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dedecms利用ajax實(shí)現(xiàn)瀑布流下拉無(wú)限加載的教程jquery

時(shí)間: 2018-12-01 10:11 閱讀: 作者:素材無(wú)憂網(wǎng)

織夢(mèng)dedecms用來(lái)做圖片類的網(wǎng)站或者做淘客網(wǎng)站很多都需要用到無(wú)限加載這個(gè)功能,這個(gè)功能需要用到ajax,下面教大家如何實(shí)現(xiàn)無(wú)限加載的瀑布流功能。

 

首先找到并打開(kāi)/plus/list.php文件,在里面找到如下代碼:
require_once(dirname(__FILE__)."/../include/common.inc.php");

 

在其下面添加如下代碼:
if(isset($_GET['ajax'])){
    $typeid = isset($_GET['typeid']) ? intval($_GET['typeid']): 0;//傳遞過(guò)來(lái)的分類ID
    $page = isset($_GET['page']) ? intval($_GET['page']): 0;//頁(yè)碼
    $pagesize = isset($_GET['pagesize']) ? intval($_GET['pagesize']): 15;//每頁(yè)多少條,也就是一次加載多少條數(shù)據(jù)
    $start = $page>0 ? ($page-1)*$pagesize : 0;//數(shù)據(jù)獲取的起始位置。即limit條件的第一個(gè)參數(shù)。
    $typesql = $typeid ? " WHERE typeid=$typeid" : '';//這個(gè)是用于首頁(yè)實(shí)現(xiàn)瀑布流加載,因?yàn)槭醉?yè)加載數(shù)據(jù)是無(wú)需分類的,所以要加以判斷,如果無(wú)需
    $total_sql = "SELECT COUNT(id) as num FROM `dede_archives` $typesql ";
    $temp = $dsql->GetOne($total_sql);
    $total = 0;//數(shù)據(jù)總數(shù)
    $load_num =0;
    if(is_array($temp)){
        $load_num= round(($temp['num']-15)/$pagesize);//要加載的次數(shù),因?yàn)槟J(rèn)已經(jīng)加載了
        $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";
    $dsql->SetQuery($sql);
    $dsql->Execute('list');
    $statu = 0;//是否有數(shù)據(jù),默認(rèn)沒(méi)有數(shù)據(jù)
    $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'] = $row['litpic'];//縮略圖
        //$row['stime'] = GetDateMK($row['pubdate']);
        $row['stime'] = date('Y-m-d H:i', $row['pubdate']);
        $row['click'] = $row['click'];
        $row['typelink'] = "".$row['typename']."";//分類鏈
        $row['fulltitle'] = $row['title'];//完整的標(biāo)題
        $row['shorttitle'] = $row['shorttitle'];//副標(biāo)題
        $row['title'] = cn_substr($row['title'], 80);//截取后的標(biāo)題
        $data[$index] = $row;
        $index++;
    }
    if(!empty($data)){
        $statu = 1;//有數(shù)據(jù)
    }
    $result =array('statu'=>$statu,'list'=>$data,'total'=>$total,'load_num'=>$load_num);
    echo json_encode($result);//返回?cái)?shù)據(jù)
    exit();
}


在需要無(wú)限加載的模板里引用下面這個(gè)js代碼,也可以把JS下載下來(lái)放你的網(wǎng)站加載,這里使用百度的外鏈,節(jié)省資源:
 

<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>


 

并在模板底部添加如下代碼:
&nbsp;


<script type="text/javascript">
var loadConfig = {
    url_api:'/plus/list.php',
    typeid:{dede:field name="typeid"/},
    page:2,
    pagesize:15,  //這個(gè)就是滑動(dòng)一次添加幾條信息的參數(shù)設(shè)置
    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+'" title="'+data[i].title+'">');
   arr.push('<dl class="yz_card">');
   arr.push('<dt class="yz_card_dt">');
   arr.push('<img src="'+data[i].picname+'" alt="'+data[i].title+'">');
   arr.push('</dt>');
   arr.push('<dd class="yz_card_dd">');
   arr.push('<p class="yz_card_p">'+data[i].title+'</p>');
   arr.push('<div class="yz_card_icon">');
   arr.push('<span class="yz_comment">');
   arr.push(data[i].click);      
   arr.push('<em class="yz_icon_comment"><img src="/templets/default/images/pingluan.png" height="14"></em>');
   arr.push('</span>');
   arr.push('</div>');
   arr.push('<div class="yz_datetime">'+data[i].stime+'</div>');
   arr.push('</dd>');
   arr.push('</dl>');
   arr.push('</a>');
  }
  $('.yz_xinwen').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>
 
上面的代碼中的$('.yz_xinwen').append(arr.join(''));里的yz_xinwen對(duì)應(yīng)模板內(nèi)列表的外框class屬性。
    arr.push部分對(duì)應(yīng)的是列表中單篇文章的代碼。
    這樣就可以想要使用瀑布流無(wú)線加載了。
    如果在其它頁(yè)調(diào)用的話只需把代碼中的typeid:{dede:field name="typeid"/} 修改為typeid:5(5 就是我們要調(diào)用文章的欄目ID)即可。
   
    注意:很多人在調(diào)試這個(gè)功能的時(shí)候可能把標(biāo)簽寫成了{(lán)dede:list pagesize='10'}{/dede:list} 要用{dede:arclist row="15"}{/dede:arclist}才可以,不然文章是加載不出來(lái)的!
    

