store/index.js
// 导入vue
import Vue from 'vue'
// 导入vuex
import Vuex from 'vuex'import cart from './module/cart'Vue.use(Vuex)// 创建仓库store
const store = new Vuex.Store({strict: true,modules: {cart}
})// 导出仓库
export default storestore/modules/cart
import request from '@/utils/request'export default {namespaced: true,state: {// 购物车数据[{},{}]list: []},getters: {total (state) {return state.list.reduce((sum, item) => sum + item.count, 0)},totalPrice (state) {return state.list.reduce((sum, item) => sum + item.count * item.price, 0)}},mutations: {updateList (state, newList) {state.list = newList},// 修改数量updateCount (state, payload) {// 根据id找到要更新的数据const goods = state.list.find(item => item.id === payload.id)// 更新数量goods.count = payload.count}},actions: {async getList (context) {const res = await request.get('/cart')console.log(res)context.commit('updateList', res)},// 修改数量/*请求方式：patch请求地址:http://localhost:3000/cart/:id请求参数{count:值,price:值}*/async updateCountAsync (ctx, payload) {// 修改后端的数据await request.patch('/cart/' + payload.id, {count: payload.count})// 更新vuex的数据ctx.commit('updateCount', payload)}}
}App.vue
<template><div id="app">
<CartHeader></CartHeader>
<CartItem v-for="item in list" :key="item.id" :item="item"></CartItem>
<CartFooter></CartFooter></div>
</template><script>
import CartHeader from '@/components/cart-header.vue'
import CartItem from '@/components/cart-item.vue'
import CartFooter from '@/components/cart-footer.vue'
import { mapState } from 'vuex'
export default {components: {CartHeader, CartItem, CartFooter},created () {this.$store.dispatch('cart/getList')},computed: {...mapState('cart', ['list'])}
}
</script><style lang="less" scoped>
#app{padding: 50px 0;
}
</style>components/cart-header.vue
<template><div class="header-container">购物车案例</div>
</template><script>
export default {name: 'CartHeader'
}
</script><style lang="less" scoped>
.header-container {height: 50px;line-height: 50px;font-size: 16px;background-color: #42b983;text-align: center;color: white;position: fixed;top: 0;left: 0;width: 100%;z-index: 999;
}
</style>components/cart-item.vue
<template><div class="goods-container"><!-- 左侧图片区域 --><div class="left"><img :src="item.thumb" class="avatar" alt=""></div><!-- 右侧商品区域 --><div class="right"><!-- 标题 --><div class="title">{{ item.name }}</div><div class="info"><!-- 单价 --><span class="price">￥{{ item.price }}</span><div class="btns"><!-- 按钮区域 --><button class="btn btn-light" @click="btnClick(-1)">-</button><span class="count">{{ item.count }}</span><button class="btn btn-light" @click="btnClick(1)">+</button></div></div></div></div>
</template><script>
export default {name: 'CartItem',props: {item: {type: Object,required: true}},methods: {btnClick(step) {const newCount = this.item.count + stepconst id = this.item.id// console.log(this.item.id, newCount)this.$store.dispatch('cart/updateCountAsync', { id, count: newCount })}}
}
</script><style lang="less" scoped>
.goods-container {display: flex;padding: 10px;+.goods-container {border-top: 1px solid #f8f8f8;}.left {.avatar {width: 100px;height: 100px;}margin-right: 10px;}.right {display: flex;flex-direction: column;justify-content: space-between;flex: 1;.title {font-weight: bold;}.info {display: flex;justify-content: space-between;align-items: center;.price {color: red;font-weight: bold;}.btns {.count {display: inline-block;width: 30px;text-align: center;}}}}
}.custom-control-label::before,
.custom-control-label::after {top: 3.6rem;
}
</style>components/cart-footer.vue
<template><div class="footer-container"><!-- 中间的合计 --><div><span>共 {{total}}件商品，合计：</span><span class="price">￥{{ totalPrice }}</span></div><!-- 右侧结算按钮 --><button class="btn btn-success btn-settle">结算</button></div>
</template><script>
import { mapGetters } from 'vuex'
export default {name: 'CartFooter',computed: {...mapGetters('cart', ['total', 'totalPrice'])}
}
</script><style lang="less" scoped>
.footer-container {background-color: white;height: 50px;border-top: 1px solid #f8f8f8;display: flex;justify-content: flex-end;align-items: center;padding: 0 10px;position: fixed;bottom: 0;left: 0;width: 100%;z-index: 999;
}.price {color: red;font-size: 13px;font-weight: bold;margin-right: 10px;
}.btn-settle {height: 30px;min-width: 80px;margin-right: 20px;border-radius: 20px;background: #42b983;border: none;color: white;
}
</style>
