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jQuery向下滚动即时加载内容实现的瀑布流效果,jquery向下滚动
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jQuery向下滚动即时加载内容实现的瀑布流效果,jquery向下滚动

Jun 13, 2016 am 08:48 AM
ajax jquery Waterfalls flow

jQuery向下滚动即时加载内容实现的瀑布流效果,jquery向下滚动

下拉滚动条或鼠标滚轮滚动到页面底部时, 动态即时加载新内容。

后台用 json 传输数据, 示例程序中只写了示例数组。数据也只设置了两个属性, 需根据实际应用改写。

页面用了 ul li 做为容器, 每个 li 表示一列

<ul id="stage"> 
 <li></li> 
 <li></li> 
 <li></li> PHP和Jquery和ajax实现下拉淡出瀑布流效果(无需插件) 
 <li></li> 
</ul> 
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JS代码

/* 
@版本日期: 版本日期: 2012年4月11日 
@著作权所有: 1024 intelligence ( http://www.1024i.com ) 
获得使用本类库的许可, 您必须保留著作权声明信息. 
报告漏洞,意见或建议, 请联系 Lou Barnes(iua1024@gmail.com) 
*/ 
$(document).ready(function(){ 
 loadMore(); 
}); 
$(window).scroll(function(){ 
 // 当滚动到最底部以上100像素时, 加载新内容 
 if ($(document).height() - $(this).scrollTop() - $(this).height()<100) loadMore(); 
}); 
function loadMore() 
{ 
 $.ajax({ 
  url : 'data.php', 
  dataType : 'json', 
  success : function(json) 
  { 
   if(typeof json == 'object') 
   { 
    var oProduct, $row, iHeight, iTempHeight; 
    for(var i=0, l=json.length; i<l; i++) 
    { 
     oProduct = json[i]; 
     // 找出当前高度最小的列, 新内容添加到该列 
     iHeight = -1; 
     $('#stage li').each(function(){ 
      iTempHeight = Number( $(this).height() ); 
      if(iHeight==-1 || iHeight>iTempHeight) 
      { 
       iHeight = iTempHeight; 
       $row = $(this); 
      } 
     }); 
     $item = $('<div><img  src="/static/imghw/default1.png"  data-src="'+oProduct.image+'"  class="lazy"+oProduct.image+'" border="0"  alt="jQuery向下滚动即时加载内容实现的瀑布流效果,jquery向下滚动" ><br />'+oProduct.title+'</div>').hide(); 
     $row.append($item); 
     $item.fadeIn(); 
    } 
   } 
  } 
 }); 
} 
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下面再给大家分享一段代码:PHP Jquery和ajax相结合实现下拉淡出瀑布流效果

我的风格,废话不多说,感兴趣的朋友直接看下文代码:

前台:

<br><&#63;php <br>$category=$this->getMyVal('category',$_GET);<br>$xiaohuaList=Xiaohua::model()->getXiaohao($category); //打开页面默认显示的数据<br>&#63;><br><br><div id="waterfall">
<&#63;php foreach ($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> 
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后台:

public function actionListXiaohua() {
$xiaohuaList=Xiaohua::model()->getXiaohua();//获取笑话信息
echo CJSON::encode($xiaohuaList);
} 
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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); 
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以上代码分为两部分给大家介绍了PHP和Jquery和ajax实现下拉淡出瀑布流效果,代码比较简单,附有注释,如有bug欢迎提出,帮客之家小编会在第一时间和大家联系的。谢谢!

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