陈莺莺呀

仿美团外卖-首页实现

1、环境搭建

基于node.js的http-server服务器搭建

https://www.npmjs.com/package/http-server

cnpm install http-server -g

2、首页实现

创建一个目录，叫webapp，在里面创建一个index.html

打开cmd，进入webapp目录，输入以下代码：

http-server

3、在浏览器输入网址：http://127.0.0.1:8080/

成功访问到index.html

打开sublime-首选项-插件设置-cssrem-settings-user

37.5是iphone6设备的通用设置

{
    "px_to_rem": 37.5, //px转rem的单位比例，默认为40
    "max_rem_fraction_length": 6, //px转rem的小数部分的最大长度。默认为6。
    "available_file_types": [".css", ".less", ".sass",".html"]
    //启用此插件的文件类型。默认为：[".css", ".less", ".sass"]
}

4、移动端滚动加载

首页效果图：

首先是目录结构

index.html

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>indextitle>
    <meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0,user-scalable=no">
    <script>
        (function(){
            //这段代码放在所有的样式文件之前，设置html根元素的fontSize
            var docEl=document.documentElement;

            function setRem(){
                // 这个10不是固定的，只是计算出来的rem要和cssrem插件setting中设置的37.5保持一致
                // iphone6设备宽度是375，因此基准值刚好是10
                var rem=docEl.clientWidth/10;//获取基准值
                docEl.style.fontSize=rem+"px";//动态设置html根元素的fontSize
            }

            setRem();

            window.addEventListener("resize",setRem);

            //用户每次浏览页面的时候， 就会触发pagesshow方法（有兼容性问题）
            window.addEventListener("pageshow",function(e){
                // 使用e.presisted就是判断当前页面是不是在缓存中加载
                // 如果缓存中加载（就是为true的时候），重新设置rem
                if(e.persisted){
                    setRem();
                }
            });
        })();

    script>
    <link rel="stylesheet" href="../lib/reset.css">
    <link rel="stylesheet" href="index.css">
    <link rel="stylesheet" href="../common/common.css">
head>
<body>
    
    <div class="header">
        <div class="search-bar">
            <div class="bar-location">
                <div class="location-icon">div>
                <div class="location-text">宁波市div>
            div>
            <div class="search-btn">
                <div class="place-holder">鸡翅div>
            div>
        div>    
        <img src="images/header-bg.jpg" class="header-img">
    div>
    

    
    <div class="category-content clearfix">div>
    

    
    <div class="list-content">
        <h4 class="list-title">
            <span class="title-line">span>
            <span>附近商家span>
            <span class="title-line">span>
        h4>
        <div class="list-wrap">div>
        <div class="loading">加载中div>
    div>
    

    
    <div class="bottom-bar">div>
    

    <script src="../lib/jquery.min.js">script>
    <script src="index.js">script>
    <script src="../common/common.js">script>
body>
html>

index.css

/*header*/
.header{
    position: relative;
}
.header .search-bar{
    position: absolute;
    width:100%;
    height:1.066667rem;
    display: flex;
    justify-content: center;
    align-items:center;
    padding-top: 0.213333rem;
}
.header .bar-location{
    margin-right:0.533333rem;
    border-radius:0.346667rem;
    background:rgba(0,0,0,.33);
    width:2.453333rem;
    height:0.746667rem;
}
.header .location-icon{
    display: inline-block;
    width:0.4rem;
    height:0.533333rem;
    vertical-align:0.266667rem;/*垂直方向的偏移量*/
    margin-left:0.213333rem;
    background:url(images/locationIcon.png);
    background-size:cover;/*设置图片平铺正常显示*/
}
.header .location-text{
    position: relative;
    font-size:0.373333rem;
    vertical-align:0.4rem;
    display: inline-block;
    color:#fff;
    margin-left:-0.106667rem;
}
.header .location-text:after{
    position: absolute;
    display: inline-block;
    content:"";
    width:0.373333rem;
    height:0.373333rem;
    background-image:url(images/arrowIcon.png);
    background-size:cover;

}
.header .search-btn{
    position: relative;
    width:4.533333rem;
    height:0.8rem;
    background-color: #fff;
    border-radius:0.533333rem;
}
.header .search-btn:before{
    position: absolute;
    display: inline-block;
    content:"";
    width:0.373333rem;
    height:0.373333rem;
    background-image:url(images/searchIcon.png);
    background-size:cover;
    left: 0.213333rem;
    top: 0.213333rem;
}
.header .place-holder{
    color:#a9a9a9;
    font-size:14px;
    height:100%;
    line-height:0.8rem;
    margin-left:0.746667rem;
}
.header .header-img{
    width:100%;
    height: 4.746667rem;
}

/*category*/
.category-content{
    padding-bottom:0.266667rem;
}
.category-content .category-item{
    padding-top:0.373333rem;
    font-size:0.346667rem;
    float:left;
    width:25%;
    text-align: center;
}
.category-content .item-icon{
    width:1.253333rem;
}
.category-content .item-name{
    margin-top:0.373333rem;
}

