juqery 下拉加载数据

html  代码  一开始是需要显示的第一页

<div class="hot-product f15 fixed-Width clearfix" id="goods2">
        <volist name="goods" id="goods_vo">
            <div class="item2">
                <div class="H_shangpin" style="background: url('{$goods_vo['banner'][0]}') no-repeat center ;background-size: contain"></div>
                <div class="item3">
                    <p class="H_xianzhi">【{$goods_vo['fenlei']}】{$goods_vo['title']}</p>
                    <p class="color-red">
                        <span>￥{$goods_vo['pay']}</span>
                        <i class="color-b5 h_commodity fr"><del>￥{$goods_vo['yuan_pay']}</del></i>
                    </p>
                    <div class="clearfix shangpinming">
                        <p class="color-b5 h_commodity fl"><span>{$goods_vo['weizhi']}</span><span>{$goods_vo['shang_name']}</span></p>
                        <p class="fr color-b5  h_commodity ">{$goods_vo['time']}</p>
                    </div>
                </div>
            </div>
        </volist>
    </div>

自动监听下拉，当往下拉的时候就开始访问你指定的控制器

/*下拉分页*/
    var nextp = "{$nextp}";//第几页
    var oknext = 1;//加载开关
    $(window).scroll(function () {
        var di = $(window).scrollTop();//获取当前滚动条的位置
        var ph = $(window).height();//当前窗口高度
        di = di + ph;//最高拉到多少
        var h = $(document).height();//允许多长滚动条
        if (h - di < 100) {
            if (nextp > 0 && oknext == 1) {
                oknext = 0;
                $.post("{:U('Index/goods')}", {p:nextp}, function (v) {//指定访问的控制器
                    if(v.index == 2){//这里我是做了一个判断，当需要一排显示两个就走if  当需要一排显示一个的时候就走else
                        if (v.status) {
                            oknext = 1;
                            nextp = v.nextp;
                            var list = v.list;
                            //console.log(list);
                            var html = '';
                            for (var i = 0; i < list.length; i++) {
                                html +='<div class="item2">'+
                                        '<div class="H_shangpin" style="background: url('+list[i]['banner'][0]+') no-repeat center ;background-size: contain"></div>'+
                                          '<div class="item3"><p class="H_xianzhi">【'+list[i]['fenlei']+'】'+list[i]['title']+'</p>'+
                                            '<p class="color-red"><span>￥'+list[i]['pay']+'</span>'+
                                              '<i class="color-b5 h_commodity fr"><del>￥'+list[i]['yuan_pay']+'</del></i>'+
                                            '</p>'+
                                            '<div class="clearfix shangpinming">'+
                                              '<p class="color-b5 h_commodity fl"><span>'+list[i]['weizhi']+'</span><span>'+list[i]['shang_name']+'</span></p>'+
                                              '<p class="fr color-b5  h_commodity ">'+list[i]['time']+'</p>'+
                                            '</div>'+
                                           '</div>'+
                                        '</div>';
                                
                            }
                            $("#goods2").append(html);
                        }
                    }else{
                        if (v.status) {
                            oknext = 1;
                            nextp = v.nextp;
                            var list = v.list;
                            var html = '';
                            for (var i = 0; i < list.length; i++) {
                                html +='<div class="clearfix H2_pad">'+
                                            '<div class="H2_shangpin fl" style="background: url('+list[i]['banner'][0]+') no-repeat center ;background-size: cover"></div>'+
                                            '<div class="H2_xinxi fl">'+
                                                '<div class="H2_xianzhi">【'+list[i]['fenlei']+'】'+list[i]['title']+'</div>'+
                                                '<div><span class="color-red">￥'+list[i]['pay']+'</span><span class="color-b5 h_commodity fr">'+list[i]['time']+'</span>'+
                                                '</div>'+
                                                '<div class="color-b5 h_commodity">'+
                                                    '<del>￥'+list[i]['yuan_pay']+'</del> <span class="fr"><i class="ICON-tousu h_tousu"></i>'+
                                                    '<i class="ICON-fen-LOVE '+list[i]['love']+'" data-guanzhu-id="'+list[i]['id']+',2"></i> </span>'+
                                                '</div>'+
                                            '</div>'+
                                        '</div>'
                            }
                            $("#goods1").append(html);
                        }
                    }
                    
