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
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");
});
其他回答
获取iframe内容高度，然后将其赋给这个iframe
var iframes = document.getElementsByTagName("iframe");
for(var i = 0, len = iframes.length; i<len; i++){
window.frames[i].onload = function(_i){
return function(){
iframes[_i].style.height = window.frames[_i].document.body.scrollHeight + "px";
}
}(i);
}
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.
<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>
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>
如果您可以控制iframe内容，我强烈建议使用
调整观察者大小
只需在iframe的srcdoc属性的末尾插入以下内容， 如果需要，可以转义。
<script type="text/javascript">
var ro = new ResizeObserver(entries => {
for (let entry of entries) {
const cr = entry.contentRect;
// console.log(window.frameElement);
window.frameElement.style.height =cr.height +30+ "px";
}
});
ro.observe(document.body);
</script>
