Jquery implements waterfall flow layout (with detailed comments)

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Jquery implements waterfall flow layout (with detailed comments)_jquery

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May 16, 2016 pm 03:47 PM

jquery waterfall flow layout

The example in this article describes how Jquery implements waterfall flow layout. Share it with everyone for your reference. The details are as follows:

Waterfall flow layout is really popular recently. Many people want to know how to make it like me. After searching a lot of references on the Internet and experimenting with N sides, I finally wrote it out today. In order to make it easier for everyone to understand. I used jQuery (of course, the efficiency of using source js code will be higher, but many people are not very proficient in source js).

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Jquery瀑布流布局（每行代码都有详细注释）-作者：刘晓帆</title>
<style type="text/css">
body, ul, li, h3 { margin: 0; padding: 0; list-style: none; font: bold 12px "微软雅黑"; }
/*瀑布流布局样式*/
#lxf-box { position: relative; }
#lxf-box li { position: absolute; background: #fff; border: solid 1px #ccc; text-align: center; padding: 10px; left: 0px; top: 0; }
h3 { padding-top: 8px; }
img { width: 200px; height: auto; display: block; border: 0 }
/*css3动画*/
li { -webkit-transition: all .7s ease-out .1s; -moz-transition: all .7s ease-out; -o-transition: all .7s ease-out .1s; transition: all .7s ease-out .1s }
</style>
<script src="/js/jquery-1.6.4.min.js" type="text/javascript"></script>
</head>
<body>
<ul id="lxf-box">
 <li><a href="/"><img src="/demo/waterfall/OLqypfV.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/msbvKWyQQzZuZy.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/WbWXwqpcxqcued.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/rabGVkIGq.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/rSmEiZGlAvvuZ.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/YewRtz.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/STVDndiZsIduZyLv.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/mWFuVrzCzpPdzdje.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/MsZvAyOFukxdzdjefXwi.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/OEycuedk.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/YwabRquVKrxd.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/+nwbuJpc.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/qymffF.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/DvKZdxCjtfqMv.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/SOmyOQZtlUfdzdjefXwi.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/REsUNXUvAkrdzdj.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/DQJwrFnDpgtdz.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/eJupzWlGPxz.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/IWpjipjp.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/OXsDgKacJeTdzdjefXwi.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/QPIzxiMkmlHdzdjefX.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/mrTNaJTaQyluZyLvvnWS.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/mqXLNuWiPrbdz.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/MiEJRJdimxPdzdjefXw.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/CczowVxqM.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/rabGVkIGq.jpg"></a>
 <h3>图片标题</h3>
 </li>
 <li><a href="/"><img src="/demo/waterfall/zwPqjasxHYvdz.jpg"></a>
 <h3>图片标题</h3>
 </li>
</ul>
<script>
/*
原理：
1.把所有的li的高度值放到数组里面
2.第一行的top都为0
3.计算高度值最小的值是哪个li
4.把接下来的li放到那个li的下面
*/
var margin = 10;//这里设置间距
var li=$("li");//这里是区块名称
var  li_W = li[0].offsetWidth+margin;
//取区块的实际宽度（包含间距，这里使用源生的offsetWidth函数，不适用jQuery的width()函数是因为它不能取得实际宽度，例如元素内有pandding就不行了）
function liuxiaofan(){//定义成函数便于调用
  var h=[];//记录区块高度的数组
  var n = document.documentElement.offsetWidth/li_W|0;
  //窗口的宽度除以区块宽度就是一行能放几个区块
  for(var i = 0;i < li.length;i++) {//有多少个li就循环多少次
    li_H = li[i].offsetHeight;//获取每个li的高度
    if(i < n) {//n是一行最多的li，所以小于n就是第一行了
      h[i]=li_H;//把每个li放到数组里面
      li.eq(i).css("top",0);//第一行的Li的top值为0
      li.eq(i).css("left",i * li_W);
      //第i个li的左坐标就是i*li的宽度
      }
    else{
      min_H =Math.min.apply(null,h) ;//取得数组中的最小值，区块中高度值最小的那个
      minKey = getarraykey(h, min_H);//最小的值对应的指针
      h[minKey] += li_H+margin ;//加上新高度后更新高度值
      li.eq(i).css("top",min_H+margin);//先得到高度最小的Li，然后把接下来的li放到它的下面
      li.eq(i).css("left",minKey * li_W);  //第i个li的左坐标就是i*li的宽度
    }
    $("h3").eq(i).text("编号："+i+"，高度："+li_H);//把区块的序号和它的高度值写入对应的区块H3标题里面
  }
}
/* 使用for in运算返回数组中某一值的对应项数(比如算出最小的高度值是数组里面的第几个) */
function getarraykey(s, v) {for(k in s) {if(s[k] == v) {return k;}}}
/*这里一定要用onload，因为图片不加载完就不知道高度值*/
window.onload = function() {liuxiaofan();};
/*浏览器窗口改变时也运行函数*/
window.onresize = function() {liuxiaofan();};
</script>
</body>
</html>

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