预加载页面

我想创建一个完整页面的预加载器。预加载页面

<body> 
<div id="preload-content">Please wait</div> 
<div id="body-container" style="background-image:url(very-big-image-file.jpg);"> 
// page contents goes here 
</div> 
</body>

现在我在我的＃body-container中有一个巨大的图像。我使用jQuery，当我使用.ready（）函数页面出现，但图像仍在加载。

$("body").ready(function() { 
    $("#preload-content").delay(500).fadeOut(400, function() { 
     $("#body-container").fadeIn(200); 
     $("body").css("background-color","#fff").css("color","#000"); 
    }); 
});

$（document）.ready（）也不起作用。我想显示所有图像，插件，脚本，css文件加载成功后的＃body-container！所以......我该怎么做。

来源

2010-12-03 mrtakdnz

图像将在单独的线程加载。所以，它不会影响ready（）函数。 – WaiLam 2010-12-03 08:57:11

您可以试试。

 $("body").ready(function() { 

     // Create a image object 
     var bgImage = new Image(); 

     // bind loading event 
     $(bgImage).bind("onload",function(){ 

      // Set the background css 
      $("#body-container").css('background-image','url(very-big-image-file.jpg)'); 

      // Fade your preloader content 
      $("#preload-content").delay(500).fadeOut(400, function() { 
       $("#body-container").fadeIn(200); 
       $("body").css("background-color","#fff").css("color","#000"); 
      }); 
     }); 

     //Start loading your image 
     bgImage.src = "very-big-image-file.jpg"; 

     });

为某些错字错误道歉。但是这个概念就是这样。

来源

2010-12-03 09:03:20 WaiLam

但我能做些什么，如果我的网页上有更大的图像？我必须将所有图像onload函数绑定到对方吗？ – mrtakdnz 2010-12-03 09:15:19

是的，你可以创建一个预加载函数来输入一个你想要预加载的imge路径的数组。但我不认为在页面显示之前预先加载大量的图像并不好。 – WaiLam 2010-12-03 09:24:04

当你调用$("anything").ready()时，它全部到达相同的地方（当DOM准备就绪时，事件处理程序，不一定是所有资源），选择器实际上并不重要。

你在这里想要什么，虽然是window.onload，当图像已加载为好，这样它将触发：

$(window).load(function() { 
    $("#preload-content").delay(500).fadeOut(400, function() { 
     $("#body-container").fadeIn(200); 
     $("body").css("background-color","#fff").css("color","#000"); 
    }); 
});

确认这是之外的任何document.ready处理程序，因为有一个机会onload事件已经执行。

来源

2010-12-03 09:37:49

尝试这一个：

<html> 
    <head> 
     <!-- Include the heartcode canvasloader js file --> 
    <script src="http://heartcode-canvasloader.googlecode.com/files/heartcode-canvasloader-min-0.9.1.js"></script> 

     <style type="text/css"> 
     body, html { 
      margin:0; 
      padding:0; 
      overflow:hidden; 
      background-color:#353535; 
     } 
     .wrapper { 
      position:absolute; 
      top:50%; 
      left:50%; 
     } 
      #contenedor { 
        background-color: #fff; 
      } 
    </style> 
    </head> 

    <body onLoad="document.getElementById('precarga').style.visibility='hidden';document.getElementById('contenedor').style.visibility='visible';" > 

     <div id="precarga" style="visibility: visible"> 
      <!-- Create a div which will be the canvasloader wrapper -->  
    <div id="canvasloader-container" class="wrapper"></div> 

    <!-- This script creates a new CanvasLoader instance and places it in the wrapper div --> 
    <script type="text/javascript"> 
     var cl = new CanvasLoader('canvasloader-container'); 
     cl.setColor('#9e9e9e'); // default is '#000000' 
     cl.setShape('spiral'); // default is 'oval' 
     cl.setDiameter(200); // default is 40 
     cl.setDensity(160); // default is 40 
     cl.setRange(1); // default is 1.3 
       cl.setSpeed(1); // default is 2 
     cl.setFPS(60); // default is 24 
     cl.show(); // Hidden by default 

