PHP和Jquery和ajax实现瀑布流

PHP和Jquery和ajax实现下拉淡出瀑布流效果（无需插件）
不废话，直接上代码，您也可以点这里看瀑布流演示http://www.shouce.ren/post/xiaohua。
前台：<?php <br /> $category=$this->getMyVal('category',$_GET);<br> $xiaohuaList=Xiaohua::model()->getXiaohao($category); //打开页面默认显示的数据<br> ?><br> <br> <div> <br>     <?php foreach ($xiaohuaList as $xiaohua):?><br>         <?php $q_id=$xiaohua->id;?><br>         <div> <br>             <div> <span></span><strong>"><?php echo CHtml::encode($xiaohua->title);?></strong> </div> <br>             <div>"><?php echo $xiaohua->content;?></div> <br>             <div><span>);" class="fx cursor_p" data-id="<?php echo $q_id;?>"><span></span>分享</span></div> <br>         </div> <br>     <?php endforeach;?><br> </div> <br> <script><br /> var opt={<br /> getResource:function(index,render){//index为已加载次数,render为渲染接口函数,接受一个dom集合或jquery对象作为参数。通过ajax等异步方法得到的数据可以传入该接口进行渲染，如 render(elem)<br /> var html=&#039;&#039;;<br /> var _url=&#039;<?php echo $this->createUrl(&#039;listXiaohua&#039;);?>&#039;;<br /> $.ajax({<br /> type: "get",<br /> url: _url,<br /> dataType : "json",<br /> async:false,<br /> success: function(data){<br /> for( var i in data){<br /> var q_id=data[i].id;<br /> html+=&#039;<div class="cell m-bg item-h border_h"><div class="border-solid-b padding-b-5 text-center"><span class="g-bg glyphicon glyphicon-sunglasses margin-r-5" aria-hidden="true"><strong class="color-5 fx_t_&#039;+q_id+&#039;">&#039;+data[i].title+&#039;<div class="padding-t-5 fx_c_&#039;+q_id+&#039;">&#039;+data[i].content+&#039;&#039;<br /> +&#039;<div class="padding-t-5 text-right"><span onclick="fx(&#039;+q_id+&#039;);" class="fx cursor_p" data-id="&#039;+q_id+&#039;"><span class="g-bg glyphicon glyphicon-share-alt margin-r-5" aria-hidden="true">分享&#039;;<br /> }<br /> }});<br /> return $(html);<br /> },<br /> column_width:376,<br /> column_space:10,<br /> auto_imgHeight:true,<br /> insert_type:1<br /> }<br /> $(&#039;#waterfall&#039;).waterfall(opt);<br /> </script>后台：public function actionListXiaohua() {<br>         $xiaohuaList=Xiaohua::model()->getXiaohua();//获取笑话信息<br>         echo CJSON::encode($xiaohuaList);<br>     }js：;(function($){<br>    var<br>    //参数<br>    setting={<br>       column_width:240,//列宽<br>       column_className:'waterfall_column',//列的类名<br>       column_space:2,//列间距<br>       cell_selector:'.cell',//要排列的砖块的选择器，context为整个外部容器<br>       img_selector:'img',//要加载的图片的选择器<br>       auto_imgHeight:true,//是否需要自动计算图片的高度<br>       fadein:true,//是否渐显载入<br>       fadein_speed:600,//渐显速率，单位毫秒<br>       insert_type:1, //单元格插入方式，1为插入最短那列，2为按序轮流插入<br>       getResource:function(index){ }  //获取动态资源函数,必须返回一个砖块元素集合,传入参数为加载的次数<br>    },<br>    //<br>    waterfall=$.waterfall={},//对外信息对象<br>    $waterfall=null;//容器<br>    waterfall.load_index=0, //加载次数<br>    $.fn.extend({<br>        waterfall:function(opt){<br>           opt=opt||{};<br>           setting=$.extend(setting,opt);<br>           $waterfall=waterfall.$waterfall=$(this);<br>           waterfall.$columns=creatColumn();<br>           render($(this).find(setting.cell_selector).detach(),false); //重排已存在元素时强制不渐显<br>           waterfall._scrollTimer2=null;<br>           $(window).bind('scroll',function(){<br>              clearTimeout(waterfall._scrollTimer2);<br>              waterfall._scrollTimer2=setTimeout(onScroll,300);<br>           });<br>           waterfall._scrollTimer3=null;<br>           $(window).bind('resize',function(){<br>              clearTimeout(waterfall._scrollTimer3);<br>              waterfall._scrollTimer3=setTimeout(onResize,300);<br>           });<br>        }<br>    });<br>    function creatColumn(){//创建列<br>       waterfall.column_num=calculateColumns();//列数<br>       //循环创建列<br>       var html='';<br>       for(var i=0;i<waterfall.column_num></waterfall.column_num>          html+='<div></div>';<br>       }<br>       $waterfall.prepend(html);//插入列<br>       return $('.'+setting.column_className,$waterfall);//列集合<br>    }<br>    function calculateColumns(){//计算需要的列数<br>       var num=Math.floor(($waterfall.innerWidth())/(setting.column_width+setting.column_space));<br>       if(num       return num;<br>    }<br>    function render(elements,fadein){//渲染元素<br>       if(!$(elements).length) return;//没有元素<br>       var $columns = waterfall.