获取星期，日期，月份

//获取日期
    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] autorelease]; 
    NSDateComponents *comps = [[[NSDateComponents alloc] init] autorelease]; 
    NSInteger unitFlags = NSYearCalendarUnit | 
    NSMonthCalendarUnit | 
    NSDayCalendarUnit | 
    NSWeekdayCalendarUnit | 
    NSHourCalendarUnit | 
    NSMinuteCalendarUnit | 
    NSSecondCalendarUnit; 
    comps = [calendar components:unitFlags fromDate:date]; 
    int week = [comps weekday]; 
    int year=[comps year]; 
    int month = [comps month]; 
    int day = [comps day]; 
    m_labDate.text=[NSString stringWithFormat:@"%d年%d月",year,month];
    m_labToday.text=[NSString stringWithFormat:@"%d",day];
    m_labWeek.text=[NSString stringWithFormat:@"%@",[arrWeek objectAtIndex:week]];