时间上不需要一个一个的获取 可以用一个方法整体的获取我们想要的时间还有星期的数据

- (void)createDataString{
   
    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:NSCalendarIdentifierGregorian];
    NSDateComponents *comps = [[NSDateComponents alloc] init];
    NSInteger unitFlags = NSCalendarUnitYear |NSCalendarUnitMonth | NSCalendarUnitDay |NSCalendarUnitWeekday | NSCalendarUnitHour |NSCalendarUnitMinute |NSCalendarUnitSecond;
    comps = [calendar components:unitFlags fromDate:date];

    NSInteger week = [comps weekday];
   
    NSInteger year=[comps year];
   
    NSInteger month = [comps month];
   
    NSInteger day = [comps day];
   
    self.dateShowLabel.text=[NSString stringWithFormat:@"%ld年%ld月",year,month];
   
    self.dayLabel.text=[NSString stringWithFormat:@"%ld",day];
    self.weekShowLabel.text=[NSString stringWithFormat:@"%@",[arrWeek objectAtIndex:week]];
}