使用bootstrap的嵌入响应类，它最初是为youtube视频，但你可以调整它的高度。

如果你不能使用javascript，我建议使用引导和玩周围的嵌入响应-***类的html。我能够通过添加填充底部作为百分比来实现同样的效果，从而进一步相应地调整它。

<span class="iframe embed-responsive embed-responsive-16by9" style="display:block; padding-bottom: 10%;">
<iframe class="embed-responsive-item" width="100%" scrolling="no" src="example.com" frameBorder="0" ></iframe>
</span>

在我试遍了世界上所有的方法之后，这个方法真的很适合我。

index . html

<style type="text/css">
html, body{
  width:100%;
  height:100%;
  overflow:hidden;
  margin:0px;   
}
</style>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script type="text/javascript">
function autoResize(iframe) {
    $(iframe).height($(iframe).contents().find('html').height());
}
</script>

<iframe src="http://iframe.domain.com" width="100%" height="100%" marginheight="0" frameborder="0" border="0" scrolling="auto" onload="autoResize(this);"></iframe>

如果内容只是一个非常简单的html，最简单的方法是用javascript删除iframe

HTML代码:

<div class="iframe">
    <iframe src="./mypage.html" frameborder="0" onload="removeIframe(this);"></iframe>
</div>

Javascript代码:

function removeIframe(obj) {
    var iframeDocument = obj.contentDocument || obj.contentWindow.document;
    var mycontent = iframeDocument.getElementsByTagName("body")[0].innerHTML;
    obj.remove();
    document.getElementsByClassName("iframe")[0].innerHTML = mycontent;
}

<script type="application/javascript">

function resizeIFrameToFitContent( iFrame ) {

    iFrame.width  = iFrame.contentWindow.document.body.scrollWidth;
    iFrame.height = iFrame.contentWindow.document.body.scrollHeight;
}

window.addEventListener('DOMContentLoaded', function(e) {

    var iFrame = document.getElementById( 'iFrame1' );
    resizeIFrameToFitContent( iFrame );

    // or, to resize all iframes:
    var iframes = document.querySelectorAll("iframe");
    for( var i = 0; i < iframes.length; i++) {
        resizeIFrameToFitContent( iframes[i] );
    }
} );

</script>

<iframe src="usagelogs/default.aspx" id="iFrame1"></iframe>

如果你可以控制IFRAME内容和父窗口，那么你需要IFRAME调整器。

这个库允许自动调整相同域和跨域iframe的高度和宽度，以适应它们所包含的内容。它提供了一系列功能来解决使用iFrames时最常见的问题，包括:

Height and width resizing of the iFrame to content size. Works with multiple and nested iFrames. Domain authentication for cross domain iFrames. Provides a range of page size calculation methods to support complex CSS layouts. Detects changes to the DOM that can cause the page to resize using MutationObserver. Detects events that can cause the page to resize (Window Resize, CSS Animation and Transition, Orientation Change and Mouse events). Simplified messaging between iFrame and host page via postMessage. Fixes in page links in iFrame and supports links between the iFrame and parent page. Provides custom sizing and scrolling methods. Exposes parent position and viewport size to the iFrame. Works with ViewerJS to support PDF and ODF documents. Fallback support down to IE8.

使用bootstrap的嵌入响应类，它最初是为youtube视频，但你可以调整它的高度。

如果你不能使用javascript，我建议使用引导和玩周围的嵌入响应-***类的html。我能够通过添加填充底部作为百分比来实现同样的效果，从而进一步相应地调整它。

<span class="iframe embed-responsive embed-responsive-16by9" style="display:block; padding-bottom: 10%;">
<iframe class="embed-responsive-item" width="100%" scrolling="no" src="example.com" frameBorder="0" ></iframe>
</span>