CGRect oldFrame = webView.frame;

    CGFloat contentHeight = [[webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.body.offsetHeight;"]] floatValue];
    CGFloat contentWidth = [[webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.body.scrollWidth;"]] floatValue];
    [webView setFrame:CGRectMake(0, 0, contentWidth, contentHeight)];