/*list*/
.list-content{
    overflow:hidden;
    padding-bottom:1.333333rem;
}
.list-content .list-title{
    text-align: center;
    font-size:0.426667rem;
    margin-top:0.373333rem;
    margin-bottom:0.133333rem;
}
.list-content .title-line{
    display: inline-block;
    border-bottom:0.026667rem solid #949494;
    width:0.8rem;
    height:0.026667rem;
    margin:0 0.106667rem 0.106667rem 0.106667rem;
}
.list-content .list-wrap{

}
.list-content .r-item-content{
    display: flex;
    margin:0 0.266667rem;
    padding:0.4rem 0;
    color:#656565;
    position: relative;
}
.list-content .item-img{
    width:2.293333rem;
    height:1.733333rem;
    border:1px solid #141414;
}
.list-content .item-info-content{
    flex:1;/*平分除了图片之外的剩余空间*/
    display: flex;
    flex-direction:column;
    margin-left:0.186667rem;
    overflow:hidden;
}
.list-content .brand{
    position: absolute;
    left:0.026667rem;
    top:0.426667rem;
    font-size:0.32rem;
    padding:0.053333rem;
    color:#fff;
}
.list-content .brand-pinpai{
    background:#ffa627;
}
.list-content .brand-xindao{
    background:#21c56c;
}
.list-content .item-title{
    margin-top:0.08rem;
    font-size:0.426667rem;
    font-weight:500;
    color:#333;
}
.list-content .item-desc{
    margin-top:0.346667rem;
    font-size:0.32rem;
}
.list-content .item-score{
    float:left;
}
/*星级评分*/
.list-content .star-score{

}
.list-content .star{
    width: 0.266667rem;
    height:0.266667rem;
    float:left;
    background-size:cover;
}
.list-content .fullStar{
    background-image:url(images/fullstar.png);
}
.list-content .halfStar{
    background-image:url(images/halfstar.png);
}
.list-content .noStar{
    background-image:url(images/gray-star.png);
}
.list-content .item-count{
    float:left;
    margin-left:0.133333rem;
}
/*在js里先写distance再写time
float:right是从右往左排列
因此实际显示时time在distance的左边*/
.list-content .item-distance{
    float:right;
}
.list-content .item-time{
    float:right;
}
.list-content .item-price{
    margin-top:0.266667rem;
    font-size:0.32rem;
    height:0.64rem;
}
.list-content .item-pre-price{

}
.list-content .item-others{

}
.list-content .other-info{
    color:#898989;
    margin-top:0.186667rem;
    font-size:0.32rem;
    display: flex;    
}
.list-content .other-tag{
    width:0.373333rem;
    height:0.373333rem;
}
.list-content .other-content{
    margin-left:0.08rem;
    height:0.373333rem;
    width:6.133333rem;
    margin-top:0.026667rem;
}
.list-content .loading{
    padding:0.266667rem 0;
    font-size:0.426667rem;
    text-align: center;
    color:#ccc;
}

index.js

(function(){

    //加载类目
    function initCategory(){
        //类目的模板字符串
        var itemTpl=''+
                        ''+
                        '$name'+
                    '
';
        var itemHtml="";

        //获取category数据
        $.get("../json/head.json",function(data){

            var list=data.data.primary_filter.splice(0,8);//只取前8条数据
            list.forEach(function(item,index){
                var str=itemTpl
                        .replace("$url",item.url)
                        .replace("$name",item.name);
                itemHtml+=str;
            })
            $(".category-content").append(itemHtml);        
        })

        //绑定item的click事件
        $(".category-content").on("click",".category-item",function(){
            alert("点击事件还未编写");
        });
    }    

    //加载列表
    function initList(){
        //列表的模板字符串
        var itemTpl=''+
                        ''+//图片
                        '$brand'+//图标
                        ''+
                            '$name'+
                            ''+//详细
                                '$score'+
                                '月售$count'+
                                ' $distance'+
                                '$time |'+
                            ''+
                            ''+
                                '$minPrice
'+//起送价
                            ''+
                            '$others
'+//活动描述
                        ''+
                    '
';
        var itemHtml="";
        var page=0;//当前页
        var isLoading=false;//当前是否处于加载中

        //获取列表数据
        function getList(){
            page++;
            isLoading=true;

            $.get("../json/homelist.json",function(data){
        
                var list=data.data.poilist;
                list.forEach(function(item,index){
                    var str=itemTpl
                            .replace("$url",item.pic_url)
                            .replace("$brand",getBrand(item))//标签
                            .replace("$name",item.name)//商品名
                            .replace("$score",getScore(item))//星级评分
                            .replace("$count",getMonth(item))//月售
                            .replace("$distance",item.distance)//配送距离
                            .replace("$time",item.mt_delivery_time)//配送时间
                            .replace("$minPrice",item.min_price_tip)//起送价
                            .replace("$others",getOthers(item));//商家活动
                    itemHtml+=str;
                })
                $(".list-wrap").append(itemHtml);
                isLoading=false;
            })
        }

        getList();//默认先请求一次    

        //渲染brand标签
        function getBrand(data){
            if(data.brand_type){
                return '品牌
';
            }else{
                return '新到
';
            }
        }

