导读：
瀑布流，又称瀑布流式布局。是比较流行的一种网站页面布局，视觉表现为参差不齐的多栏布局，随着页面滚动条向下滚动，这种布局还会不断加载数据块并附加至当前尾部。最早采用此布局的网站是Pinterest，逐渐在国内流行开来。国内大多数清新站基本为这类风格，像花瓣网、蘑菇街、美丽说等。
不废话，直接上代码，整段代码分为前后两段代码，具体代码如下所示。
前台：
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<?php <br>$category=$this->getMyVal('category',$_GET);<br>$xiaohuaList=Xiaohua::model()->getXiaohao($category); //打开页面默认显示的数据<br>?><br><br><div id="waterfall"><?php foreach ($xiaohuaList as $xiaohua):?><?php $q_id=$xiaohua->id;?><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"></span><strong class="color-5 fx_t_<?php echo $q_id;?>"><?php echo CHtml::encode($xiaohua->title);?></strong></div><div class="padding-t-5 fx_c_<?php echo $q_id;?>"><?php echo $xiaohua->content;?></div><div class="padding-t-5 text-right"><span onclick="fx(<?php echo $q_id;?>);" class="fx cursor_p" data-id="<?php echo $q_id;?>"><span class="g-bg glyphicon glyphicon-share-alt margin-r-5" aria-hidden="true"></span>分享</span></div></div><?php endforeach;?></div><script>var opt={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)var html='';var _url='<?php echo $this->createUrl('listXiaohua');?>';$.ajax({type: "get",url: _url,dataType : "json",async:false,success: function(data){for( var i in data){var q_id=data[i].id;html+='<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"></span><strong class="color-5 fx_t_'+q_id+'">'+data[i].title+'</strong></div><div class="padding-t-5 fx_c_'+q_id+'">'+data[i].content+'</div>'+'<div class="padding-t-5 text-right"><span onclick="fx('+q_id+');" class="fx cursor_p" data-id="'+q_id+'"><span class="g-bg glyphicon glyphicon-share-alt margin-r-5" aria-hidden="true"></span>分享</span></div></div>';}}});return $(html);},column_width:376,column_space:10,auto_imgHeight:true,insert_type:1}$('#waterfall').waterfall(opt);</script> |
后台：
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public function actionListXiaohua() {$xiaohuaList=Xiaohua::model()->getXiaohua();//获取笑话信息echo CJSON::encode($xiaohuaList);} |
js：
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;(function($){var//参数setting={column_width:240,//列宽column_className:'waterfall_column',//列的类名column_space:2,//列间距cell_selector:'.cell',//要排列的砖块的选择器，context为整个外部容器img_selector:'img',//要加载的图片的选择器auto_imgHeight:true,//是否需要自动计算图片的高度fadein:true,//是否渐显载入fadein_speed:600,//渐显速率，单位毫秒insert_type:1, //单元格插入方式，1为插入最短那列，2为按序轮流插入getResource:function(index){ } //获取动态资源函数,必须返回一个砖块元素集合,传入参数为加载的次数},//waterfall=$.waterfall={},//对外信息对象$waterfall=null;//容器waterfall.load_index=0, //加载次数$.fn.extend({waterfall:function(opt){opt=opt||{};setting=$.extend(setting,opt);$waterfall=waterfall.$waterfall=$(this);waterfall.$columns=creatColumn();render($(this).find(setting.cell_selector).detach(),false); //重排已存在元素时强制不渐显waterfall._scrollTimer2=null;$(window).bind('scroll',function(){clearTimeout(waterfall._scrollTimer2);waterfall._scrollTimer2=setTimeout(onScroll,300);});waterfall._scrollTimer3=null;$(window).bind('resize',function(){clearTimeout(waterfall._scrollTimer3);waterfall._scrollTimer3=setTimeout(onResize,300);});}});function creatColumn(){//创建列waterfall.column_num=calculateColumns();//列数//循环创建列var html='';for(var i=0;i<waterfall.column_num;i++){html+='<div class="'+setting.column_className+'" style="width:'+setting.column_width+'px; display:inline-block; *display:inline;zoom:1; margin-left:'+setting.column_space/2+'px;margin-right:'+setting.column_space/2+'px; vertical-align:top; overflow:hidden"></div>';}$waterfall.prepend(html);//插入列return $('.'