     // This bit is only for positioning - not necessary 
     var loaderObj = document.getElementById("canvasLoader"); 
     loaderObj.style.position = "absolute"; 
     loaderObj.style["top"] = cl.getDiameter() * -0.5 + "px"; 
     loaderObj.style["left"] = cl.getDiameter() * -0.5 + "px"; 
    </script> 
     </div> 

     <div id="contenedor" style="visibility: hidden"> 
      <!-- Modify this with your content [start] --> 
      <p align="justify"> 
       Lorem ipsum dolor sit amet, sit rhoncus tellus tristique ipsum, etiam enim commodo purus ligula, dui praesent vivamus fusce vel, justo vitae nesciunt suspendisse. Pretium elit maecenas mollis pellentesque, leo in vestibulum vitae habitasse dolor lacus, elit pharetra nec cras suspendisse, lectus eget nulla elit. Ut sapien velit quis accumsan nibh varius. Nunc maecenas, eu sapien porttitor convallis, nullam cras. Dolores mauris cum at velit, mauris posuere nunc euismod. Vel leo volutpat scelerisque aliquam mi.</p> 
      <p align="justify"> 
       Aenean sed per nec in facilisis ullamcorper, mattis cras neque mauris fusce. Non odio gravida et, aliquet laoreet ac consequat risus, ut ridiculus sit massa est. A tristique adipiscing nulla, vel interdum magna. Luctus tincidunt curabitur erat ac, nisl praesent odio, in ullamcorper sem, proin tortor, dignissim feugiat orci non quam vitae mi. Id amet, vitae magna nunc velit vel, cras wisi tincidunt magnam at donec venenatis. Rutrum quis turpis eget. Nec quis donec sed non ultrices gravida, suscipit varius vivamus, velit libero quis imperdiet molestie.</p> 
      <p align="justify"> 
       Pellentesque ornare eu lacus non, pede tempus velit duis, gravida nam phasellus sem, amet accumsan tincidunt wisi. Et libero et neque, aliquam pretium rerum neque, feugiat malesuada est sed autem a platea, lectus ultrices. Vitae tristique aliquet, tincidunt wisi velit odio sodales nunc nunc. Sed tincidunt turpis a nullam magna, sagittis vestibulum pellentesque integer montes neque, nunc odio neque diam lorem integer, sociis eu. Maecenas ut lectus senectus auctor dictum, ligula volutpat nulla pulvinar nam pellentesque pellentesque, vitae morbi magna dui in risus, aliquam vel mi odio purus duis suspendisse, justo mattis morbi integer. Pretium nec a, duis nunc mi, in vel. Lacus dui, eros nulla justo sollicitudin. Turpis et et pharetra non.</p> 
      <p align="justify"> 
       Nunc maecenas turpis, vel in sed eget arcu, elit vitae. Curabitur et odio in ornare metus est. Massa porttitor consectetuer. Vitae bibendum, consectetuer duis diam quam in, est etiam aliquam enim molestie scelerisque. Vestibulum sed eros ac vitae lectus. A leo, quod volutpat id et lacus vitae vitae. Aenean tellus vivamus parturient metus, pellentesque ut lorem ut orci nisl. Ut et id luctus eros, feugiat in malesuada tellus quisque, iaculis tristique, nonummy massa voluptas vel. Elit a erat pulvinar sem sagittis, ligula eget est amet, a tristique ut ac wisi, gravida donec et eget nec. Amet nec, ut non penatibus eget, ornare purus sollicitudin a tincidunt vitae rutrum, commodo non faucibus, aut pretium risus lorem nulla egestas auctor.</p> 
      <p align="justify"> 
      </p> 
      <img src="http://v11.nonxt8.c.bigcache.googleapis.com/static.panoramio.com/photos/original/21785753.jpg?redirect_counter=1"/> 
      <!-- Modify this with your content [end] --> 
     </div> 

    </body> 
</html>

来源

2011-11-29 19:29:37

回答

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