我正在开发一个类似igoogle的应用程序。来自其他应用程序(在其他域中)的内容使用iframe显示。
我如何调整iframes的大小以适应iframes的内容的高度?
我试图破译的javascript谷歌使用，但它是模糊的，搜索网络至今一无所获。
更新:请注意，内容是从其他域加载的，因此适用同源策略。
当前回答
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.
其他回答
http://www.phinesolutions.com/use-jquery-to-adjust-the-iframe-height.html上的解决方案很好(使用jQuery):
<script type=”text/javascript”>
$(document).ready(function() {
var theFrame = $(”#iFrameToAdjust”, parent.document.body);
theFrame.height($(document.body).height() + 30);
});
</script>
我不知道你是否需要在长度上加上30…我为我工作过。
仅供参考:如果你已经在你的iFrame上有一个“height”属性，这只是添加了style="height: xxx"。这可能不是你想要的。
iGoogle小工具必须主动实现调整大小，所以我猜在跨域模型中，如果没有远程内容以某种方式参与，你就无法做到这一点。如果您的内容可以使用典型的跨域通信技术将具有新大小的消息发送到容器页面，那么其余部分就很简单了。
<html>
<head>
<script>
function frameSize(id){
var frameHeight;
document.getElementById(id).height=0 + "px";
if(document.getElementById){
newheight=document.getElementById(id).contentWindow.document.body.scrollHeight;
}
document.getElementById(id).height= (frameHeight) + "px";
}
</script>
</head>
<body>
<iframe id="frame" src="startframe.html" frameborder="0" marginheight="0" hspace=20 width="100%"
onload="javascript:frameSize('frame');">
<p>This will work, but you need to host it on an http server, you can do it locally. </p>
</body>
</html>
使用jQuery:
parent.html
<body>
<script type="text/javascript" src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
<style>
iframe {
width: 100%;
border: 1px solid black;
}
</style>
<script>
function foo(w, h) {
$("iframe").css({width: w, height: h});
return true; // for debug purposes
}
</script>
<iframe src="child.html"></iframe>
</body>
child.html
<body>
<script type="text/javascript" src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
<script>
$(function() {
var w = $("#container").css("width");
var h = $("#container").css("height");
var req = parent.foo(w, h);
console.log(req); // for debug purposes
});
</script>
<style>
body, html {
margin: 0;
}
#container {
width: 500px;
height: 500px;
background-color: red;
}
</style>
<div id="container"></div>
</body>
下面是一个jQuery方法，它通过iframe的src属性在json中添加信息。这是一个演示，调整大小和滚动这个窗口。使用json生成的url如下所示… http://fiddle.jshell.net/zippyskippy/RJN3G/show/ {scrollHeight windowHeight docHeight: 5124: 1019: 571} #
这里是源代码提琴http://jsfiddle.net/zippyskippy/RJN3G/
function updateLocation(){
var loc = window.location.href;
window.location.href = loc.replace(/#{.*}#/,"")
+ "#{docHeight:"+$(document).height()
+ ",windowHeight:"+$(window).height()
+ ",scrollHeight:"+$(window).scrollTop()
+"}#";
};
//setInterval(updateLocation,500);
$(window).resize(updateLocation);
$(window).scroll(updateLocation);
