php实现网页上一页下一页翻页过程详解(2)

<div class="page text-center">
 <ul class="pagination" id="page">
  <li data-i="0" id="index" class="<?php if ($cPage==0) echo 'disabled'; ?>"><a href="listmore.php?cPage=0">«首页</a></li>
  <li data-i="1" class="<?php if ($cPage==0) echo 'disabled';?>"><a href="listmore.php?cPage=<?php echo $cPage>0?$cPage-1:0?>"><上一页</a></li>
  <li data-i="2" class="<?php if ($cPage==$pages-1) echo 'disabled'?>"><a href="listmore.php?cPage=<?php echo $cPage==($pages-1)?$pages-1:$cPage+1?>">下一页></a></li>
  <li data-i="3" id="end" class="<?php if ($cPage==$pages-1) echo 'disabled'?>"><a href="listmore.php?cPage=<?php echo $pages-1?>">尾页»</a></li>
  <li class="disabled">
    <a href="##" id="total"><?php echo ($cPage+1)?>/<?php echo "$pages"?></a>
  </li>
  </ul>
</div>

 <div class="panel-body" id="content">
    <ul id="list" class="media-list">  
     </ul>
  </div>
  <div class="page text-center">
     <ul class="pagination" id="page">
       <li data-i="0" id="index" class="disabled"><a href="##">«首页</a></li>
       <li data-i="1" class="disabled"><a href="##"><上一页</a></li>
       <li data-i="2"><a href="##">下一页></a></li>
       <li data-i="3" id="end"><a href="##">尾页»</a></li>
       <li class="disabled">
         <a href="##" id="total"></a>
       </li>
     </ul>
   </div>
   <template id="temp">     //引用模板
    <li class="media">
      <a href="detail.html?id={id}">
        <img class="pull-left" src="{src}">
        <figcaption>
          <h4><span class="title">{title}</span> <span class="news-date">{date}</span></h4>
  
          <p>{content}</p>
         </figcaption>
        </a>
      </li>
    </template>

 var html=$('#temp').html();
  var curPage=0,pages=0;
  $.getJSON('php/pages.php',function (res) {
    pages=Math.ceil(res/4);/*获取信息的总页数*/
  });
  function show(cPage){//替换每一页的内容
    $.getJSON('php/listmore.php',{cPage:cPage},function (json) {
      var str='';
      $('#list').empty();
      json.forEach(function (el) {
        str+=html.replace('{id}',el.id).replace('{title}',el.title).replace('{src}',el.src)
          .replace('{content}',el.content).replace('{date}',el.time);
      });
      $('#list').html(str);
    });
    $('#total').html((curPage+1)+'/'+pages);
  }
  setTimeout(function () {
    show(0);
  },100);
  $('#page').on('click','li',function () {//上下翻页，翻遍当前页的值
    var i=$(this).data('i');//jquery里特有的获取data-*属性的方法
    switch (i){
      case 0:curPage=0;break;
      case 1:curPage>0?curPage--:0;break;
      case 2:curPage<(pages-1)?curPage++:pages-1;break;
      case 3:curPage=pages-1;break;
    }
    show(curPage);
    disabled(curPage);
  })
  function disabled(curPage) {//关于临界值禁止选择
    if (curPage==0){/*当前页为第一页，首页和上一页选项禁止点击*/
      $('#index').addClass('disabled').next().addClass('disabled');
      $('#end').removeClass('disabled').prev().removeClass('disabled');
    } else if (curPage==pages-1){
      $('#index').removeClass('disabled').next().removeClass('disabled');
      $('#end').addClass('disabled').prev().addClass('disabled');
    } else {/*当前页为最后一页，尾页和下一页选项禁止点击*/
      $('#index').removeClass('disabled').next().removeClass('disabled');
      $('#end').removeClass('disabled').prev().removeClass('disabled');
    }
  }