瀑布流 ajax 預載入 json
pbl.json【模擬後臺json數據】:
[
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"url": "http://www.wookmark.com/image/512047/spalvierdelciotto-designs-a-led-desk-lamp-for-lexon",
"width": "818",
"height": "472",
"image": "http://www.wookmark.com/images/original/512047_wookmark.jpg",
"preview": "http://www.wookmark.com/images/thumbs/512047_wookmark.jpg"
},
{
"id": "512103",
"title": "Changes",
"referer": "http://overcalm.co.vu/post/119516785288",
"url": "http://www.wookmark.com/image/512103/changes",
"width": "548",
"height": "629",
"image": "http://www.wookmark.com/images/original/512103_wookmark.png",
"preview": "http://www.wookmark.com/images/thumbs/512103_wookmark.png"
},
{
"id": "512182",
"title": "Unseen Cuba by Marius Jovai?a",
"referer": "https://aerial.photogrist.com/marius-jovaisa/",
"url": "http://www.wookmark.com/image/512182/unseen-cuba-by-marius-jovai-a",
"width": "1180",
"height": "785",
"image": "http://www.wookmark.com/images/original/512182_wookmark.jpg",
"preview": "http://www.wookmark.com/images/thumbs/512182_wookmark.jpg"
},
{
"id": "512193",
"title": "It looks better in black",
"referer": "https://www.facebook.com/itlooksbetterinblack/photos/pb.616706738402860.-2207520000.1432248795./874942449245953/?type=1&theater",
"url": "http://www.wookmark.com/image/512193/it-looks-better-in-black",
"width": "500",
"height": "750",
"image": "http://www.wookmark.com/images/original/512193_wookmark.png",
"preview": "http://www.wookmark.com/images/thumbs/512193_wookmark.png"
},
{
"id": "512225",
"title": "Matt‘s Mini-ITX - Album on Imgur",
"referer": "http://imgur.com/a/e8lFa",
"url": "http://www.wookmark.com/image/512225/matt-s-mini-itx-album-on-imgur",
"width": "3264",
"height": "2448",
"image": "http://www.wookmark.com/images/original/512225_wookmark.jpg",
"preview": "http://www.wookmark.com/images/thumbs/512225_wookmark.jpg"
}
]
html文件【這裏使用jquery】：
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/>
<title>jquery隨機圖片瀑布流無限載入</title>
<style type="text/css">
*{margin:0;padding:0;list-style-type:none;}
a,img{border:0;}
body{font:12px/180% Arial, Helvetica, sans-serif, "新宋體";}
.clearFixed:after{content:"";display: block;clear:both;}
/* container */
#container{width:940px;margin:50px auto;}
#container ul{width:300px;list-style:none;float:left;margin-right:20px;}
#container ul li{margin-bottom:20px;}
#container ul li img{width:300px;}
li p{color:#ccc;font-size: 16px;}
li a{color:#ccc;line-height:32px;text-decoration: none;}
li a:hover{text-decoration: underline;}
#load{width:100%;height:50px;display:none;position:fixed;left:0;bottom:0;background: rgba(0,0,0,.6);}
#load img{height:30px;padding-top:10px;display: block;margin:0 auto;}
</style>
</head>
<body>
<div id="container" class="clearFixed">
<ul class="col"></ul>
<ul class="col"></ul>
<ul class="col" style="margin-right:0"></ul>
</div>
<div id="load"><img src="images/load.gif"/></div>
</body>
</html>
<script type="text/javascript" src="jquery1.42.min.js"></script>
<script type="text/javascript">
$(function(){
var iNow=1;
var imgs=[];
function loadMeinv(){
$.ajax({
url:"pbl.json",
type:"post",
success:function(data)
{
// alert(iNow);
imgs=[];//清空數組
for(var v=iNow-1;v<iNow*9;v++)//新建暫時數組
{
if(data[v]==undefined)
{
$("#load").fadeOut();//假設沒有數據了 就隱藏load。而且不再載入
return false;
}
else
{
imgs.push([data[v]["image"],data[v]["title"],data[v]["url"]]);
}
}
//console.table(imgs);
var prepress=0;//用來推斷是否載入完數組裏面的數據
if(iNow<data.length/9)//推斷是否載入完了json裏面的數據
{
iNow++;
for(var i=0;i<imgs.length;i++)
{
(function(n){ //運行載入圖片
var yImg=new Image();
yImg.src=imgs[n][0];
yImg.onload=function()
{
// var dd=document.createElement("li");
// dd.innerHTML="<img src=‘"+yImg.src+"‘/>";
var dd=‘<li><a href="‘+imgs[n][2]+‘" target="_blank"><img src="‘+yImg.src+‘"/></a><p><a href="‘+imgs[n][2]+‘" target="_blank">‘+imgs[n][1]+‘</a></p></li>‘;
$minUl = getMinUl();
$minUl.append(dd);
prepress++;
if(prepress>=imgs.length) //控制是否已經運行完數組裏面的內容了
{
$("#load").fadeOut();
}
};
})(i);
}
}
else
{
$("#load").fadeOut();
return false;
}
// console.log(iNow);
}
})
}
loadMeinv();
$(window).bind("scroll",function(){
var $minUl = getMinUl();
if($minUl.height() <= $(window).scrollTop()+$(window).height()){
//當最短的ul的高度比窗體滾出去的高度+瀏覽器高度大時載入新圖片
$("#load").fadeIn();
// setTimeout(function(){
loadMeinv();
// $("#load").fadeOut();
// },2000);
}
});
function getMinUl(){//每次獲取最短的ul,將圖片放到其後
var $arrUl = $("#container .col");
var $minUl =$arrUl.eq(0);
$arrUl.each(function(index,elem){
if($(elem).height()<$minUl.height()){
$minUl = $(elem);
}
});
return $minUl;
}
})
</script>
瀑布流 ajax 預載入 json