UITableView在style为plain时,实现sectionHeader跟随cell移动

自定义一个SectionHeaderView,继承自UIView
.h方法

import <UIKit/UIKit.h>

@interface SectionHeaderView : UIView
@property NSUInteger section;
@property (nonatomic, weak) UITableView *tableView;

@end

.m方法

import "SectionHeaderView.h"

@implementation SectionHeaderView

- (void)setFrame:(CGRect)frame{
    CGRect sectionRect = [self.tableView rectForSection:self.section];
    CGRect newFrame = CGRectMake(CGRectGetMinX(frame), CGRectGetMinY(sectionRect), CGRectGetWidth(frame), CGRectGetHeight(frame));
    [super setFrame:newFrame];
}
@end

使用的时候:

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
    SectionHeaderView *sectionHead = [[SectionHeaderView alloc] init];
    sectionHead.section = section;
    sectionHead.tableView = tableView;
    return sectionHead;
}