UIWebView背景透明且无拖拽后的上下阴影

// set background transparent, also can set it in nib file
webView_.backgroundColor = [UIColor clearColor];
webView_.opaque = NO;

// remove shadow view when drag web view
for (UIView *subView in [webView_ subviews]) {
if ([subView isKindOfClass:[UIScrollView class]]) {
for (UIView *shadowView in [subView subviews]) {
if ([shadowView isKindOfClass:[UIImageView class]]) {
shadowView.hidden = YES;
}
}
}
}

// get html file path
NSString *path = [[NSBundle mainBundle] pathForResource:@"about" ofType:@"html"];
[webView_ loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:path]]];

// disable view bounce
[(UIScrollView *)[[webView_ subviews] objectAtIndex:0] setBounces:NO];

// disable touch move
<script type="text/javascript">
document.ontouchmove = function(e) {
e.preventDefault();
}
</script>

转自： http://blog.lanceli.com/2011/09/uiwebview-background-transparent.html[/code]