去掉tableview头视图的粘性

self.headerHeight
为头视图的高度

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

    if (scrollView == self.tempTableview) {
        if (scrollView.contentOffset.y <=   self.headerHeight && scrollView.contentOffset.y >= 0) {
            scrollView.contentInset = UIEdgeInsetsMake(-scrollView.contentOffset.y, 0, 0, 0);
        }else{

            if (scrollView.contentOffset.y > self.headerHeight) {
                scrollView.contentInset = UIEdgeInsetsMake(-self.headerHeight, 0, 0, 0);
            }
        }

    }
}