Iframe.readyState 在 chrome 中不起作用 [英] Iframe.readyState does not work in chrome

问题描述

我即时创建了一个 Iframe，并将下载二进制文件(xls、doc...)的页面设置为 url. 在下载文件时，我会显示一个动画.什么时候没有，我隐藏它.

I create an Iframe on the fly and set as the url a page that downloads a binary file (xls, doc...). While files are downloading I show an animation. When does not, I hide it.

问题是Chrome不知道文件什么时候完全下载，也就是iframe什么时候完全加载.我使用 iframe 属性 readyState 来检查 iframe 状态:

The problem is that Chrome does not know when the files are fully downloaded, that is when the iframe is completely loaded. I use the iframe property readyState to check the iframe state:

var iframe = document.createElement("iframe");
iframe.style.visibility = "hidden";
// I start a progress animation
window.setTimeout(showProgressAnimation, 1000);
// I start the file download
iframe.src ='GetFile.aspx?file=' + fileName;
document.body.appendChild(iframe);


function showProgressAnimation() {
   if (iframe.readyState == "complete" || iframe.readyState == "interactive") {
      // I stop the animation and show the page
      animation.style.display = 'none';
      progressBar.hide();
      $('#page').show();
   }
   else {
      // Chrome is always getting into this line
      window.setTimeout(showProgressAnimation, 1000);
   }
}

所以结果是无限循环.

我已经尝试了以下方法，它在 Firefox 和 Chrome 中工作但不是当内容是二进制文件时:

I've tried the following and it works in Firefox and Chrome but not when the contents are a binary file:

if ($.browser.mozilla || $.browser.webkit ) {
    iframe.onload = function showProgressAnimation() {
        animation.style.display = 'none';
        progressBar.hide();
        $('#page').show();
    }
}
// IE
else{
     window.setTimeout(showProgressAnimation, 1000);
}

推荐答案

您可以使用 onload 来通知 iframe

You can use the onload to signaling the load of the iframe

这是一个简单的例子

var iframe = document.createElement("iframe");
iframe.style.display = "none";
// this function will called when the iframe loaded
iframe.onload = function (){
  iframe.style.display = "block";    
  alert("loaded");
};
// set the src last.
iframe.src ='http://www.test.com';

// add it to the page.
document.getElementById("one").appendChild(iframe);

在这里测试:
http://jsfiddle.net/48MQW/5/
src 最后加载.
http://jsfiddle.net/48MQW/24/

Tested here:
http://jsfiddle.net/48MQW/5/
With src loaded last.
http://jsfiddle.net/48MQW/24/

这篇关于Iframe.readyState 在 chrome 中不起作用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！