vue实现的仿淘宝购物车功能详解
本文实例讲述了vue实现的仿淘宝购物车功能。分享给大家供大家参考，具体如下：
下面是一张众所周知的淘宝购物车页面，今天要讲解的案例就是用vue.js做一个类似的页面
首先简单介绍一下可能会用到的一些vue.js的用法：
v-bind，绑定属性；例如v-bind:class="{'class1':flag}"，这是常用的绑定样式的方法，如果flag为true则class=class1；v-bind:src="image",image就是图像的路径;
v-if="flag"与v-show="flag"，如果flag为true，则绑定的为“可见”，不同的是v-show是一开始就渲染在DOM中的，改变的则是它的display而已，而v-if为false则是从HTML代码中移除；
v-on:或@，样式绑定v-on:click="dosomething()"或者@click="dosomething()"，点击触发dosomething函数；
v-for循环，v-for="item in items"，items为数组，item为items数组的值而不是索引；
要注意的是当this作用域的改变：当this作用域改变是我们设置var self = this，在之后的使用中用self代替；
下面是HTML代码：
<html>
<head>
<title>购物车</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" type="text/css" href="shop.css" rel="external nofollow" >
</head>
<body>
<div id="app">
<div class="header"><span style="margin-left: 75px;">商品</span><span style="margin-left: 70px;">单价</span><span style="margin-left: 35px;">数量</span><span style="margin-left: 40px;">总价</span></div>
<div v-for="item in goods">
<div class="show" v-show="item.selected">
<span class="choice" v-bind:class="{'checked':item.checked}" @click="check(item)"></span>
<div style="float:left;margin-left: 20px;"><img v-bind:src="item.image" v-bind:alt="item.alt" class="image"/><span class="text">{{item.name}}</span></div>
<span style="float:left;margin-left: 20px;margin-top:20px;width:40px;">{{item.price}}元</span>
<div style="float:left;margin-left: 30px;margin-top: 20px;">
<span v-on:click="changeNum(item,-1)"><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >-</a></span>
<input v-model="item.number" class="output" disabled/>
<span v-on:click="changeNum(item,1)"><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >+</a></span>
</div>
<div style="float:left;margin-left: 30px;margin-top: 25px;width:51px;">￥{{item.price * item.number}}元</div>
<span class="icon" @click="seen=true"></span>
</div>
</div>
<!--footer-->
<div id="footer">
<span class="choice" style="margin-top:18px;" v-bind:class="{'checked':checkAllFlag}"></span>
<a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" @click="checkAll(true)">全选</a>
<a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" style="color:;" @click="checkAll(false)">取消全选</a>
<span style="display:inline-block;margin-left:70px;width:95px;">Total:￥{{totalAll}}元</span>
<span><button class="count">结 算</button></span>
</div>
<div id="info" v-show="seen">
<p style="margin-top:20px;">是否删除该商品?</p><div class="close" @click="seen=false">×</div>
<button class="get" style="padding-left:10px;" @click="">yes</button><button class="get" style="margin-left:20px;" @click="seen=false">no</button>
</div>
<div class="shadow" v-show="seen"></div>
</div>
</body>
<script src="./src/vue.min.js"></script>
<script src="./src/vue-resource.min.js"></script>
<script src="shop.js"></script>
</html>
下面的是js的代码：
var vm = new Vue({
el:'#app',
data:{
total: 0,
totalAll: 0,
goods: [],//商品为数组
checkAllFlag: false,
seen: false,
delFlag: true
},
mounted: function () {
this.goodlist();
},
methods:{
//改变商品数量
changeNum:function (item,flag) {
if (flag>0) {
item.number++;
}else{
item.number--;
if(item.number<1){
item.number = 1;
}
}
this.totalMoney();
},
//是否选中
check:function (item) {
if(typeof item.checked == 'undefined'){
this.$set(item,"checked",true);
//局部为item添加“checked”，值为true
}else{
item.checked = !item.checked;
}
this.totalMoney();
},
//通过$http.get方法ajax地交互获取商品信息，一定要引入vue-resource组件
goodlist:function () {
var self = this;
this.$http.get("shop.json").then(function (res) {
self.goods = res.data.result.goods;
},function () {
console.log("failed");
});
},
//是否全选
checkAll:function (flag) {
this.checkAllFlag = flag;
var self = this;
this.goods.forEach(function(value,index){
if(typeof value.checked == 'undefined'){
self.$set(value,"checked",self.checkAllFlag);
}else{
value.checked = self.checkAllFlag;
}
});
this.totalMoney();
},
//结算选中商品的价格
totalMoney:function () {
//初始化总价
this.totalAll = 0;
var self =this;
//通过foreach循环判断是否被选中
this.goods.forEach(function(value,index){
if(value.checked){
self.totalAll += value.price * value.number;
}
});
}
}
})
下面是CSS代码：
*{padding: 0;margin: 0;}
a{text-decoration: none;color: black;}
#app{width: 500px;height: 600px;border: 1px solid;position: absolute;margin-top:20px;margin-left:50px;}
.header{width: 500px;height: 30px;line-height: 30px;background-color: darkmagenta;}
.header span{display: inline-block;width: 50px;height: 30px;}
.show{width: 500px;height: 85px;margin-top: 5px;}
#footer{position: absolute;bottom: 0;width: 500px;height: 50px;background-color: #c7c7c9;}
.output{width: 40px;height: 20px;}
.image{width: 60px;height: 80px;float:left;}
.choice{display: inline-block;width: 15px;height: 15px;border-radius: 15px;border: 1px solid;float: left;margin-top: 30px;margin-left: 20px;}
.checked{background-color: darkorange;}
.icon{background-image: url(del.png);display: inline-block;width: 30px;height: 30px;margin-left: 50px;margin-top: 20px;}
.text{display:inline-block;width:50px;height:20px;line-height:20px;font:12px;margin-top:20px;margin-left:5px;float:left;}
.count{width:100px;height:40px;background-color:red;line-height:40px;font-size:16px;margin-left:40px;margin-top:5px;}
#footer a{display:inline-block;margin-left:5px;height:22px;}
#info{width:250px;height:100px;position:absolute;border:1px solid;margin-top:-250px;margin-left:120px;background-color:#c7c7c9;text-align:center;z-index:999;}
.get{width:80px;height:30px;font:17px;margin-top:10px;}
.shadow{width:100%;height:100%;background-color:black;opacity:0.8;margin-top:-480px;z-index:1;}
.close{position:absolute;right:2px;top:-5px;cursor:pointer;}
下面是json代码：
{
"status":1,
"result":{
"total":50,
"goods":[
{
"name":"香烟",
"price":15,
"number":1,
"selected": true,
"image": "./img/xiangyan.jpg",
"alt": "香烟"
},
{
"name": "啤酒",
"price": 12,
"number": 1,
"selected": true,
"image": "./img/pjiu.jpg",
"alt": "啤酒"
},
{
"name": "打火机",
"price": 2,
"number": 1,
"selected": true,
"image": "./img/fire.jpg",
"alt": "打火机"
},
{
"name": "鸡腿",
"price": 5,
"number": 1,
"selected": true,
"image": "./img/chick.jpg",
"alt": "鸡腿"
},
{
"name": "垃圾袋",
"price": 8,
"number": 1,
"selected": true,
"image": "./img/bush.jpg",
"alt": "垃圾袋"
}
]
},
"message":""
}
实现的结果如下图：
代码下载：https://github.com/createor/vue/raw/master/vue.zip
或者点击此处本站下载。
希望本文所述对大家vue.js程序设计有所帮助。
