iOS tableview 区头随着cell滑动

-(void)scrollViewDidScroll:(UIScrollView *)scrollView{

    CGFloat sectionHeaderHeight = 60;
    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);
        }
}
这是plain模式下的方法

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