瀑布流,又稱瀑布流式布局。是比較流行的一種網(wǎng)站頁面布局,視覺表現(xiàn)為參差不齊的多欄布局,隨著頁面滾動(dòng)條向下滾動(dòng),這種布局還會(huì)不斷加載數(shù)據(jù)塊并附加至當(dāng)前尾部。最早采用此布局的網(wǎng)站是Pinterest,逐漸在國內(nèi)流行開來。國內(nèi)大多數(shù)清新站基本為這類風(fēng)格。采用瀑布流布局的網(wǎng)站操作簡單,在瀏覽網(wǎng)站的時(shí)候只需要輕輕滑動(dòng)一下鼠標(biāo)滾輪,一切的美妙的圖片精彩便可呈現(xiàn)在你面前。
瀑布流最實(shí)用于圖片類的網(wǎng)站或者做淘客網(wǎng)站,這樣的功能對(duì)用戶體驗(yàn)極好,也能減少網(wǎng)站的跳出率,對(duì)優(yōu)化也有好處,教大家如何在DedeCMS織夢(mèng)網(wǎng)站中使用這個(gè)功能:
一、找到并打開/plus/list.php文件,在里面找到如下代碼(大概在第12行):
require_once(dirname(__FILE__)."/../include/common.inc.php");
在其下面添加如下代碼:
//列表頁瀑布流無限加載代碼 if(isset($_GET['ajax'])){ $typeid = isset($_GET['typeid']) ? intval($_GET['typeid']): 0;//傳遞過來的分類ID $page = isset($_GET['page']) ? intval($_GET['page']): 0;//頁碼 $pagesize = isset($_GET['pagesize']) ? intval($_GET['pagesize']): 15;//每頁多少條,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)是用于首頁實(shí)現(xiàn)瀑布流加載,因?yàn)槭醉摷虞d數(shù)據(jù)是無需分類的,所以要加以判斷,如果無需 $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(); } |
二、則在需要無限加載的模板引用jquery文件,如果網(wǎng)站模版中沒有引用jquery文件,則引用下面這個(gè)js代碼,也可以把JS下載下來放你的網(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>
三、在模板底部添加如下代碼:
<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>'); arr.push('<dt>'); arr.push('<img src="'+data[i].picname+'">'); arr.push('</dt>'); arr.push('<dd>'); arr.push('<p>'+data[i].title+'</p>'); arr.push('<div>'); arr.push('<span>'); arr.push(data[i].click); arr.push('<em></em>'); arr.push('</span>'); arr.push('</div>'); arr.push('<div>'+data[i].stime+'</div>'); arr.push('</dd>'); arr.push('</dl>'); arr.push('</a>'); } $('.listbox').append(arr.join('')); loadConfig.load_num = rs.load_num; if(total<loadConfig.page*loadConfig.pagesize || loadConfig.page > loadConfig.load_num){ window.removeEventListener('srcoll',loadMoreApply,false); } loadConfig.page++; loadConfig.loading = 0; } } function pullLoad(){ window.addEventListener('scroll', loadMoreApply, false); } pullLoad() checkMobile(); </script> |
1、上面的代碼中的$('.listbox').append(arr.join(''));里的listbox對(duì)應(yīng)模板內(nèi)列表的外框class屬性。
2、arr.push部分對(duì)應(yīng)的是列表中單篇文章的代碼。
3、這樣就可以想要使用瀑布流無線加載了。
4、如果在其它頁調(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的!
四、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){ window.removeEventListener('srcoll',loadMoreApply,false); } |
在判斷語句的最后加上如下代碼:
$('<div style="width:100%; float:left; text-align:center; padding: 10px 0px; color:#fff; background:#00aa98; font-size: 16px;">加載完成</div>').insertAfter('.listbox'); |
加上這段代碼的意思是:當(dāng)文章全部加載完的時(shí)候在所有文章最底部顯示“加載完成”的提示! 在類為“.listbox”的標(biāo)簽下面插入“加載完成”的DIV標(biāo)簽(注意一定要對(duì)應(yīng)替換自己的類名稱)!如圖:
另外在頻道頁,也就是帶多個(gè)下級(jí)子欄目的頻道頁,這個(gè)代碼還有點(diǎn)問題,需要修改plus.php。頻道頁做不到無限加載,是因?yàn)樵谖恼卤砝锩嬷挥凶訖谀?nbsp;typeid 而沒且關(guān)聯(lián)的父欄目 typeid 所以在查詢文章 dede_archives 表的時(shí)候,父欄目 typeid 是沒有對(duì)應(yīng)的文章。所以為了解決這個(gè)問題我在原來的基礎(chǔ)上加了個(gè)判斷,如果當(dāng)傳過來的 typeid 下有子欄目的時(shí)候調(diào)用該欄目下的所以子欄目文章。
下面就把修改后的完整代碼貼出來
if(isset($_GET['ajax'])){ $typeid = isset($_GET['typeid']) ? intval($_GET['typeid']): 0;//傳遞過來的分類ID $page = isset($_GET['page']) ? intval($_GET['page']): 0;//頁碼 $pagesize = isset($_GET['pagesize']) ? intval($_GET['pagesize']): 15;//每頁多少條,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)是用于首頁實(shí)現(xiàn)瀑布流加載,因?yàn)槭醉摷虞d數(shù)據(jù)是無需分類的,所以要加以判斷,如果無需 $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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轉(zhuǎn)載請(qǐng)注明: 織夢(mèng)利用Ajax實(shí)現(xiàn)瀑布流下拉無限加載(不帶點(diǎn)擊加載按鈕)