先是 html 文件内容
// index.htmlJohn : This is out Rich Text Editing View
加载 html 文件
- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. NSBundle *mainBundle = [NSBundle mainBundle]; NSURL *indexFileURL = [mainBundle URLForResource:@"index" withExtension:@"html"]; [self.webView loadRequest:[NSURLRequest requestWithURL:indexFileURL]];} 计算 webView 显示内容后实际高度
两种方法，方法1可以得到内容的实际高度，方法2得到了将内容显示完整后的 webView 的尺寸（包含 UIEdgeInsets）
- (void)webViewDidFinishLoad:(UIWebView *)wb{ //方法1 CGFloat 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2 CGRect 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;} 截图：
