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主頁(yè) > 知識(shí)庫(kù) > 滑輪滾動(dòng)到頁(yè)面底部ajax加載數(shù)據(jù)配合jsonp實(shí)現(xiàn)探討

滑輪滾動(dòng)到頁(yè)面底部ajax加載數(shù)據(jù)配合jsonp實(shí)現(xiàn)探討

滾動(dòng)下拉到頁(yè)面底部加載數(shù)據(jù)是很多瀑布流網(wǎng)站的做法，那來(lái)看看配合jsonp是如何實(shí)現(xiàn)的吧，小菜總結(jié)記錄之用，高手勿噴。

當(dāng)然本例子采用的是jquery庫(kù)，后期會(huì)做成原生js。
本例的數(shù)據(jù)調(diào)用的是鋒利的jquery一書(shū)提供的一段json。

首先要先判斷頁(yè)面怎么樣才是滾動(dòng)到底部，也就是scrollTop+window的height是否大于document的height，jquery如下代碼: $(window).scrollTop()+$(window).height()>=$(document).height()；
再給window綁定scroll事件。所以整個(gè)頁(yè)面demo可以這樣做:

復(fù)制代碼代碼如下:

 
!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> 
title>/title> 
meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
style type="text/css"> 
* { margin:0; padding:0;} 
body { font-size:12px;} 
p{ margin: 5px;} 
.box{ padding: 10px;} 
/style> 
!-- 引入jQuery --> 
script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.3/jquery.min.js" type="text/javascript">/script> 
script type="text/javascript"> 
$(function(){ 
$(window).bind('scroll',function(){show()}); 
function show() 
{ 
if($(window).scrollTop()+$(window).height()>=$(document).height()) 
{ 
ajaxRead(); 
} 
} 
function ajaxRead() 
{ 
var html=""; 
$.ajax({ 
type:'get', 
dataType:'jsonp', 
url:'http://api.flickr.com/services/feeds/photos_public.gne?tags=cartagmode=anyformat=jsonjsoncallback=?', 
beforeSend:function(){console.log('loading...')}, 
success:function(data){ 
$.each(data.items,function(i,item){ 
html+='div class="box">'; 
html+='h1>'+item.title+'/h1>'; 
html+='a hreft="'+item.link+'">img src="'+item.media.m+'"/>/a>' 
html+='div>'+item.tags+'/div>'; 
html+='/div>'; 
}); 
$("#resText").append($(html)); 
}, 
complete:function(){console.log('mission acomplete.')} 
}); 
} 
}) 
/script> 
/head> 
body> 
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div id="resText" > 
/div> 
/body> 
/html> 