如何获得iframe的scrollTop [英] How to get scrollTop of an iframe

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本文介绍了如何获得iframe的scrollTop的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

当window是iframe时,jQuery的scrollTop返回null。有没有人能够弄清楚如何获得iframe的scrollTop?



更多信息:



我的脚本在iframe本身运行,父窗口在另一个域上,所以我无法访问iframe的ID或类似的东西

解决方案

您可以使用此设置设置 scrollTop

  $( HTML,身体)scrollTop的(25)。 

所以你可以试试这样:

  $( HTML,身体)scrollTop的(); 

因为不同的浏览器在不同的浏览器上设置 scrollTop 元素(正文或html)。



来自scrollTo插件:



但是在某些浏览器中可能仍会失败。以下是 Ariel Flesher的jQuery scrollTo插件源代码中的相关部分:

  //黑客,黑客,黑客:) 
//返回要滚动的真实元素(支持window / iframes ,文件和常规节点)
$ .fn._scrollable = function(){
返回this.map(function(){
var elem = this,
isWin =!elem .nodeName || $ .inArray(elem.nodeName.toLowerCase(),['iframe','#document','html','body'])!= -1;

if( !isWin){
return elem;
}


var doc =(elem.contentWindow || elem).document || elem.ownerDocument || elem;

返回$ .browser.safari || doc.compatMode =='BackCompat'?
doc.body:
doc.documentElement;
});
};

然后你可以运行:



<$ p $ 。p> $(窗口)._滚动()scrollTop的();

确定iframe向下滚动的距离。


jQuery's scrollTop returns null when window is an iframe. Has anyone been able to figure out how to get scrollTop of an iframe?

more info:

my script is running in the iframe itself, the parent window is on another domain, so I can't access the ID of the iframe or anything like that

解决方案

You can set scrollTop by using this setup:

$("html,body").scrollTop(25);

So you could try getting it like this:

$("html,body").scrollTop();

Because different browsers set the scrollTop on different elements (body or html).

From the scrollTo plugin:

But that will probably still fail in certain browsers. Here is the relevant section from the source code of Ariel Flesher's scrollTo plugin for jQuery:

// Hack, hack, hack :)
// Returns the real elements to scroll (supports window/iframes, documents and regular nodes)
$.fn._scrollable = function(){
  return this.map(function(){
    var elem = this,
      isWin = !elem.nodeName || $.inArray( elem.nodeName.toLowerCase(), ['iframe','#document','html','body'] ) != -1;

    if( ! isWin ) {
      return elem;
    }


    var doc = (elem.contentWindow || elem).document || elem.ownerDocument || elem;

     return $.browser.safari || doc.compatMode == 'BackCompat' ?
       doc.body : 
       doc.documentElement;
  });
};

You may then run:

$(window)._scrollable().scrollTop();

To determine how far the iframe has scrolled down.

这篇关于如何获得iframe的scrollTop的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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