dedecms Ajax异步获取文章列表

if(isset($_GET['ajax'])){
//传递过来的分类ID
$typeid = isset($_GET['typeid']) ? intval($_GET['typeid']): 0;
//页码
$page = isset($_GET['page']) ? intval($_GET['page']): 0;
//每页多少条,也就是一次加载多少条数据
$pagesize = isset($_GET['pagesize']) ? intval($_GET['pagesize']): 15;
//数据获取的起始位置。即limit条件的第一个参数。
$start = $page>0 ? ($page-1)*$pagesize : 0;
//这个是用于首页实现瀑布流加载,因为首页加载数据是无需分类的,所以要加以判断,如果无需
$typesql = $typeid ? " WHERE typeid=$typeid" : '';
$total_sql = "SELECT COUNT(id) as num FROM `dede_archives` $typesql ";
$temp = $dsql->GetOne($total_sql);
$total = 0;//数据总数
$load_num =0;
if(is_array($temp)){
//要加载的次数,因为默认已经加载了
$load_num= round(($temp['num']-12)/$pagesize);
$total = $temp['num'];
}
$sql = "SELECT a.*,t.typedir,t.typename,t.isdefault,t.defaultname,t.namerule,
t.namerule2,t.ispart, t.moresite,t.siteurl,t.sitepath
FROM `dede_archives` as a JOIN `dede_arctype` AS t ON a.typeid=t.id
$typesql ORDER BY id DESC LIMIT $start,$pagesize";
//echo "$sql";
$dsql->SetQuery($sql);
$dsql->Execute('list');
$statu = 0;//是否有数据,默认没有数据
$data = array();
$index = 0;
while($row = $dsql->GetArray("list")){
$row['info'] = $row['info'] = $row['infos'] = cn_substr($row['description'],160);
$row['id'] = $row['id'];
$row['filename'] = $row['arcurl'] = GetFileUrl($row['id'],$row['typeid'],
$row['senddate'],$row['title'],$row['ismake'],
$row['arcrank'],$row['namerule'],$row['typedir'],$row['money'],
$row['filename'],$row['moresite'],$row['siteurl'],$row['sitepath']);
$row['typeurl'] = GetTypeUrl($row['typeid'],$row['typedir'],
$row['isdefault'],$row['defaultname'],$row['ispart'],
$row['namerule2'],$row['moresite'],$row['siteurl'],$row['sitepath']);
if($row['litpic'] == '-' || $row['litpic'] == ''){
$row['litpic'] = $GLOBALS['cfg_cmspath'].'/images/defaultpic.gif';
}
if(!preg_match("#^http:\/\/#i", $row['litpic']) &&$GLOBALS['cfg_multi_site'] == 'Y'){
$row['litpic'] = $GLOBALS['cfg_mainsite'].$row['litpic'];
}
$row['picname'] = $row['litpic'];//缩略图
$row['stime'] = GetDateMK($row['pubdate']);
$row['typelink'] = "".$row['typename']."";//分类链
$row['fulltitle'] = $row['title'];//完整的标题
$row['shorttitle'] = $row['shorttitle'];//副标题
$row['title'] = cn_substr($row['title'], 60);//截取后的标题
$data[$index] = $row;
$index++;
}
if(!empty($data)){
$statu = 1;//有数据
}
$result =array('statu'=>$statu,'list'=>$data,'total'=>$total,'load_num'=>$load_num);
echo json_encode($result);//返回数据
exit();
}

$(function(){
var loadConfig = {
//请求地址
url_api:'/plus/list.php',
//0就是首页调用数据 列表:typeid:{dede:field name="typeid"/}
typeid:{dede:field name="typeid"/},
page:2, //开始页码
pagesize:2, //需要渲染的数据条数
loading : 0,//加载状态,默认为未加载
}
function loadMoreApply(){
if(loadConfig.loading == 0){
var typeid = loadConfig.typeid;
var page = loadConfig.page;
var pagesize = loadConfig.pagesize;
var url = loadConfig.url_api,data={
ajax:'pullload',
typeid:typeid,
page:page,
pagesize:pagesize
};
function ajax(url, data) {
$.ajax({
url: url,
data:data,
async: false,
type: 'GET',
dataType: 'json',
success: function(data) {
addContent(data);
}
});
}
ajax(url,data);
}
}
function addContent (rs){
if(rs.statu== 1){
var data = rs.list;
var total = rs.total;
var arr=[];
var len = data.length;
var html = '';
for(var i=0;i<len;i++){
html = '<div class="say_out animated bounceIn">'+
'<div class="left my_pic">'+
'<img src="'+data[i].picname+'" width="100" height="100" alt=""/>'+
'</div>'+
'<div class="right my_text">'+
'<p> '+data[i].info+'<span> '+data[i].stime+'</span> '+
' </p>'+
'</div>'+
' <div class="clear"></div>'+
'</div>';
}
arr.push(html);
$('#a_say').append(html);
loadConfig.load_num = rs.load_num;
if(total loadConfig.load_num){
console.log("没有数据了");
loadConfig.loading=1;
return false;
}
loadConfig.page++;
loadConfig.loading = 0;
}
}
$(window).scroll(function(){
//获取当前文档的高度
var docHeight = $(document).height();
//获取当前滚动条的高度
var scrollTop = $(this).scrollTop();
//获取当前可视区的高度
var height = $(this).height();
if((docHeight-scrollTop-height)<=20){
loadMoreApply();
}
});
});