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织梦DedeCMS模板织梦DedeCMS首页列表页AJAX无限加载瀑布流修正版

最近在学javascript,才慢慢开始读懂JS代码。对HTML前台AJAX加载技术研究了一番,像博客站或者图片站运用AJAX异步无限加载,做成瀑布流,提高用户体验,这是AJAX异步加载的优点。
AJAX异步加载的弊端:属于WEB前端技术,蜘蛛不会抓JS调用的内容,也就是并不利于SEO优化。所以要运用这个功能的话最好有一部分直接调用,另一部分采用AJAX异步加载。
接下来用织梦来做AJAX异步加载WEB前端开发。网上有诸多教程,经过笔者整理,给出详细说明,修正后分享给大伙。
打开/plus/list.php,找到
require_once(dirname(__FILE__).”/../include/common.inc.php”);
下面增加代码

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 `dede_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.sitepathFROM `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.jpg';}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'] = "https://www.liuzhongwei.com/a/dedejq/".$row['typename']."";//分类链$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();}


模板文件增加内容
在需要用AJAX异步加载的模板的前增加代码

var loadConfig = {url_api:'{dede:global.cfg_cmspath/}/plus/list.php', //修正plus目录typeid:{dede:field name='typeid'/}, //首页此处是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('
  • ');arr.push('');arr.push('');arr.push('');arr.push('['+data[i].typelink+']');arr.push(''+data[i].title+'');arr.push('
  • ');}$('.data-list').append(arr.join(''));loadConfig.load_num = rs.load_num;if(total loadConfig.load_num){window.removeEventListener('srcoll',loadMoreApply,false);}loadConfig.page++;loadConfig.loading = 0;}}function pullLoad(){window.addEventListener('scroll', loadMoreApply, false);}pullLoad();


    首页HTML代码示例
    注意:首页模板用arclist标签,用row=’3’是初始化调用的3条;列表模板用list标签,用pagesize=’3’。模板里面的
      {dede:arclist row=’3′}
    • [field:array runphp=’yes’]@me = (empty(@me[‘litpic’]) ? “” : ““); [/field:array][[field:typelink/]] [field:title/] 日期:[field:pubdate function=”GetDateTimeMK(@me)”/] 点击:[field:click/] 好评:[field:scores/]

      [field:description/]…

      织梦DedeCMS模板织梦DedeCMS首页列表页AJAX无限加载瀑布流修正版
    • {/dede:arclist}



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