闲话少说，直接代码：

@implementation UIWebView (ClearBackground)

//去掉水平滚动条和黑色背景

- (void)clearTheBackgroundColorAndHorizontalScrollIndicator

{

    for (UIScrollView *view in self.subviews) {

        if ([view isKindOfClass:[UIScrollView class]]) {

            [view setShowsHorizontalScrollIndicator:NO];

            view.bounces = NO;

        }

    }

    [self setScalesPageToFit:YES];

    self.backgroundColor = [UIColor clearColor];

    [self setOpaque:NO];

}

@end