NSDate 年 月 日 星期 毫秒数

//中国时区时间
[NSTimeZone setDefaultTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"GMT+0800"]];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
   
    NSLog(@"%@",[dateFormatter stringFromDate:date]);

//显示星期几
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
    [dateFormatter setLocale:[[NSLocale alloc]initWithLocaleIdentifier:@"zh_CN"]];
    dateFormatter.dateFormat = @"yyyy-MM-dd EEEE";

//得到当前的日期
NSDate *date = [NSDate date];
NSLog(@"date:%@",date);

//得到(24 * 60 * 60)即24小时之前的日期，dateWithTimeIntervalSinceNow:
NSDate *yesterday = [NSDate dateWithTimeIntervalSinceNow: -(24 * 60 * 60)];
NSLog(@"yesterday:%@",yesterday);


NSDateFormatter *formatter =[[[NSDateFormatter alloc] init] autorelease];
NSDate *date = [NSDate date];
[formatter setTimeStyle:NSDateFormatterMediumStyle];
NSCalendar *calendar = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease];
NSDateComponents *comps = [[[NSDateComponents alloc] init] autorelease];
NSInteger unitFlags = NSYearCalendarUnit |
                       NSMonthCalendarUnit |
                       NSDayCalendarUnit |
                       NSWeekdayCalendarUnit |
                       NSHourCalendarUnit |
                       NSMinuteCalendarUnit |
                       NSSecondCalendarUnit;
//int week=0;
comps = [calendar components:unitFlags fromDate:date];
int week = [comps weekday];
int year=[comps year];
int month = [comps month];
int day = [comps day];
//[formatter setDateStyle:NSDateFormatterMediumStyle];
//This sets the label with the updated time.
int hour = [comps hour];
int min = [comps minute];
int sec = [comps second];
NSLog(@"week%d",week);
NSLog(@"year%d",year);
NSLog(@"month%d",month);
NSLog(@"day%d",day);
NSLog(@"hour%d",hour);
NSLog(@"min%d",min);
NSLog(@"sec%d",sec);



//得到毫秒
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
[dateFormatter setTimeStyle:NSDateFormatterShortStyle];
//[dateFormatter setDateFormat:@"hh:mm:ss"]
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss.SSS"];
NSLog(@"Date%@", [dateFormatter stringFromDate:[NSDate date]]);
[dateFormatter release];

/**
*  取最近七天的时间
**/
- (void)receiveCurrentTime:(NSNotification*)notify
{
    NSDictionary *dic = [notify userInfo];
    NSDate *currentDate = [dic objectForKey:currentTimeResult];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
    [dateFormatter setLocale:[[NSLocale alloc]initWithLocaleIdentifier:@"zh_CN"]];
    dateFormatter.dateFormat = @"yyyy-MM-dd EEEE";
   
    NSMutableArray *dateslist = [[NSMutableArray alloc] init];
   
   
    for (int i = 0; i < 7; i++) {
        NSDate *newDate = [[NSDate alloc] initWithTimeIntervalSinceReferenceDate:([currentDate timeIntervalSinceReferenceDate] + 24*3600*i)];
        [dateslist addObject:newDate];
        NSString *str = [NSString stringWithFormat:@"%@", [dateFormatter stringFromDate:newDate]];
        [_dateList addObject:str];
    }
   
   
    NSString *defaultDateStr = [self transToSendDateString:currentDate];
    _requestSeat.dateStr = defaultDateStr;

    _dates = dateslist;
}