을 얻어 오는 간단한 프로그램.

// return DayofWeek with indate of offset

-(NSString *)findDayofWeek:(NSDate*)inDate offsetDays:(NSInteger)offs{

    NSDate *calDate = [[NSDate alloc] initWithTimeInterval:(offs*60*60*24) sinceDate:inDate];

    NSLog(@"calDate = %@",calDate);

    

    NSDateFormatter *df = [[[NSDateFormatter alloc] init] autorelease];

    [df setDateFormat:@"yyyy-MM-dd HH:mm:ss zzzz"];

    [df setTimeZone:[NSTimeZone timeZoneWithName:@"GMT"]];

    [df setDateFormat:@"EEEE"];

    [df setLocale:[[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"] autorelease]];

    NSString *dayofweek = [[df stringFromDate:calDate] substringToIndex:2];

    

    NSLog(@"%@", dayofweek);

    

    return [dayofweek uppercaseString];

}

 
흐~ 생각보다 쉽넹~