jQuery实现无限加载瀑布流特效

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=100%; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;" /> <title>jQuery实现无限加载瀑布流特效</title>
<style type="text/css">
/* 标签重定义 */
body{padding:0;margin:0;background:#ddd url(images/bg.jpg) repeat;}
img{border:none;}
a{text-decoration:none;color:#444;}
a:hover{color:#999;}
#title{width:600px;margin:20px auto;text-align:center;}
/* 定义关键帧 */
@-webkit-keyframes shade{
  from{opacity:1;}
  15%{opacity:0.4;}
  to{opacity:1;}
}
@-moz-keyframes shade{
  from{opacity:1;}
  15%{opacity:0.4;}
  to{opacity:1;}
}
@-ms-keyframes shade{
  from{opacity:1;}
  15%{opacity:0.4;}
  to{opacity:1;}
}
@-o-keyframes shade{
  from{opacity:1;}
  15%{opacity:0.4;}
  to{opacity:1;}
}
@keyframes shade{
  from{opacity:1;}
  15%{opacity:0.4;}
  to{opacity:1;}
}
/* wrap */
#wrap{width:auto;height:auto;margin:0 auto;position:relative;}
#wrap .box{width:280px;height:auto;padding:10px;border:none;float:left;}
#wrap .box .info{width:280px;height:auto;border-radius:8px;box-shadow:0 0 11px #666;background:#fff;}
#wrap .box .info .pic{width:260px;height:auto;margin:0 auto;padding-top:10px;}
#wrap .box .info .pic:hover{
  -webkit-animation:shade 3s ease-in-out 1;
  -moz-animation:shade 3s ease-in-out 1;
  -ms-animation:shade 3s ease-in-out 1;
  -o-animation:shade 3s ease-in-out 1;
  animation:shade 3s ease-in-out 1;
}
#wrap .box .info .pic img{width:260px;border-radius:3px;}
#wrap .box .info .title{width:260px;height:40px;margin:0 auto;line-height:40px;text-align:center;color:#666;font-size:18px;font-weight:bold;overflow:hidden;}
</style>
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript">
window.onload = function(){
  //运行瀑布流主函数
  PBL('wrap','box');
  //模拟数据
  var data = [
    {'src':'1.jpg','title':'素材家园'},
    {'src':'2.jpg','title':'素材家园'},
    {'src':'3.jpg','title':'素材家园'},
    {'src':'4.jpg','title':'素材家园'},
    {'src':'5.jpg','title':'素材家园'},
    {'src':'6.jpg','title':'素材家园'},
    {'src':'7.jpg','title':'素材家园'},
    {'src':'8.jpg','title':'素材家园'},
    {'src':'9.jpg','title':'素材家园'},
    {'src':'10.jpg','title':'素材家园'}
  ];   //设置滚动加载
  window.onscroll = function(){
    //校验数据请求
    if(getCheck()){
      var wrap = document.getElementById('wrap');
      for(i in data){
        //创建box
        var box = document.createElement('div');
        box.className = 'box';
        wrap.appendChild(box);
        //创建info
        var info = document.createElement('div');
        info.className = 'info';
        box.appendChild(info);
        //创建pic
        var pic = document.createElement('div');
        pic.className = 'pic';
        info.appendChild(pic);
        //创建img
        var img = document.createElement('img');
        img.src = 'images/'+data[i].src;
        img.style.height = 'auto';
        pic.appendChild(img);
        //创建title
        var title = document.createElement('div');
        title.className = 'title';
        info.appendChild(title);
        //创建a标记
        var a = document.createElement('a');
        a.innerHTML = data[i].title;
        title.appendChild(a);
      }
      PBL('wrap','box');
    }
  }
}
/**
* 瀑布流主函数
* @param wrap [Str] 外层元素的ID
* @param box [Str] 每一个box的类名
*/
function PBL(wrap,box){
  // 1.获得外层以及每一个box
  var wrap = document.getElementById(wrap);
  var boxs = getClass(wrap,box);
  // 2.获得屏幕可显示的列数
  var boxW = boxs[0].offsetWidth;
  var colsNum = Math.floor(document.documentElement.clientWidth/boxW);
  wrap.style.width = boxW*colsNum+'px';//为外层赋值宽度
  // 3.循环出所有的box并按照瀑布流排列
  var everyH = [];//定义一个数组存储每一列的高度
  for (var i = 0; i < boxs.length; i++) {
    if(i<colsNum){
      everyH[i] = boxs[i].offsetHeight;
    }else{
