隐藏tableview的headview

让tableview的headview随着tableview的滑动逐渐隐藏的方法

-(void)scrollViewDidScroll:(UIScrollView*)scrollView

{

    CGFloat sectionHeaderHeight=当前headview的高度;

    if(scrollView.contentOffset.y<=sectionHeaderHeight & scrollView.contentOffset.y>=0){

        scrollView.contentInset=UIEdgeInsetsMake(-scrollView.contentOffset.y,0,0,0);

    }

    elseif(scrollView.contentOffset.y>=sectionHeaderHeight){

        scrollView.contentInset=UIEdgeInsetsMake(-sectionHeaderHeight,0,0,0);

    }

}