- (void)webViewDidFinishLoad:(UIWebView *)wb{//方法1CGFloat documentWidth = [[wb stringByEvaluatingJavaScriptFromString:@"document.getElementById('content').offsetWidth"] floatValue];CGFloat documentHeight = [[wb stringByEvaluatingJavaScriptFromString:@"document.getElementById(\"content\").offsetHeight;"] floatValue];NSLog(@"documentSize = {%f, %f}", documentWidth, documentHeight);//方法2CGRect frame = wb.frame;frame.size.width = 768;frame.size.height = 1;// wb.scrollView.scrollEnabled = NO;wb.frame = frame;frame.size.height = wb.scrollView.contentSize.height;NSLog(@"frame = %@", [NSValue valueWithCGRect:frame]);wb.frame = frame;}

转：http://www.cnblogs.com/ihojin/p/webview-contentheight.html