关于iframe跨页面设置高度

注意:这两种方式不支持跨域使用

1.jQuery简单实现iframe的高度根据页面内容自适应的方法(加载后展示使用)

方式1:

//注意:下面的代码是放在和iframe同一个页面中调用
$("#iframeId").load(function () {
    var mainheight = $(this).contents().find("body").height() + 30;
    $(this).height(mainheight);
});

方法2:

//注意:下面的代码是放在iframe引用的子页面中调用
$(window.parent.document).find("#iframeId").load(function () {
    var main = $(window.parent.document).find("#iframeId");
    var thisheight = $(document).height() + 30;
    main.height(thisheight);
});

2.原生自适应方式

<iframe id="mainFrame" name="mainFrame" scrolling="no" src="Index.aspx"frameborder="0" style="padding: 0px;  100%; height: 1000px;"></iframe>
<script type="text/JavaScript"> startInit('mainFrame', 560);</script>

js

var browserVersion = window.navigator.userAgent.toUpperCase();  
var isOpera = false, isFireFox = false, isChrome = false, isSafari = false, isIE = false;  
function reinitIframe(iframeId, minHeight) {  
    try {  
        var iframe = document.getElementById(iframeId);  
        var bHeight = 0;  
        if (isChrome == false && isSafari == false)  
            bHeight = iframe.contentWindow.document.body.scrollHeight;  
  
        var dHeight = 0;  
        if (isFireFox == true)  
            dHeight = iframe.contentWindow.document.documentElement.offsetHeight + 2;  
        else if (isIE == false && isOpera == false)  
            dHeight = iframe.contentWindow.document.documentElement.scrollHeight;  
        else if (isIE == true && ! -[1, ] == false) { } //ie9+  
        else  
            bHeight += 3;  
  
        var height = Math.max(bHeight, dHeight);  
        if (height < minHeight) height = minHeight;  
        iframe.style.height = height + "px";  
    } catch (ex) { }  
}  
function startInit(iframeId, minHeight) {  
    isOpera = browserVersion.indexOf("OPERA") > -1 ? true : false;  
    isFireFox = browserVersion.indexOf("FIREFOX") > -1 ? true : false;  
    isChrome = browserVersion.indexOf("CHROME") > -1 ? true : false;  
    isSafari = browserVersion.indexOf("SAFARI") > -1 ? true : false;  
    if (!!window.ActiveXObject || "ActiveXObject" in window)  
        isIE = true;  
    window.setInterval("reinitIframe('" + iframeId + "'," + minHeight + ")", 100);  
}  
原文地址:https://www.cnblogs.com/shihao905/p/6371153.html