瀑布流图片效果实现 

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title></title>
    <style type="text/css">
        *{
            margin: 0;
            padding: 0;
        }
        #wrap{
            position: relative;
            list-style: none;
            margin: 0 auto;
        }
        #wrap li{
            width: 200px;
            font-size: 1.5rem;
            position: absolute;
            background-color: #CCCCCC;
            -webkit-transition: all 2s;
        }
        #wrap li div{
            width: 100%;
            height: 100%;
            overflow: hidden;
        }
    </style>
</head>
<body>
<ul id="wrap"></ul>
</body>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script type="text/javascript">
$(function(){
function randomFunction(max , min){
    return parseInt(Math.random() * (max - min)) + min;
}
var wrapUL = document.getElementById("wrap");
var width = 200;
var rightPadding = 10;
var hs = [];
var num = 0;
function setLiPos(bol){
    var lis = wrapUL.getElementsByTagName("li");
    var windowBody = document.documentElement.clientWidth;
    var cols = parseInt(windowBody / width);
    wrapUL.style.width = cols * (width + rightPadding) + "px";
    var arrT = [];
    for (var i = 0; i < cols; i++) {
        arrT[i] = 0;
    }
    function createLi(index){
        var li = lis[index]||document.createElement("li");
        
        var h = hs[index] || randomFunction(100, 300);
        li.style.height = h + "px";
        if(bol){
            hs.push(h);
        }
        var min = arrT[0];
        var minIndex = 0;
        for (var i = 0; i < arrT.length; i++) {
            if(min > arrT[i]){
                min = arrT[i];
                minIndex = i;
            }
        }
        li.style.top = arrT[minIndex] + "px";
        li.style.left = minIndex * (width + rightPadding) + "px"; arrT[minIndex] += (h + rightPadding);
        bol&&wrapUL.appendChild(li);
    }
    for(var i = 0; i < 20; i++){
        if(bol){
            num++;
        }
        createLi(i);
    }
}
setLiPos(true);
window.onresize = function(){
    setLiPos(false);
}
});
</script>
<script type="text/javascript">
$(function(){
    var imgArr = ["1.jpg","2.jpg","3.jpg","4.jpg","5.jpg","6.jpg","7.jpg"];
    $("li").each(function(index, el) {
        var n = RandomNumBoth(0,imgArr.length-1);
        var imgsrc =  imgArr[n];
        $(this).html("<div><img onload='loadImage()' src='"+imgsrc+"'></div>");
    });
});
function loadImage(){
    $("img").each(function(index, el) {
        var a=$(this).width(),
        b=$(this).height(),
        pa = $(this).parent().width(),
        pb = $(this).parent().height(),
        e=a/b, //图片宽高比  3
        pe=pa/pb;  //承载图片容器宽高比  
        if(e>=pe){
           $(this).css({height:"100%",width:"auto"});
           var imgW = $(this).width(),
            iW = $(this).parent().width(),
            w = -(imgW - iW)/2;
            $(this).css('marginLeft',w);
        }else{
            $(this).css({width:"100%",height:"auto"});
            var imgH = $(this).height(),
            iH = $(this).parent().height(),
            h = -(imgH - iH)/2;
            $(this).css('marginTop',h);
        }
    });
}
function RandomNumBoth(Min,Max){
      var Range = Max - Min;
      var Rand = Math.random();
      var num = Min + Math.round(Rand * Range);
      return num;
}
</script>
</html>

　　

posted on 2017-06-30 11:03  jasonduanmu  阅读(126)  评论(0)  编辑  收藏  举报

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