瀑布流 ajax 预加载 json

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瀑布流 ajax 预加载 json

来源: 作者: 时间:2016-01-23 10:23 【

pbl json【模拟后台json数据】:[ { "id ": "511895 ", "title ": "Smashicons: 300 Free Icons | GraphicBurger ", "referer ": "ht

pbl.json【模拟后台json数据】:

 

[
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"preview": "http://www.wookmark.com/images/thumbs/511895_wookmark.jpg"
},
{
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},
{
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"title": "Bull / Logo Design by simc",
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},
{
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"title": "Female Portraits by Maxim Gurtovoy",
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{
"id": "512116",
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{
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{
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{
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{
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"title": "Digital Art Vision of Ecuador | Abduzeedo Design Inspiration",
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"title": "Digital Art Vision of Ecuador | Abduzeedo Design Inspiration",
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{
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"title": "Hong Kong Memoirs by Fan Ho",
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{
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"title": "Daily Inspiration #2083 | Abduzeedo Design Inspiration",
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},
{
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"title": "Apartment Building in Luxembourg / Metaform Architects on Inspirationde",
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"preview": "http://www.wookmark.com/images/thumbs/512641_wookmark.jpg"
},
{
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"title": "",
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{
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{
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{
"id": "512949",
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{
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{
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{
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{
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},
{
"id": "511907",
"title": "Cool by NaBHaN on DeviantArt",
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{
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{
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"title": "Mellow Electric Drive Skateboards | HiConsumption",
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},
{
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{
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{
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},
{
"id": "512047",
"title": "spalvierdelciotto designs a LED desk lamp for lexon",
"referer": "http://www.designboom.com/design/spalvierdelciotto-led-desk-lamp-05-18-2015/",
"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【这里使用jquery】:

 















        <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=[];//清空数组
        for(var v=iNow-1;v {
        if(data[v]==undefined)
        {
        $("#load").fadeOut();//如果没有数据了 就隐藏load,并且不再加载
        return false;
        }
        else
        {
        imgs.push([data[v]["image"],data[v]["title"],data[v]["url"]]);
        }


        }
        //console.table(imgs);
        var prepress=0;//用来判断是否加载完数组里面的数据
        if(iNow {
        iNow++;
        for(var i=0;i {
        (function(n){ //执行加载图片
        var yImg=new Image();
        yImg.src=imgs[n][0];
        yImg.onload=function()
        {
        // var dd=document.createElement("li");
        // dd.innerHTML="";
        var dd='
      • ';
        $minUl = getMinUl();
        $minUl.append(dd);
        prepress++;
        if(prepress>=imgs.length) //控制是否已经执行完数组里面的内容了
        {
        $("#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()){
        //当最短的ul的高度比窗口滚出去的高度+高度大时加载新图片
        $("#load").fadeIn();
        // setTimeout(function(){
        loadMeinv();
        // $("#load").fadeOut();
        // },2000);
        }
        });
        function getMinUl(){//每次获取最短的ul,将图片放到其后
        var $arrUl = $("#container .col");
        var $minUl =$arrUl.eq(0);
        $arrUl.each(function(index,elem){
        if($(elem).height()<$minUl.height()){
        $minUl = $(elem);
        }
        });
        return $minUl;
        }
        })
        </script>

         

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