ajax瀑布流分页

r囧r小猫 2022-07-16 07:10 131阅读 0赞

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
     <html xmlns="http://www.w3.org/1999/xhtml">
     <head>
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
     <title>瀑布流-Derek</title>
     <script type="text/javascript" language="javascript" src="jquery.js"></script>
     <link type="text/css" rel="stylesheet" href="waterfall.css" />
     <script type="text/javascript" language="javascript" src="waterfall.js"></script>
     </head>
     <body>
    
         <ul id="stage">
             <li></li>
             <li></li>
             <li></li>
             <li></li>
         </ul>
    
     </body>
     </html>
    /* * Javascript文件：waterfall.js */
    $(function(){ 
         jsonajax();
     });
    
     //这里就要进行计算滚动条当前所在的位置了。如果滚动条离最底部还有100px的时候就要进行调用ajax加载数据
     $(window).scroll(function(){     
         //此方法是在滚动条滚动时发生的函数
         // 当滚动到最底部以上100像素时，加载新内容
         var $doc_height,$s_top,$now_height;
         $doc_height = $(document).height();        //这里是document的整个高度
         $s_top = $(this).scrollTop();            //当前滚动条离最顶上多少高度
         $now_height = $(this).height();            //这里的this 也是就是window对象
         if(($doc_height - $s_top - $now_height) < 100) jsonajax();    
     });
    
    
     //做一个ajax方法来请求data.php不断的获取数据
     var $num = 0;
     function jsonajax(){ 
    
         $.ajax({
             url:'data.php',
             type:'POST',
             data:"num="+$num++,
             dataType:'json',
             success:function(json){ 
                 if(typeof json == 'object'){
                     var neirou,$row,iheight,temp_h;
                     for(var i=0,l=json.length;i<l;i++){
                         neirou = json[i];    //当前层数据
                         //找了高度最少的列做添加新内容
                         iheight  =  -1;
                         $("#stage li").each(function(){ 
                             //得到当前li的高度
                             temp_h = Number($(this).height());
                             if(iheight == -1 || iheight >temp_h){
                                 iheight = temp_h;
                                 $row = $(this); //此时$row是li对象了
                             }
                         });
                         $item = $('<div><img src="'+neirou.img+'" border="0" ><br/>'+neirou.title+'</div>').hide();
                         $row.append($item);
                         $item.fadeIn();
                     }
                 }
             }
         });
     }
    
    /* * CSS文件：waterfall.css */
    
    body{text-align:center;}
    /*Download by http://www.codefans.net*/
    #stage{ margin:0 auto; padding:0; width:880px; }
    #stage li{ margin:0; padding:0; list-style:none;float:left; width:220px;}
    #stage li div{ font-size:12px; padding:10px; color:#999999; text-align:left; }
    
    
    /* * php文件：data.php */
    <?php
     $link = mysql_connect("localhost","root","");
     $sql = "use waterfall";
     mysql_query($sql,$link);
     $sql = "set names utf8";
     mysql_query($sql,$link);
     $num = $_POST['num'] *10;
     if($_POST['num'] != 0) $num +1;
     $sql = "select img,title from content limit ".$num.",10";
     $result = mysql_query($sql,$link);
     $temp_arr = array();
     while($row = mysql_fetch_assoc($result)){
         $temp_arr[] = $row;
     }
     $json_arr = array();
     foreach($temp_arr as $k=>$v){
         $json_arr[]  = (object)$v;
     }
     //print_r($json_arr);
     echo json_encode( $json_arr );