很多用织梦dedecms做图片类的网站都需要用到无限加载这个功能,这个功能需要用到ajax,下面我就告诉大家如何实现这样的功能。
首先找到并打开/plus/list.php文件,在里面找到如下代码:
- require_once(dirname(__FILE__)."/../include/common.inc.php");
在其下面添加如下代码:
- 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 `tufei_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 `tufei_archives` as a JOIN `tufei_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();
- }
然后在需要使用无线加载的模板里引用下面这个js代码:
- <script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
并在底部添加如下代码:
- <script type="text/javascript">
- var loadConfig = {
- url_api:'/plus/list.php',
- 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('<a href="'+data[i].arcurl+'">');
- arr.push('<div class="item">');
- arr.push('<div class="thumbnail">');
- arr.push('<img class="img-responsive" src="'+data[i].picname+'" width=460 height=255 />');
- arr.push('</div>');
- arr.push('<div class="caption">');
- arr.push('<h3>'+data[i].title+'</h3>');
- arr.push('<div class="place">'+data[i].shorttitle+'</div>');
- arr.push('</div>');
- arr.push('</div>');
- arr.push('</a>');
- }
- $('.data-list').append(arr.join(''));
- loadConfig.load_num = rs.load_num;
- if(total<loadConfig.page*loadConfig.pagesize || loadConfig.page > loadConfig.load_num){
- window.removeEventListener('srcoll',loadMoreApply,false);
- }
- loadConfig.page++;
- loadConfig.loading = 0;
- }
- }
- function pullLoad(){
- window.addEventListener('scroll', loadMoreApply, false);
- }
- pullLoad()
- checkMobile();
- </script>
上面的代码中的”$('.data-list').append(arr.join(''));“里的”data-list“对应模板内列表的外框class属性。
arr.push部分对应的是列表代码,
这样就可以使用无线加载了。
如果在列表页只需把代码中的”typeid:0,“ 修改为”typeid:{dede:field name="typeid"/},“即可。
联系客服