$columns;<br>       $(elements).each(function(i){<br>           if(!setting.auto_imgHeight||setting.insert_type==2){//如果给出了图片高度，或者是按顺序插入，则不必等图片加载完就能计算列的高度了<br>              if(setting.insert_type==1){<br>                 insert($(elements).eq(i),setting.fadein&&fadein);//插入元素<br>              }else if(setting.insert_type==2){<br>                 insert2($(elements).eq(i),i,setting.fadein&&fadein);//插入元素<br>              }<br>              return true;//continue<br>           }<br>           if($(this)[0].nodeName.toLowerCase()=='img'||$(this).find(setting.img_selector).length>0){//本身是图片或含有图片<br>               var image=new Image;<br>               var src=$(this)[0].nodeName.toLowerCase()=='img'?$(this).attr('src'):$(this).find(setting.img_selector).attr('src');<br>               image.onload=function(){//图片加载后才能自动计算出尺寸<br>                   image.onreadystatechange=null;<br>                   if(setting.insert_type==1){<br>                      insert($(elements).eq(i),setting.fadein&&fadein);//插入元素<br>                   }else if(setting.insert_type==2){<br>                      insert2($(elements).eq(i),i,setting.fadein&&fadein);//插入元素<br>                   }<br>                   image=null;<br>               }<br>               image.onreadystatechange=function(){//处理IE等浏览器的缓存问题：图片缓存后不会再触发onload事件<br>                   if(image.readyState == "complete"){<br>                      image.onload=null;<br>                      if(setting.insert_type==1){<br>                         insert($(elements).eq(i),setting.fadein&&fadein);//插入元素<br>                      }else if(setting.insert_type==2){<br>                         insert2($(elements).eq(i),i,setting.fadein&&fadein);//插入元素<br>                      }<br>                      image=null;<br>                   }<br>               }<br>               image.src=src;<br>           }else{//不用考虑图片加载<br>               if(setting.insert_type==1){<br>                  insert($(elements).eq(i),setting.fadein&&fadein);//插入元素<br>               }else if(setting.insert_type==2){<br>                  insert2($(elements).eq(i),i,setting.fadein&&fadein);//插入元素<br>               }<br>           }<br>       });<br>    }<br>    function public_render(elems){//ajax得到元素的渲染接口<br>          render(elems,true);<br>    }<br>    function insert($element,fadein){//把元素插入最短列<br>       if(fadein){//渐显<br>          $element.css('opacity',0).appendTo(waterfall.$columns.eq(calculateLowest())).fadeTo(setting.fadein_speed,1);<br>       }else{//不渐显<br>          $element.appendTo(waterfall.$columns.eq(calculateLowest()));<br>       }<br>    }<br>    function insert2($element,i,fadein){//按序轮流插入元素<br>       if(fadein){//渐显<br>          $element.css('opacity',0).appendTo(waterfall.$columns.eq(i%waterfall.column_num)).fadeTo(setting.fadein_speed,1);<br>       }else{//不渐显<br>          $element.appendTo(waterfall.$columns.eq(i%waterfall.column_num));<br>       }<br>    }<br>    function calculateLowest(){//计算最短的那列的索引<br>       var min=waterfall.$columns.eq(0).outerHeight(),min_key=0;<br>       waterfall.$columns.each(function(i){<br>          if($(this).outerHeight()<min></min>             min=$(this).outerHeight();<br>             min_key=i;<br>          }<br>       });<br>       return min_key;<br>    }<br>    function getElements(){//获取资源<br>       $.waterfall.load_index++;<br>       return setting.getResource($.waterfall.load_index,public_render);<br>    }<br>    waterfall._scrollTimer=null;//延迟滚动加载计时器<br>    function onScroll(){//滚动加载<br>       clearTimeout(waterfall._scrollTimer);<br>       waterfall._scrollTimer=setTimeout(function(){<br>           var $lowest_column=waterfall.$columns.eq(calculateLowest());//最短列<br>           var bottom=$lowest_column.offset().top+$lowest_column.outerHeight();//最短列底部距离浏览器窗口顶部的距离<br>           var scrollTop=document.documentElement.scrollTop||document.body.scrollTop||0;//滚动条距离<br>           var windowHeight=document.documentElement.clientHeight||document.body.clientHeight||0;//窗口高度<br>           if(scrollTop>=bottom-windowHeight){<br>              render(getElements(),true);<br>           }<br>       },100);<br>    }<br>    function onResize(){//窗口缩放时重新排列<br>       if(calculateColumns()==waterfall.column_num) return; //列数未改变，不需要重排<br>       var $cells=waterfall.$waterfall.find(setting.cell_selector);<br>       waterfall.$columns.remove();<br>       waterfall.$columns=creatColumn();<br>       render($cells,false); //重排已有元素时强制不渐显<br>    }<br> })(jQuery);好了，全部完成了。这里看瀑布流演示http://www.shouce.ren/post/xiaohua。

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