我有一个简单的解决方案，需要你确定链接的宽度和高度，请尝试(它适用于大多数浏览器):

<a href='#' onClick=" document.getElementById('myform').src='t2.htm';document.getElementById('myform').width='500px'; document.getElementById('myform').height='400px'; return false">500x400</a>

下面是一个简单的解决方案，使用与iframe内容相同的服务器提供的动态生成的样式表。很简单，样式表“知道”iframe中有什么，并且知道用于设置iframe样式的维度。这就绕过了同源策略限制。

http://www.8degrees.co.nz/2010/06/09/dynamically-resize-an-iframe-depending-on-its-content/

因此，所提供的iframe代码将有一个附带的样式表，像这样…

<link href=“http://your.site/path/to/css?contents_id=1234&dom_id=iframe_widget” rel=“stylesheet” type=“text/css” /> <iframe id=“iframe_widget” src=“http://your.site/path/to/content?content_id=1234” frameborder=“0” width=“100%” scrolling=“no”></iframe>

这要求服务器端逻辑能够计算iframe呈现内容的尺寸。

使用jQuery的最简单方法:

$("iframe")
.attr({"scrolling": "no", "src":"http://www.someotherlink.com/"})
.load(function() {
    $(this).css("height", $(this).contents().height() + "px");
});

最后，我找到了一些其他的解决方案，从iframe使用窗口发送数据到父网站。postMessage(消息、targetOrigin);。下面我来解释一下我是怎么做到的。

站点A = http://foo.com 站点B = http://bar.com

sitb在网站内部加载

SiteB网站有这条线

window.parent.postMessage("Hello From IFrame", "*"); 

or

window.parent.postMessage("Hello From IFrame", "http://foo.com");

然后site ea有如下代码

// Here "addEventListener" is for standards-compliant web browsers and "attachEvent" is for IE Browsers.
var eventMethod = window.addEventListener ? "addEventListener" : "attachEvent";
var eventer = window[eventMethod];


var messageEvent = eventMethod == "attachEvent" ? "onmessage" : "message";

// Listen to message from child IFrame window
eventer(messageEvent, function (e) {
   alert(e.data);
   // Do whatever you want to do with the data got from IFrame in Parent form.
}, false); 

如果你想添加安全连接，你可以在事件输入中使用这个If条件(messageEvent, function (e) {})

if (e.origin == 'http://iframe.example.com') {
    alert(e.data); 
    // Do whatever you want to do with the data got from IFrame in Parent form.
}

对于IE

IFrame内:

 window.parent.postMessage('{"key":"value"}','*');

外:

 eventer(messageEvent, function (e) {
   var data = jQuery.parseJSON(e.data);
   doSomething(data.key);
 }, false);

This is slightly tricky as you have to know when the iframe page has loaded, which is difficuly when you're not in control of its content. Its possible to add an onload handler to the iframe, but I've tried this in the past and it has vastly different behaviour across browsers (not guess who's the most annoying...). You'd probably have to add a function to the iframe page that performs the resize and inject some script into the content that either listens to load events or resize events, which then calls the previous function. I'm thinking add a function to the page since you want to make sure its secure, but I have no idea how easy it will be to do.

当你想缩小网页以适应iframe大小时:

您应该调整iframe的大小以适应内容 然后你应该缩小整个iframe与加载的网页内容

这里有一个例子:

<div id="wrap">
   <IFRAME ID="frame" name="Main" src ="http://www.google.com" />
</div>

<style type="text/css">
    #wrap { width: 130px; height: 130px; padding: 0; overflow: hidden; }
    #frame { width: 900px; height: 600px; border: 1px solid black; }
    #frame { zoom:0.15; -moz-transform:scale(0.15);-moz-transform-origin: 0 0; }
</style>