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HarmonyOS
感谢各位给出的思路，已经实现在vuex里边做的添加数量
代码已更新，给不明白的同学参考，自己再尝试一下组件来实现不用vuex。
问题描述
问题出现的环境背景及自己尝试过哪些方法
就是单个商品增加数量的时候，所有商品都跟着增加，如何区分开，求解？
相关代码
export default {
state: {
listData:[
{
id:"122678687367670",
imgUrl:"https://ss0.baidu.com/94o3dSag_xI4khGko9WTAnF6hhy/image/h%3D300/sign=a45c64e436292df588c3aa158c335ce2/9345d688d43f87949470e9e5de1b0ef41ad53a69.jpg",
title:"标题：我是标题",
info:"描述：我是描述",
price:10,
num:0
},
{
id:"122678687367671",
imgUrl:"https://ss0.baidu.com/94o3dSag_xI4khGko9WTAnF6hhy/image/h%3D300/sign=a45c64e436292df588c3aa158c335ce2/9345d688d43f87949470e9e5de1b0ef41ad53a69.jpg",
title:"标题：我是标题",
info:"描述：我是描述",
price:20,
num:0
},
{
id:"122678687367672",
imgUrl:"https://ss0.baidu.com/94o3dSag_xI4khGko9WTAnF6hhy/image/h%3D300/sign=a45c64e436292df588c3aa158c335ce2/9345d688d43f87949470e9e5de1b0ef41ad53a69.jpg",
title:"标题：我是标题",
info:"描述：我是描述",
price:9.9,
num:0
}
]
},
getters:{
showTotal(state){
let datas = state.listData;
let totals = 0;
datas.forEach(v => {
totals += v.num;
});
return totals;
},
showPrice(state){
let datas = state.listData;
let prices = 0;
datas.forEach(v => {
prices += v.num * v.price;
});
return prices;
console.log(price);
}
},
mutations: {
add:(state,index) => {
state.listData[index].num++;
// state.totalAll = (state.listData[index].price * state.listData[index].num).toFixed(2);
// state.listData[index].total = (state.listData[index].price * state.listData[index].num).toFixed(2);
},
sub:(state,index) => {
if(state.listData[index].num > 0){
state.listData[index].num--;
// state.listData[index].total = (state.listData[index].price * state.listData[index].num).toFixed(2);
}else{
alert("我是有底线的");
}
}
},
actions:{
jia(context,index){
context.commit('add',index);
},
jian(context,index){
context.commit('sub',index);
}
}
}
<template>
<div class="info">
<left @indexNb="indexNbs"></left>
<div class="info-mean">
<div class="item" v-show="nowIndex===0">
<ul>
<li v-for="(list,index) in listDatas" :key="list.id">
<img :src="list.imgUrl">
<h1>{{list.title}}</h1>
<p>{{list.info}}</p>
<em>单价：{{list.price}}</em>
<span @click="$store.dispatch('jian',index)">-</span>
<input type="text" name="" v-model="list.num" readonly="">
<span @click="$store.dispatch('jia',index)">+</span>
</li>
</ul>
</div>
<div class="item" v-show="nowIndex===1">2</div>
<div class="item" v-show="nowIndex===2">3</div>
</div>
</div>
</template>
<script>
import left from '@/components/left'
export default {
name: 'info',
components:{
left
},
data:function(){
return {
nowIndex:0,
listDatas:[]
}
},
mounted:function(){
this.listDatas = this.$store.state.cart.listData
},
methods:{
indexNbs:function(index){
this.nowIndex = index;
}
}
}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.info{
position: absolute;
top:50px;
left:0;
right:0;
}
.info-mean{
margin-left:60px;
padding:20px;
}
.item ul li{
border-bottom: dotted 1px #dedede;
padding-bottom:10px;
}
.item ul li img{
width:100%;
height:80px;
}
.item ul li h1{
font-size:16px;
font-weight:normal;
color:#333;
}
.item ul li p{
font-size:14px;
color:#999;
}
.item ul li em{
display: block;
font-style: normal;
color:#f60;
font-size:18px;
}
.item ul li span{
width:22px;
height:22px;
text-align: center;
line-height: 22px;
display: inline-block;
background: #ccc;
}
.item ul li input{
width:30px;
border:solid 1px #dedede;
height:20px;
line-height: 20px;
vertical-align: middle;
margin-top:-1px;
text-align: center;
}
</style>
本人建议vuex里面存一个对象数组吧,里面包含每一件商品的各项信息，例如
[{shopName: '水杯',price: 3, quantity: 1}]。