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

　　CGFloat sectionHeaderHeight = sectionHead.height; // 区头高度

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

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

　　} else if(

　　　　scrollView.contentOffset.y>=sectionHeaderHeight) {

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

　　}

}