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  • 织梦模板DEDE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,修正后分享给大家。
    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.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("#^ 链接, $row['litpic']) &&$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();
    }

    模板文件增加内容
    在需要用AJAX异步加载的模板的</head>前增加代码

    <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<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

    查看源码打印代码帮助

    <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 -->

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