    基于有些網(wǎng)友的需求添加了“加載完成”的提示! 找到如下代碼
if(total<loadConfig.page*loadConfig.pagesize || loadConfig.page > loadConfig.load_num){

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }


    在判斷語(yǔ)句的最后加上如下代碼!
$('<div style="width:100%; float:left; text-align:center; padding: 10px 0px; color:#fff; background:#00aa98; font-size: 16px;">加載完成</div>').insertAfter('.yz_xinwen');



   加上這段代碼的意思是:當(dāng)文章全部加載完的時(shí)候在所有文章最底部顯示“加載完成”的提示! 代碼的意思是:在類為“.yz_xinwen”的標(biāo)簽下面插入 “加載完成”的DIV標(biāo)簽!如圖:
 







另外在頻道頁(yè),也就是帶多個(gè)下級(jí)子欄目的頻道頁(yè),這個(gè)代碼還有點(diǎn)問(wèn)題,需要修改plus.php.頻道頁(yè)做不到無(wú)限加載,是因?yàn)樵谖恼卤砝锩嬷挥凶訖谀?typeid 而沒(méi)且關(guān)聯(lián)的父欄目 typeid 所以在查詢文章 dede_archives 表的時(shí)候,父欄目 typeid 是沒(méi)有對(duì)應(yīng)的文章。所以為了解決這個(gè)問(wèn)題我在原來(lái)的基礎(chǔ)上加了個(gè)判斷,如果當(dāng)傳過(guò)來(lái)的 typeid 下有子欄目的時(shí)候調(diào)用該欄目下的所以子欄目文章。


下面我就把修改后的完整代碼貼出來(lái)。

if(isset($_GET['ajax'])){

    $typeid = isset($_GET['typeid']) ? intval($_GET['typeid']): 0;//傳遞過(guò)來(lái)的分類ID

    $page = isset($_GET['page']) ? intval($_GET['page']): 0;//頁(yè)碼

    $pagesize = isset($_GET['pagesize']) ? intval($_GET['pagesize']): 15;//每頁(yè)多少條,也就是一次加載多少條數(shù)據(jù)

    $start = $page>0 ? ($page-1)*$pagesize : 0;//數(shù)據(jù)獲取的起始位置。即limit條件的第一個(gè)參數(shù)。

    //獲取頻道欄目下的子欄目ID

    $yz_typeid = $dsql->GetOne("SELECT COUNT(id) as num FROM `dede_arctype` WHERE reid=$typeid ");

    if($yz_typeid['num']!=0){

        $sql = "SELECT * FROM `dede_arctype` WHERE reid=$typeid";

        $dsql->SetQuery($sql);

        $dsql->Execute('yz_id');

        $typepdid = "";

        $yz = 1;

         while($row = $dsql->GetArray("yz_id")){

             if($yz_typeid['num'] == $yz){

                $typepdid .= "(typeid=".$row['id'].")";

            }else{

                 $typepdid .= "(typeid=".$row['id'].") or ";

                $yz += 1;

            }

         }

        // echo $yz_typeid['num']."+++".$typepdid;

         //exit();

    }else {

        $typepdid = "typeid=$typeid";

    }

    $typesql = $typeid ? " WHERE $typepdid" : '';//這個(gè)是用于首頁(yè)實(shí)現(xiàn)瀑布流加載,因?yàn)槭醉?yè)加載數(shù)據(jù)是無(wú)需分類的,所以要加以判斷,如果無(wú)需

    $total_sql = "SELECT COUNT(id) as num FROM `dede_archives` $typesql ";

    $temp = $dsql->GetOne($total_sql);

    $total = 0;//數(shù)據(jù)總數(shù)

    $load_num =0;

    if(is_array($temp)){

        $load_num= round(($temp['num']-15)/$pagesize);//要加載的次數(shù),因?yàn)槟J(rèn)已經(jīng)加載了

        $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";

    $dsql->SetQuery($sql);

    $dsql->Execute('list');

    $statu = 0;//是否有數(shù)據(jù),默認(rèn)沒(méi)有數(shù)據(jù)

    $data = array();

    $index = 0;

    while($row = $dsql->GetArray("list")){

        $row['description'] = cn_substr($row['description'],90);

        $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']);

        $row['waparcurl'] = preg_replace("(.*/m/)","/",$row['arcurl']);

        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'];//縮略圖

        //$row['stime'] = GetDateMK($row['pubdate']);

        $row['stime'] = date('Y-m-d H:i', $row['pubdate']);

        $row['click'] = $row['click'];

        $row['typelink'] = "".$row['typename']."";//分類鏈

        $row['fulltitle'] = $row['title'];//完整的標(biāo)題

        $row['shorttitle'] = $row['shorttitle'];//副標(biāo)題

        $row['title'] = cn_substr($row['title'], 80);//截取后的標(biāo)題

        $data[$index] = $row;

        $index++;

    }

    if(!empty($data)){

        $statu = 1;//有數(shù)據(jù)

    }

    $result =array('statu'=>$statu,'list'=>$data,'total'=>$total,'load_num'=>$load_num);

    echo json_encode($result);//返回?cái)?shù)據(jù)

    exit();

}

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