+setting.column_className,$waterfall);//列集合}function calculateColumns(){//计算需要的列数var num=Math.floor(($waterfall.innerWidth())/(setting.column_width+setting.column_space));if(num<1){ num=1; } //保证至少有一列return num;}function render(elements,fadein){//渲染元素if(!$(elements).length) return;//没有元素var $columns = waterfall.$columns;$(elements).each(function(i){if(!setting.auto_imgHeight||setting.insert_type==2){//如果给出了图片高度，或者是按顺序插入，则不必等图片加载完就能计算列的高度了if(setting.insert_type==1){insert($(elements).eq(i),setting.fadein&&fadein);//插入元素}else if(setting.insert_type==2){insert2($(elements).eq(i),i,setting.fadein&&fadein);//插入元素}return true;//continue}if($(this)[0].nodeName.toLowerCase()=='img'||$(this).find(setting.img_selector).length>0){//本身是图片或含有图片var image=new Image;var src=$(this)[0].nodeName.toLowerCase()=='img'?$(this).attr('src'):$(this).find(setting.img_selector).attr('src');image.onload=function(){//图片加载后才能自动计算出尺寸image.onreadystatechange=null;if(setting.insert_type==1){insert($(elements).eq(i),setting.fadein&&fadein);//插入元素}else if(setting.insert_type==2){insert2($(elements).eq(i),i,setting.fadein&&fadein);//插入元素}image=null;}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if(image.readyState == "complete"){image.onload=null;if(setting.insert_type==1){insert($(elements).eq(i),setting.fadein&&fadein);//插入元素}else if(setting.insert_type==2){insert2($(elements).eq(i),i,setting.fadein&&fadein);//插入元素}image=null;}}image.src=src;}else{//不用考虑图片加载if(setting.insert_type==1){insert($(elements).eq(i),setting.fadein&&fadein);//插入元素}else if(setting.insert_type==2){insert2($(elements).eq(i),i,setting.fadein&&fadein);//插入元素}}});}function public_render(elems){//ajax得到元素的渲染接口render(elems,true);}function insert($element,fadein){//把元素插入最短列if(fadein){//渐显$element.css('opacity',0).appendTo(waterfall.$columns.eq(calculateLowest())).fadeTo(setting.fadein_speed,1);}else{//不渐显$element.appendTo(waterfall.$columns.eq(calculateLowest()));}}function insert2($element,i,fadein){//按序轮流插入元素if(fadein){//渐显$element.css('opacity',0).appendTo(waterfall.$columns.eq(i%waterfall.column_num)).fadeTo(setting.fadein_speed,1);}else{//不渐显$element.appendTo(waterfall.$columns.eq(i%waterfall.column_num));}}function calculateLowest(){//计算最短的那列的索引var min=waterfall.$columns.eq(0).outerHeight(),min_key=0;waterfall.$columns.each(function(i){if($(this).outerHeight()<min){min=$(this).outerHeight();min_key=i;}});return min_key;}function getElements(){//获取资源$.waterfall.load_index++;return setting.getResource($.waterfall.load_index,public_render);}waterfall._scrollTimer=null;//延迟滚动加载计时器function onScroll(){//滚动加载clearTimeout(waterfall._scrollTimer);waterfall._scrollTimer=setTimeout(function(){var $lowest_column=waterfall.$columns.eq(calculateLowest());//最短列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var scrollTop=document.documentElement.scrollTop||document.body.scrollTop||0;//滚动条距离var windowHeight=document.documentElement.clientHeight||document.body.clientHeight||0;//窗口高度if(scrollTop>=bottom-windowHeight){render(getElements(),true);}},100);}function onResize(){//窗口缩放时重新排列if(calculateColumns()==waterfall.column_num) return; //列数未改变，不需要重排var $cells=waterfall.$waterfall.find(setting.cell_selector);waterfall.$columns.remove();waterfall.$columns=creatColumn();render($cells,false); //重排已有元素时强制不渐显}})(jQuery); |
以上所述是小编给大家介绍的PHP+Jquery与ajax相结合实现下拉淡出瀑布流效果【无需插件】的相关介绍，希望对大家有所帮助，如果大家在使用过程中有任何疑问，请给我留言，小编会及时回复大家的。同时也非常感谢大家对服务器之家网站的支持！
