Dede利用ajax无限加载文章

很多用织梦dedecms做图片类的网站都需要用到无限加载这个功能，这个功能需要用到ajax，下面我就告诉大家如何实现这样的功能。

首先找到并打开/plus/list.php文件，在里面找到如下代码：

require_once(dirname(__FILE__)."/../include/common.inc.php");

在其下面添加如下代码：

if(isset($_GET['ajax'])){
$typeid = isset($_GET['typeid']) ? intval($_GET['typeid']): 0;//传递过来的分类ID
$page = isset($_GET['page']) ? intval($_GET['page']): 0;//页码
$pagesize = isset($_GET['pagesize']) ? intval($_GET['pagesize']): 15;//每页多少条，也就是一次加载多少条数据
$start = $page>0 ? ($page-1)*$pagesize : 0;//数据获取的起始位置。即limit条件的第一个参数。
$typesql = $typeid ? " WHERE typeid=$typeid" : '';//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
$total_sql = "SELECT COUNT(id) as num FROM `tufei_archives`  $typesql ";
$temp = $dsql->GetOne($total_sql);
$total = 0;//数据总数
$load_num =0;
if(is_array($temp)){
$load_num= round(($temp['num']-15)/$pagesize);//要加载的次数,因为默认已经加载了
$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 `tufei_archives` as a JOIN `tufei_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']);
$row['typelink'] = "<a href='".$row['typeurl']."'>".$row['typename']."</a>";//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();
}

然后在需要使用无线加载的模板里引用下面这个js代码：

并在底部添加如下代码：

<script type="text/javascript">

var loadConfig = {

url_api:'/plus/list.php',

typeid:0,

page:2,

pagesize:3,

loading : 0,

}

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};

var sTop = document.body.scrollTop || document.documentElement.scrollTop, dHeight = $(document).height(), cHeight = document.documentElement.clientHeight;

console.log(dHeight);

if (sTop + cHeight >= dHeight - cHeight) {

loadConfig.loading = 1;

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 length = data.length;

for(var i=0;i<length;i++){

arr.push('<a href="'+data[i].arcurl+'">');

arr.push('<div class="item">');

arr.push('<div class="thumbnail">');

arr.push('<img class="img-responsive" src="'+data[i].picname+'" width=460 height=255 />');

arr.push('</div>');

arr.push('<div class="caption">');

arr.push('<h3>'+data[i].title+'</h3>');

arr.push('<div class="place">'+data[i].shorttitle+'</div>');

arr.push('</div>');

arr.push('</div>');

arr.push('</a>');

}

$('.data-list').append(arr.join(''));

loadConfig.load_num = rs.load_num;

if(total<loadConfig.page*loadConfig.pagesize || loadConfig.page > loadConfig.load_num){

window.removeEventListener('srcoll',loadMoreApply,false);

}

loadConfig.page++;

loadConfig.loading = 0;

}

}

function pullLoad(){

window.addEventListener('scroll', loadMoreApply, false);

}

pullLoad()

checkMobile();

</script>

上面的代码中的”$('.data-list').append(arr.join(''));“里的”data-list“对应模板内列表的外框class属性。

arr.push部分对应的是列表代码，

这样就可以使用无线加载了。

如果在列表页只需把代码中的”typeid:0,“ 修改为”typeid:{dede:field name="typeid"/},“即可。

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