                }, 'json');

            }

        }
    });

控制器方法

/*
    **全部商品
    **
    ***/
    public function goods(){
        $p = I('p',1);
        $where['status'] = 1;
        if(I('id') != 0){
            $where['fenlei_id'] = I('id');
        }
        $this->index = M('xinxi_goods_if')->getField('index');//首页商品显示问题 单排显示1  还是双排显示2
        $count = M('xinxi_goods')->where($where)->count();
        $goods = M('xinxi_goods')->where($where)->field('id,title,ben_fenlei_id,uid,weizhi_id,yuan_pay,pay,banner,time,num,admin_user')->order('time DESC')->page($p,6)->select();
        $nextpage=$count/6>$p?$p+1:'';
        if($p == 1){//第一页的时候显示页面并显示第一个的数据
            $this->nextp=$nextpage;
            foreach($goods as $k=>$r){
                $goods[$k]['time'] = get_date($r['time']);
                $goods[$k]['banner'] = explode(',',$r['banner']);
                /*商铺店名*/
                if(!$r['uid']){
                    $goods[$k]['shang_name'] = $r['admin_user'];
                }else{
                    $name = get_yonghu($r['uid'],'shang_name');
                    if(!$name){
                        $goods[$k]['shang_name'] = '';
                    }else{
                        $goods[$k]['shang_name'] = $name;
                    }
                }
                /*商品分类*/
                $goods[$k]['fenlei'] = M('xinxi_fenlei')->where(array('id'=>$r['ben_fenlei_id']))->getField('title');
                /*商城位置ID*/
                $goods[$k]['weizhi'] = M('xinxi_weizhi')->where(array('id'=>$r['weizhi_id']))->getField('title');
                $guanzhu_where['status'] = 1;
                $guanzhu_where['shibie'] = 2;
                $uid = session('uid');
                if($uid != ''){
                    $guanzhu_where['uid'] = $uid;
                    $guanzhu_id = M('xinxi_guanzhu')->where($guanzhu_where)->getField('goods_user');
                    if($guanzhu_id == $r['id']){
                        $goods[$k]['love'] = 'active';
                    }else{
                        $goods[$k]['love'] = '';
                    }
                }else{
                    $goods[$k]['love'] = '';
                }
            }
            $this->assign('goods',$goods);
            $this->display();
        }else{
            //第二页的时候就开始返回json数据  
            //并显示抛回这是第几页
            $this->nextp=$nextpage;
            foreach($goods as $k=>$r){
                $goods[$k]['time'] = get_date($r['time']);
                $goods[$k]['banner'] = explode(',',$r['banner']);
                /*商铺店名*/
                if(!$r['uid']){
                    $goods[$k]['shang_name'] = $r['admin_user'];
                }else{
                    $name = get_yonghu($r['uid'],'shang_name');
                    if(!$name){
                        $goods[$k]['shang_name'] = '';
                    }else{
                        $goods[$k]['shang_name'] = $name;
                    }
                }
                /*商品分类*/
                $goods[$k]['fenlei'] = M('xinxi_fenlei')->where(array('id'=>$r['ben_fenlei_id']))->getField('title');
                /*商城位置ID*/
                $goods[$k]['weizhi'] = M('xinxi_weizhi')->where(array('id'=>$r['weizhi_id']))->getField('title');
                $guanzhu_where['status'] = 1;
                $guanzhu_where['shibie'] = 2;
                $uid = session('uid');
                if($uid != ''){
                    $guanzhu_where['uid'] = $uid;
                    $guanzhu_id = M('xinxi_guanzhu')->where($guanzhu_where)->getField('goods_user');
                    if($guanzhu_id == $r['id']){
                        $goods[$k]['love'] = 'active';
                    }else{
                        $goods[$k]['love'] = '';
                    }
                }else{
                    $goods[$k]['love'] = '';
                }
            }
            $data['index'] = M('xinxi_goods_if')->getField('index');//首页商品显示问题 单排显示1  还是双排显示2
            $data['list']=$goods;
            $data['nextp']=$nextpage;
            $data['status']=1;
            echo json_encode($data);
        }
    }