名站网址导航为大驾家提供DedeCMS站点程序站点教程相关的知识,比如织梦程序安装教程,织梦程序系统故障等教程。最近在学javascript,才慢慢开始读懂JS相关具体代码如下。对hTML网站的前台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具体调用的网站内容,也就是并不利于网站seo优化优化。所以要运用这个功能的话最好有一部分直接具体调用,另一部分采用AJAX异步加载。
接下来用织梦程序来做AJAX异步加载WEB前端网站开发。网上有诸多教程,经过笔者整理,给出详细说明,修正后分享给大驾家。
打开/plus/list.php,找到
require_once(dirname(__FILE__)."/../include/common.inc.php");
下面增加相关具体代码如下
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.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']); $row['typelink'] = "<a href='".$row['typeurl']."'>".$row['typename']."</a>";//分类链 $row['fulltitle'] = $row['title'];//完整的文章标题 $row['shorttitle'] = $row['shorttitle'];//副文章标题 $row['title'] = cn_substr($row['title'], 60);//截取后的文章标题 $data[$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(); } |
模板网站文件增加网站内容
在需要用AJAX异步加载的模板的</head>前增加相关具体代码如下
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script> <script type="text/javascript"> 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('<li>'); arr.push('<a href="' data[i].arcurl '" class="preview">'); arr.push('<img class="" width="" height="" alt="data[i].title" src="' data[i].picname '" />'); arr.push('</a>'); arr.push('[<b>' data[i].typelink '</b>]'); arr.push('<a href="' data[i].arcurl '" class="title">' data[i].title '</a>'); arr.push('</li>'); } $('.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(); </script> |
首页hTML相关具体代码如下示例
注意:首页模板用arclist标签,用row='3'是初始化具体调用的3条;站点列表模板用list标签,用pagesize='3'。模板里面的<div class="data-list“>与js里面的data-list对应,需要把循环部分全部包裹起来
查看源码打印相关具体代码如下帮助
<div class="listbox"> <ul class="e2"> <div class="data-list"> {dede:arclist row='3'} <li> [field:array runphp='yes']@me = (empty(@me['litpic']) ? "" : "<a href='{@me['arcurl']}' class='preview'><img src='{@me['litpic']}'/></a>"); [/field:array] [<b>[field:typelink/]</b>] <a href="[field:arcurl/]" class="title">[field:title/]</a> <span class="info"> <small>日期:</small>[field:pubdate function="GetDateTimeMK(@me)"/] <small>点击:</small>[field:click/] <small>好评:</small>[field:scores/] </span> <p class="intro"> [field:description/]... </p> </li> {/dede:arclist} </div><!--data-list--> </ul> </div> <!-- /listbox --> |
关于DedeCMS站点程序站点教程相关的知识,就说到这里了希望能帮助朋友们。织梦程序DEDECMS移动端适配URL优化str_replace系统数据库函数替换多个网站内容