tableView cell 和 headerView 一起滚动

实现方法一：

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {  
    if (scrollView == self.myTableView)  
    {  
        CGFloat sectionHeaderHeight = 44.0f;  
        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);  
        }  
    }  
}