最近在做一些hybird框架的项目，对于embed的UIWebView，其宽度一般由Native app 指定，对于HTML页面

[html] 
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"> 

<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">

其中若是width指定为device-width，那么embed的UIWebView的宽不应设置小于device-width的值，如ipad的宽为768

在webView中查看HTML页面源代码

[cpp] 
- (void)webViewDidFinishLoad:(UIWebView *)webView_ { 
    NSString *jsToGetHTMLSource = @"document.getElementsByTagName('html')[0].innerHTML"; 
    NSString *HTMLSource = [webView_ stringByEvaluatingJavaScriptFromString:jsToGetHTMLSource]; 
    NSLog(@"%@",HTMLSource); 
}