iOS UIWebView去掉滚动条和黑色背景即拖拽后的上下阴影
隐藏滚动条和上下滚动时出边界的后面的黑色的背景
webView.backgroundColor=[UIColor clearColor];
for (UIView *aView in [webView subviews])
{
if ([aView isKindOfClass:[UIScrollView class]])
{
[(UIScrollView *)aView setShowsVerticalScrollIndicator:NO]; //右侧的滚动条 (水平的类似)
for (UIView *shadowView in aView.subviews)
{
if ([shadowView isKindOfClass:[UIImageView class]])
{
shadowView.hidden = YES; //上下滚动出边界时的黑色的图片 也就是拖拽后的上下阴影
}
}
}
}