ios webview h5的滚动怎么去掉

去掉滚动条代码如下：
UIWebView * d_intro = [[UIWebView alloc] init];
d_intro.delegate = self;
d_intro.dataDetectorTypes = UIDataDetectorTypeLink;
//取消右侧，下侧滚动条，去处上下滚动边界的黑色背景
d_intro.backgroundColor=[UIColor clearColor];
for (UIView *_aView in [d_intro subviews])
{
if ([_aView isKindOfClass:[UIScrollView class]])
{
[(UIScrollView *)_aView setShowsVerticalScrollIndicator:NO];
//右侧的滚动条

[(UIScrollView *)_aView setShowsHorizontalScrollIndicator:NO];
//下侧的滚动条

for (UIView *_inScrollview in _aView.subviews)
{
if ([_inScrollview isKindOfClass:[UIImageView class]])
{
_inScrollview.hidden = YES; //上下滚动出边界时的黑色的图片
}
}
}
}
[self.view addSubview:d_intro];