loadmore

实例点击

loadmore.js

/*
*  loadmore.js require jQuery,artTemplate
*  Butterfly 2013.08.28
*/
define(['../utils/artTemplate'], function(template){

'use strict';

    var defaults = {
        API: 'http://www.1905.com/api/vod/vod_showtheme.php?id=684444',
        startIndex: 0,
        returnLength: 15,
        threshold: 100,        // Number 距离底部多少距离开始加载
        loader: 'loading'     //加载指示元素ID 
    };

    var doc = document,
        html='',
        isLoading = false,

    closeToBottom = function(threshold) {
        return $(window).scrollTop() + $(window).height() > $(doc).height() - threshold
    },
    
    loadMore = function( target, options ){
        var o = $.extend( defaults, options ),
            $target = $(target),
            $loader = $('#' + o.loader);
        if ( ! isLoading && closeToBottom( o.threshold ) ) {
            isLoading = ! isLoading;
            $loader.show();
            $.ajax({
                url: o.API,
                data: {
                    s: o.startIndex,
                    n: o.returnLength
                },
                dataType: 'jsonp',
                success: function (data) {
                    if (data && data.length) {
                        data.forEach(function( item, index ){
                            html = template( o.tpl, item );
                            var $item = $(html).css('transition', '400ms').appendTo( $target );
                            setTimeout(function(){
                                $item.addClass('fadeIn');
                            }, 100*index);
                        })
                        //$target.append(html)
                        if ( data.length == o.returnLength ) isLoading = ! isLoading;
                    } else {
                    }
                    $loader.hide();
                }
            });
            defaults.startIndex += o.returnLength;
        }
    };

    return function( target, options ) {
        loadMore( target, options );
        $(window).on('resize scroll load', M1905.fn.throttle( function(){
            loadMore(target)
        }, 200 ) );
    }

});

2) 在js中配置：

var beginTime = +new Date,
     disableCache = ($.browser.msie && $.browser.version == 10),
     fresh = disableCache ? ('?t=' + beginTime) : '';

   //加载更多
    M.use('http://js.static.m1905.cn/ui/loadmore.js' + fresh, function (loadmore) {
        loadmore( $('.mod-relate').find('.mod-bd'), {
            API: 'http://www1.1905.com/api/special/tfsj.php?keywords='+ encodeURIComponent(SPECIALCONFIG.keywords),
            startIndex: 3,        //页面刷新时加载的数据条数
            returnLength: 3,      //每次加载的数据条数
            threshold: 100,       // Number 距离底部多少距离开始加载
            loader: 'loading',
            tpl: 'theme_list_tpl'   //模版ID
        })
    });

 

3) 在页面内后台先循环几条，然后写入模板

 <!-- 加载更多模板 START-->
        <div class="loading-box" id="loading"><i></i>正在加载</div>
        <script type="text/javascript">
          if(mid == 6){
                <div class="bd video clearfix">
          }else{
                <div class="bd clearfix">
          }
        </script>
        <script id="theme_list_tpl" type="text/tpl">
          <% if (mid==6) {%> <div class="bd video clearfix"> <% }else {%><div class="bd clearfix"><%}%>
             <a href="http://www.1905.com/<%=url%>" target="_blank" class="fl"> 
                <img src="<%=thumb%>" height="150" width="200"> <i class="icon"></i> 
             </a>
             <div class="r-news fr"> 
                 <a href="http://www.1905.com/<%=url%>" target="_blank" class="r-title"><%=title%></a> 
                 <span class="r-date"><%=date%></span> 
                 <a href="http://www.1905.com/<%=url%>" target="_blank" class="r-sum"><%=description%></a>
              </div>
          </div>
        </script>
        <!-- 加载更多模板 END-->

4) 在控制台中看请求：

s的值在依次累加   取值为 每次滑动的时候从哪条数据开始加载