        //月售大于999，返回999+
        function getMonth(data){
            var num=data.month_sale_num;
            if(num>999){
                return '999+';
            }else{
                return num;
            }
        }

        //商家活动
        function getOthers(data){
            var arr=data.discounts2;
            var str="";
            arr.forEach(function(data,index){
                var _str=''+
                            ''+
                            '$content'+
                          '
';
                _str=_str.replace("$icon",data.icon_url)
                         .replace("$content",data.info);
                str+=_str;
            })
            return str;
        }

        //获取星级评分
        function getScore(data){
            var itemTpl='$star
';
            var score=data.wm_poi_score||"";//得到分数
            var scoreArr=score.toString().split(".");//如评分为4.5，则拆分为4个整星，5个半星
            var str="";

            var fullStar=parseInt(scoreArr[0]);//整星
            var halfStar=parseInt(scoreArr[1])>=5?1:0;//半星四舍五入
            var noStar=5-fullStar-halfStar;//无星

            for(var i=0;i){
                str+='
';
            }
            for(var i=0;i){
                str+='
';
            }
            for(var i=0;i){
                str+='
';
            }
            return itemTpl.replace("$star",str);
        }

        //滚动加载
        window.addEventListener("scroll",function(){
            var clientHeight=document.documentElement.clientHeight;//视窗高度
            var scrollHeight=document.body.scrollHeight;//body滚动过的总长
            var scrollTop=document.documentElement.scrollTop || document.body.scrollTop;//body滚动过的总长

            var preDis=30;//提前的预值
            if((scrollTop+clientHeight)>=(scrollHeight-preDis)){
        
                //自定义页面，一次最多滚动3页
                if(page<3){
                    if(isLoading) return;
                    getList();            
                }else{
                    $(".loading").text("加载完成");
                }
            }
        });
    }

    function init(){
        initCategory();//加载类目
        initList();//加载列表
    }

    init();
    
})();

common是存在公共样式和公共脚本

common.css

/*bottomBar*/
.bottom-bar{
    position: fixed;
    width:100%;
    height:1.333333rem;
    bottom:0;
    display: flex;
    border-top:1px solid #b6b6b6;
    background-color:rgba(246,246,246,.95);
}
.bottom-bar .btn-item{
    display: flex;
    flex-direction:column;
    flex:1;/*平分多余空间*/
    align-items:center;
    justify-content: center;
    color:#999;
    font-size:0.32rem;
    background-size:cover;
}
.bottom-bar .btn-item.active{
    color:#000;
}
.bottom-bar .index .tab-icon{
    background-image:url(images/homeIcon.png);
}
.bottom-bar .index.active .tab-icon{
    background-image:url(images/homeIconActive.png);
}
.bottom-bar .order .tab-icon{
    background-image:url(images/orderIcon.png);
}
.bottom-bar .order.active .tab-icon{
    background-image:url(images/orderIconActive.png);
}
.bottom-bar .my .tab-icon{
    background-image:url(images/myIcon.png);
}
.bottom-bar .my.active .tab-icon{
    background-image:url(images/myIconActive.png);
}
.bottom-bar .tab-icon{
    margin-bottom:0.106667rem;
    width:0.666667rem;
    height:0.666667rem;
}
.bottom-bar .btn-name{

}

common.js

(function(){

    //加载底部菜单
    function initBottomBar(){
        //底部菜单的模板字符串
        var itemTpl=''+
                        ''+
                        '$text'+
                    '';
        var items=[{
            key:"index",
            text:"首页"
        },{
            key:"order",
            text:"订单"
        },{
            key:"my",
            text:"我的"
        }];

        var str="";
        items.forEach(function(item){
            str+=itemTpl.replace("$key",item.key)
                   .replace("$text",item.text);
        });

        $(".bottom-bar").append(str);

        //判断当前属于哪个页面
        var arr=window.location.pathname.split("/");
        var page=arr[arr.length-1].replace(".html","");//最后一个元素，去掉.html
        page=page==""?"index":page;//默认显示首页
        $("a.btn-item").removeClass("active");
        $("a."+page).addClass("active");

    }    

    initBottomBar();//加载底部菜单
    
})();

lib存放了reset.css和jquery

reset.css一般网上都找得到，基本的浏览器重置样式

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
    display: block;
}
body {
    line-height: 1;
}
ol, ul {
    list-style: none;
}
blockquote, q {
    quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
    content: '';
    content: none;
}
table {
    border-collapse: collapse;
    border-spacing: 0;
}

/*清浮动*/
.clearfix::after {
    content: ' ';
    visibility: hidden;
    display: block;
    height: 0;

    clear: both;
}

/*文字超出一行时显示省略号*/
.one-line {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.hide {
    display: none;
}

json里放的是模拟的从服务器端读取到的数据

head.json

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