      var minH = Math.min.apply(null,everyH);//获得最小的列的高度
      var minIndex = getIndex(minH,everyH); //获得最小列的索引
      getStyle(boxs[i],minH,boxs[minIndex].offsetLeft,i);
      everyH[minIndex] += boxs[i].offsetHeight;//更新最小列的高度
    }
  }
}
/**
* 获取类元素
* @param warp [Obj] 外层
* @param className [Str] 类名
*/
function getClass(wrap,className){
  var obj = wrap.getElementsByTagName('*');
  var arr = [];
  for(var i=0;i<obj.length;i++){
    if(obj[i].className == className){
      arr.push(obj[i]);
    }
  }
  return arr;
}
/**
* 获取最小列的索引
* @param minH [Num] 最小高度
* @param everyH [Arr] 所有列高度的数组
*/
function getIndex(minH,everyH){
  for(index in everyH){
    if (everyH[index] == minH ) return index;
  }
}
/**
* 数据请求检验
*/
function getCheck(){
  var documentH = document.documentElement.clientHeight;
  var scrollH = document.documentElement.scrollTop || document.body.scrollTop;
  return documentH+scrollH>=getLastH() ?true:false;
}
/**
* 获得最后一个box所在列的高度
*/
function getLastH(){
  var wrap = document.getElementById('wrap');
  var boxs = getClass(wrap,'box');
  return boxs[boxs.length-1].offsetTop+boxs[boxs.length-1].offsetHeight;
}
/**
* 设置加载样式
* @param box [obj] 设置的Box
* @param top [Num] box的top值
* @param left [Num] box的left值
* @param index [Num] box的第几个
*/
var getStartNum = 0;//设置请求加载的条数的位置
function getStyle(box,top,left,index){
  if (getStartNum>=index) return;
    $(box).css({
      'position':'absolute',
      'top':top,
      "left":left,
      "opacity":"0"
    });
    $(box).stop().animate({
      "opacity":"1"
    },999);
  getStartNum = index;//更新请求数据的条数位置
}
</script> </head>
<body>
<div id="wrap">   <div class="box">
    <div class="info">
      <div class="pic"><img src="data:images/1.jpg"></div>
      <div class="title"><a href="http://www.sucaijiayuan.com">素材家园</a></div>
    </div>
  </div>   <div class="box">
    <div class="info">
      <div class="pic"><img src="data:images/2.jpg"></div>
      <div class="title"><a href="http://www.sucaijiayuan.com">素材家园</a></div>
    </div>
  </div>   <div class="box">
    <div class="info">
      <div class="pic"><img src="data:images/3.jpg"></div>
      <div class="title"><a href="http://www.sucaijiayuan.com">素材家园</a></div>
    </div>
  </div>   <div class="box">
    <div class="info">
      <div class="pic"><img src="data:images/4.jpg"></div>
      <div class="title"><a href="http://www.sucaijiayuan.com">素材家园</a></div>
    </div>
  </div>   <div class="box">
    <div class="info">
      <div class="pic"><img src="data:images/5.jpg"></div>
      <div class="title"><a href="http://www.sucaijiayuan.com">素材家园</a></div>
    </div>
  </div>   <div class="box">
    <div class="info">
      <div class="pic"><img src="data:images/6.jpg"></div>
      <div class="title"><a href="http://www.sucaijiayuan.com">素材家园</a></div>
    </div>
  </div>   <div class="box">
    <div class="info">
      <div class="pic"><img src="data:images/7.jpg"></div>
      <div class="title"><a href="http://www.sucaijiayuan.com">素材家园</a></div>
    </div>
  </div>   <div class="box">
    <div class="info">
      <div class="pic"><img src="data:images/8.jpg"></div>
      <div class="title"><a href="http://www.sucaijiayuan.com">素材家园</a></div>
    </div>
  </div>   <div class="box">
    <div class="info">
      <div class="pic"><img src="data:images/9.jpg"></div>
      <div class="title"><a href="http://www.sucaijiayuan.com">素材家园</a></div>
    </div>
  </div>   <div class="box">
    <div class="info">
      <div class="pic"><img src="data:images/10.jpg"></div>
      <div class="title"><a href="http://www.sucaijiayuan.com">素材家园</a></div>
    </div>
  </div> </div>
</body>
</html>
上一篇:jquery.lazyload.js实现图片懒加载


下一篇:Raid1源代码分析--同步流程