#pragma mark - UICollectionViewDelegates for photos - (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
             UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, Main_Screen_Width, 50)];     headerView.backgroundColor=[UIColor clearColor];          //替换     UIView *circleView = [[UIView alloc]initWithFrame:CGRectMake(Main_Screen_Width*0.05, 10, 250, 30)];     [circleView setBackgroundColor:[UIColor clearColor]];     [headerView addSubview:circleView];               NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];     [dateFormatter setDateFormat:@"yyyy-MM-dd"];     NSDate *date = [dateFormatter dateFromString:[newDateArray objectAtIndex:section]];               NSDate *today = [NSDate date];     NSString *strWeek = [NDDateTools getWeekdayFromNSDate:date];          UIFont *myCustomFont1 = [UIFont fontWithName:@"Avenir-Light" size:22];     UIFont *myCustomFont2 = [UIFont fontWithName:@"Avenir-Light" size:14];     UIFont *myCustomFont3 = [UIFont fontWithName:@"Avenir-Light" size:16];          int compare = [NDDateTools compareOneDay:today withAnotherDay:date];     CGFloat topPadding = 10.0f;     if (compare == 0) {
            UILabel *todayLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, topPadding, 50, 20)];         todayLabel.text=  @"今天";         todayLabel.font = myCustomFont1;         todayLabel.backgroundColor = [UIColor clearColor];         todayLabel.textAlignment = NSTextAlignmentLeft;         todayLabel.textColor=RGBCOLOR(98, 98, 98);         [circleView addSubview:todayLabel];                  UILabel *dayLabel = [[UILabel alloc] initWithFrame:CGRectMake(todayLabel.frame.size.width, topPadding+5, 80, 20)];         NSString *strDay1 = [dateFormatter stringFromDate:date];         dayLabel.text=  strDay1;         dayLabel.font = myCustomFont2;         dayLabel.backgroundColor = [UIColor clearColor];         dayLabel.textAlignment = NSTextAlignmentCenter;         dayLabel.textColor=RGBCOLOR(137, 137, 137);         [circleView addSubview:dayLabel];                  UILabel *weekDayLabel = [[UILabel alloc] initWithFrame:CGRectMake(todayLabel.frame.size.width+dayLabel.frame.size.width, topPadding+5, 50, 20)];         weekDayLabel.text= [NSString stringWithFormat:@"(%@)",strWeek];         weekDayLabel.font = myCustomFont2;         weekDayLabel.backgroundColor = [UIColor clearColor];         weekDayLabel.textColor=RGBCOLOR(137, 137, 137);         weekDayLabel.textAlignment = NSTextAlignmentCenter;         [circleView addSubview:weekDayLabel];     }else{
                     UILabel *dayLabel = [[UILabel alloc] initWithFrame:CGRectMake(0,topPadding, 120, 20)];         NSString *strDay = [dateFormatter stringFromDate:date];         dayLabel.text=  strDay;         dayLabel.font = myCustomFont1;         dayLabel.backgroundColor = [UIColor clearColor];         dayLabel.textAlignment = NSTextAlignmentLeft;         dayLabel.textColor=RGBCOLOR(98, 98, 98);         [circleView addSubview:dayLabel];                  UILabel *weekDayLabel = [[UILabel alloc] initWithFrame:CGRectMake(dayLabel.frame.size.width,topPadding, 50, 25)];         weekDayLabel.text= [NSString stringWithFormat:@"(%@)",strWeek];         weekDayLabel.font = myCustomFont3;         weekDayLabel.backgroundColor = [UIColor clearColor];         weekDayLabel.textColor=RGBCOLOR(137, 137, 137);         weekDayLabel.textAlignment = NSTextAlignmentLeft;         [circleView addSubview:weekDayLabel];     }          return headerView; } - (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
        return 50.0; } //去掉UItableview headerview黏性(sticky) - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
        CGFloat sectionHeaderHeight = 50;     if (scrollView.contentOffset.y<=sectionHeaderHeight&&scrollView.contentOffset.y>=0) {
            scrollView.contentInset = UIEdgeInsetsMake(-scrollView.contentOffset.y, 0, 0, 0);     } else if (scrollView.contentOffset.y>=sectionHeaderHeight) {
            scrollView.contentInset = UIEdgeInsetsMake(-sectionHeaderHeight, 0, 0, 0);     } }