iOS - 获取当前时间日期星期几

//获取当前时间日期星期
- (NSString *)getCurrentTimeAndWeekDay {

    NSArray * arrWeek=[NSArray arrayWithObjects:@"星期日",@"星期一",@"星期二",@"星期三",@"星期四",@"星期五",@"星期六", nil];
    NSDate *date = [NSDate date];
    /*
     NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
     */
    //ios 8.0 之后 不想看见警告用下面这个
    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    NSDateComponents *comps = [[NSDateComponents alloc] init];
    /*
     NSInteger unitFlags = NSYearCalendarUnit |
     NSMonthCalendarUnit |
     NSDayCalendarUnit |
     NSWeekdayCalendarUnit |
     NSHourCalendarUnit |
     NSMinuteCalendarUnit |
     NSSecondCalendarUnit;
     */
    //ios 8.0 之后 不想看见警告用下面这个
    NSInteger unitFlags = NSCalendarUnitYear |NSCalendarUnitMonth | NSCalendarUnitDay |NSCalendarUnitWeekday | NSCalendarUnitHour |NSCalendarUnitMinute |NSCalendarUnitSecond;
    comps = [calendar components:unitFlags fromDate:date];
    int week = [comps weekday];
    int year=[comps year];
    int month = [comps month];
    int day = [comps day];
    return   [NSString stringWithFormat:@"%d-%d-%d  %@",year,month,day,[arrWeek objectAtIndex:week]];
}