CGFloat lastContentOffset; //ScoreView 滑动位置 -(void)scrollViewWillBeginDragging:(UIScrollView*)scrollView{
lastContentOffset = scrollView.contentOffset.y;
} -( void )scrollViewDidScroll:( UIScrollView *)scrollView {
if (scrollView. contentOffset.y < lastContentOffset )
{
//向上,隐藏导航栏
[ self.navigationController setNavigationBarHidden : NO animated : YES ];
}
else if (scrollView. contentOffset.y > lastContentOffset )
{
//向下
[ self.navigationController setNavigationBarHidden : YES animated : YES ];
} }