在UITableViewStylePlain情况下sectionHeader可以与tableview一起滑动的解决方法

-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    CGFloat sectionHeaderHeight = 20;
    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);
    }
}