- (void)webViewDidFinishLoad:(UIWebView *)webView
{
NSString *height_str= [webView stringByEvaluatingJavaScriptFromString: @"document.body.offsetHeight"];
int height = [height_str intValue];
webView.frame = CGRectMake(0,0,320,height);
NSLog(@"height: %@", [webView stringByEvaluatingJavaScriptFromString: @"document.body.offsetHeight"]);
}废话不多说 上代码～～～求相互交流～