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; 
}