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PHP combines Jquery and ajax to implement waterfall flow effects, jqueryajax_PHP tutorial

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WBOYOriginal
2016-07-12 09:01:17959browse

PHP combines Jquery and ajax to achieve waterfall flow effects, jqueryajax

No nonsense, just go to the code,

Front desk: 

<&#63;php 
$category=$this->getMyVal('category',$_GET);
$xiaohuaList=Xiaohua::model()->getXiaohao($category); //打开页面默认显示的数据
&#63;>
<div id="waterfall">
  <&#63;php foreach ($xiaohuaList as $xiaohua):&#63;>
    <&#63;php $q_id=$xiaohua->id;&#63;>
    <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_<&#63;php echo $q_id;&#63;>"><&#63;php echo CHtml::encode($xiaohua->title);&#63;></strong></div>
      <div class="padding-t-5 fx_c_<&#63;php echo $q_id;&#63;>"><&#63;php echo $xiaohua->content;&#63;></div>
      <div class="padding-t-5 text-right"><span onclick="fx(<&#63;php echo $q_id;&#63;>);" class="fx cursor_p" data-id="<&#63;php echo $q_id;&#63;>"><span class="g-bg glyphicon glyphicon-share-alt margin-r-5" aria-hidden="true"></span>分享</span></div>
    </div>
  <&#63;php endforeach;&#63;>
</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='<&#63;php echo $this->createUrl('listXiaohua');&#63;>';
   $.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>

Backstage: 

public function actionListXiaohua() {
  $xiaohuaList=Xiaohua::model()->getXiaohua();//获取笑话信息
  echo CJSON::encode($xiaohuaList);
}

js: 

(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'&#63;$(this).attr('src'):$(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);

Okay, all done.

Let me share one more with you

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>定宽Jquery+AJAX+JSON瀑布流布局（每行代码都有详细注释）</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; width: 1000px; margin:0 auto;}
#lxf-box li { background: #fff; border: solid 1px #ccc; text-align: center; padding: 10px; float: left;}
h3 { padding-top: 8px; }
img { width: 200px; height: auto; display: block; border: 0 }
/*css3动画 注由于是css3制作的所以兼容性不保证 要想兼容性好 请自己做成gif动画加载图*/
/*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 }*/
#loading { display:none; line-height: 30px; background: #000; color:#fff; text-align: center; height: 30px; width: 100%; position:fixed; bottom:0; opacity:0.8;}
</style>
<script src="/templets/niu/js/jquery.min.js" type="text/javascript"></script>
</head>
<body>
<h1 color="red">预览无效果请刷新</h1>
<ul id="lxf-box">
 <li><a href="div_css/342.html"><img src="/uploads/allimg/120814/1-120Q411544TX.jpg"></a>
  <h3>图片标题</h3>
 </li>
 <li><a href="/ajax/237.html"><img src="/uploads/allimg/120801/1-120P1223013157.jpg"></a>
  <h3>图片标题</h3>
 </li>
 <li><a href="/js_ad/271.html/"><img src="/uploads/allimg/120808/1-120PP00915a2.jpg"></a>
  <h3>图片标题</h3>
 </li>
 <li><a href="/js_texiao/312.html/"><img src="/uploads/allimg/120812/1-120Q2150022G8.jpg"></a>
  <h3>图片标题</h3>
 </li>
 <li><a href="/js_pic/191.html/"><img src="/uploads/allimg/120722/1-120H2144003129.jpg"></a>
  <h3>图片标题</h3>
 </li>
 <li><a href="/js_pic/318.html/"><img src="/uploads/allimg/120812/1-120Q2161941b2.jpg"></a>
  <h3>图片标题</h3>
 </li>
 <li><a href="/div_css/341.html/"><img src="/uploads/allimg/120814/1-120Q4113240U2.jpg"></a>
  <h3>图片标题</h3>
 </li>
 <li><a href="/div_css/350.html/"><img src="/uploads/allimg/120814/125411K11-2.png"></a>
  <h3>图片标题</h3>
 </li>
 <li><a href="/div_css/350.html/"><img src="/uploads/allimg/120814/1254113249-12.png"></a>
  <h3>图片标题</h3>
 </li>
 <li><a href="/div_css/349.html/"><img src="/uploads/allimg/120814/12500a292-1.png"></a>
  <h3>图片标题</h3>
 </li>
 <li>img src="/uploads/allimg/120813/1-120Q3145U0938.jpg">
  <h3>图片标题</h3>
 </li>
 <li><a href="/div_css/344.html/"><img src="/uploads/allimg/120814/12353B521-0.jpg"></a>
  <h3>图片标题</h3>
 </li>
</ul>
<div id="loading">正在加载……</div>
<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
编写时间：2012年6月9日
*/
 
function iiwnet(){//定义成函数便于调用
var wrap = document.getElementById("lxf-box")
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）
var h=[];//记录区块高度的数组
  li.css("position","absolute");
  var n = wrap.offsetWidth/li_W|0;//容器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
    $("li").animate({opacity:1});
  }
}
/* 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() {iiwnet();};
/*浏览器窗口改变时也运行函数*/
window.onresize = function() {iiwnet();};
 
/**********************************************************************/
/*无限加载*/
var i=1;
function getMore(){
  $("#loading").show();  
  var json = "http://www.bkjia.com/images/jstx/img.js";
    $.getJSON(json, function(data){ 
        $.each(data,function(i){
        var url=data[i].url;  
        var html="<li style='opacity:0'><a href='http://www.bkjia.com/'><img src="+url+" ></a><h3>图片标题</h3></li>";    
      $("#lxf-box").append(html);   
          $("#loading").hide();
        });
        iiwnet();
        i=1
    });
  };
  /*滚动到底部的时候*/
   $(window).bind("scroll",function(){
  if( $(document).scrollTop() + $(window).height() > $(document).height() - 10 && i==1) {
    i=0;
    getMore();
     
    }
   });
</script>
</body>
</html>
<p align="center"><font color=red>如果运行效果无非显示请点击【刷新页面】</font><br/>【<a href="http://www.bkjia.com" target="_blank"><font color="#666666">返回首页</font></a>】【<a href="javascript:this.location.reload()"><font color="#666666">刷新本页</font></a>】【<a href="javascript:window.scroll(0,0)"><font color="#666666">返回顶部</font></a>】【<a href="javascript:window.close()"><font color="#666666">关闭本页</font></a>】</p>

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