iOS TabeView 头视图和尾视图不滑动的实现

因项目有需求不能让section中的头尾视图滑动，顾根据网上的一些资料和自己整理的思路，已实现了不滑动效果，上代码，啥都说了，搞了2个小时都是泪。。。。

1.创建一个tableview

_mainTableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, kScreenWidth, kScreenHeight - 64) style:UITableViewStylePlain];//带导航栏－64
_mainTableView.backgroundColor = [UIColor clearColor];
_mainTableView.dataSource = self;
_mainTableView.delegate  = self;
_mainTableView.sectionHeaderHeight = 40;//headView高
_mainTableView.sectionFooterHeight = 64;//footerView高
_mainTableView.contentInset = UIEdgeInsetsMake(0, 0, -64, 0);//加载的时候需要底部视图

2. 实现scrollView代理协议

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    static CGFloat offsetCount = 0;
    CGFloat sectionHeaderHeight = 40;//设置headView和footerView的最大值
    CGFloat sectionFooterHeight = 64;//设置headView和footerView的最大值
    NSLog(@"%f",scrollView.contentOffset.y);

    if (scrollView.contentOffset.y<sectionHeaderHeight&&scrollView.contentOffset.y>=0) {//headerView刚开始的滑动
        if (offsetCount >= scrollView.contentOffset.y) {
            [scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
            //scrollView.contentInset = UIEdgeInsetsMake(-scrollView.contentOffset.y, 0, -sectionFooterHeight, 0);
        }else{
            
            scrollView.contentInset = UIEdgeInsetsMake(-scrollView.contentOffset.y, 0, -sectionFooterHeight, 0);
        }
    }
    else if (scrollView.contentOffset.y>=sectionHeaderHeight && scrollView.contentOffset.y + sectionFooterHeight < scrollView.contentSize.height - scrollView.frame.size.height&&scrollView.contentOffset.y>=0) {//中间的滑动
        scrollView.contentInset = UIEdgeInsetsMake(-sectionHeaderHeight, 0, -sectionFooterHeight, 0);
        
    }else if(scrollView.contentOffset.y + sectionFooterHeight >= scrollView.contentSize.height - scrollView.frame.size.height && scrollView.contentOffset.y < scrollView.contentSize.height - scrollView.frame.size.height&&scrollView.contentOffset.y>=0){//footerView结束的时候的滑动
        scrollView.contentInset = UIEdgeInsetsMake(-sectionHeaderHeight, 0,-(scrollView.contentSize.height - scrollView.frame.size.height - scrollView.contentOffset.y) , 0);
    }
    offsetCount = scrollView.contentOffset.y;
}