Dede利用ajax无限加载文章
很多用企业建站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'].'inc/pic/1-1F5301S915S8.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:
- < script src = "inc/js/jquery.js" > </ script >
 
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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