网站设计论文前言怎么写网页设计欣赏英文
一、商品详情
1、从商品列表页跳转到商品详情页
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在商品列表的项中绑定单击事件,并传递商品id值
 
<view class="goods-item" v-for="(item,index) in goodsList" :key="index" @click="goGoodsDetail(item.goods_id)">
</view> 
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在methods选项中定义goGoodsDetail方法实现跳转到商品详情页
 
goGoodsDetail(goods_id){uni.navigateTo({url:`/pages/goodsdetail/index?goods_id=${goods_id}`})
} 
2、获取商品详情数据
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在data中定义商品详情的数据
 
data() {return {goods_item:{}}
} 
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在
onLoad中获取商品的 Id,并调用请求商品详情的方法 
onLoad(options) {let gid=options.goods_idthis.getGoodsById(gid)
} 
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在
methods中声明getGoodsById方法: 
methods: {async getGoodsById(goods_id){let result=await uni.$api.get('/goods/detail',{goods_id:goods_id})this.goods_item=result.data.message}
}, 
3、渲染商品轮播图区域
-  
渲染轮播图区域
 
<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" class="swiper"><swiper-item v-for="(item,index) in goods_item.pics" :key="index"><image :src="item.pics_big"></image></swiper-item>
</swiper>
<style lang="scss">.swiper{height: 750rpx;image{width: 100%;height: 100%;}}
</style> 
-  
完成轮播图预览功能
 
为轮播图中的 image 图片绑定 click 事件处理函数:
<swiper-item v-for="(item,index) in goods_item.pics" :key="index"><image :src="item.pics_big" @click="perview(index)"></image>
</swiper-item> 
在 methods 中定义 preview 事件处理函数:
perview(index){uni.previewImage({current:index,urls:this.goods_item.pics.map(item=>item.pics_big)})
} 
4、渲染商品信息区域
<view class="goods-info-box"><!-- 商品价格 --><view class="price">¥{{goods_item.goods_price}}</view><!-- 信息主体区域 --><view class="goods-info-body"><!-- 商品名称 --><view class="goods-name">{{goods_item.goods_name}}</view><!-- 收藏 --><view class="favi"><uni-icons type="star" size="18" color="gray"></uni-icons><text>收藏</text></view></view><!-- 运费 --><view class="yf">快递:免运费</view>
</view>
<rich-text :nodes="goods_item.goods_introduce"></rich-text>
.goods-info-box {padding: 10px;padding-right: 0;.price {color: #c00000;font-size: 18px;margin: 10px 0;}.goods-info-body {display: flex;justify-content: space-between;.goods-name {font-size: 13px;padding-right: 10px;}// 收藏区域.favi {width: 120px;font-size: 12px;display: flex;flex-direction: column;justify-content: center;align-items: center;border-left: 1px solid #efefef;color: gray;}}// 运费.yf {margin: 10px 0;font-size: 12px;color: gray;}} 
5、渲染详情页底部的商品导航区域
在 data 中,通过 options 和 buttonGroup 两个数组,来声明商品导航组件的按钮配置对象
data(){return{options: [{icon: 'shop',text: '店铺'}, {icon: 'cart',text: '购物车',info: 2}],// 右侧按钮组的配置对象buttonGroup: [{text: '加入购物车',backgroundColor: '#ff0000',color: '#fff'},{text: '立即购买',backgroundColor: '#ffa200',color: '#fff'}]}
} 
在页面中使用 uni-goods-nav 商品导航组件:
<view class="goods_nav"><uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
</view> 
美化商品导航组件,使之固定在页面最底部:
.container{padding-bottom: 100rpx;
}
.goods_nav {// 为商品导航组件添加固定定位position: fixed;bottom: 0;left: 0;
} 
二、加入购物车
1、下载vuex
npm i vuex@3.6.2 
2、配置Vuex
-  
在src下创建store文件夹,在store文件夹下创建index.js文件
 
import Vue from 'vue'
import Vuex from 'vuex'
Vue.use(Vuex)
const store=new Vuex.Store({modules:{}
})
export default store 
-  
在main.js将store对象挂载到Vue的实例上
 
import store from '@/store/index.js'
const app = new Vue({...App,store
})
app.$mount() 
3、创建购物车模块
-  
在store/modules目录下创建shopcart.js文件
 
export default{namespaced:true,state:{shopcartList:[]},mutations:{},getters:{}
} 
-  
在
store/index.js模块中,导入并挂载购物车的 vuex 模块 
import Vue from 'vue'
import Vuex from 'vuex'
import shopart from '@/store/modules/shopcart.js'
Vue.use(Vuex)
const store=new Vuex.Store({modules:{shopart}
})
export default store 
4、在商品详情中使用store中的数据
import {createNamespacedHelpers} from 'vuex'
const {mapState:mapShopcartState}=createNamespacedHelpers('shopart')
export default {computed:{...mapShopcartState(['shopcartList'])}
} 
5、实现加入购物车的功能
-  
编写一个加入购物车的方法的mutations方法addToShopcart方法
 
export default{namespaced:true,state:{shopcartList:[]},mutations:{addToShopart(state,goods){const result=state.shopcartList.find(item=>item.goods_id==goods.goods_id)if(!result){state.shopcartList.push(goods)}else{goods.goods_count++}}},getters:{}
} 
-  
在商品详情页面中,通过
mapMutations这个辅助方法,把 vuex 中shopcart模块下的addToShopart方法映射到当前页面: 
import {createNamespacedHelpers} from 'vuex'
const {mapState:mapShopcartState,mapMutations:mapShopcartMutations}=createNamespacedHelpers('shopart')
export default{methods:{...mapShopcartMutations(['addToShopart']),}
} 
-  
为商品导航组件
uni-goods-nav绑定@buttonClick="buttonClick"事件处理函数: 
buttonClick(e){if(e.content.text=='加入购物车'){const goods = {goods_id: this.goods_item.goods_id,       goods_name: this.goods_item.goods_name,   goods_price: this.goods_item.goods_price, goods_count: 1,                          goods_small_logo: this.goods_item.goods_small_logo, goods_state: true                         }this.addToShopart(goods)}
} 
6、动态统计购物车中商品的总数量
在 getters 节点下定义一个 total 方法,用来统计购物车中商品的总数量:
getters:{total(state){return state.shopcartList.reduce((prev,cur)=>prev+cur.goods_count,0)}
} 
-  
导入
mapGetters方法并进行使用 
import {createNamespacedHelpers} from 'vuex'
const {mapGetters:mapShopcartGetters}=createNamespacedHelpers('shopart')
export default{computed:{...mapShopcartGetters(['total'])},
} 
-  
通过
watch侦听器,监听计算属性total值的变化,从而动态为购物车按钮的徽标赋值 
watch:{total:{handler(newval){let result=this.options.find(item=>item.text==="购物车")if(result){result.info=newval}},immediate:true}
}, 
7、持久化购物车中的商品
修改 mutations 节点中的 addToCart 方法,在处理完商品信息后,调用 saveToStorage 方法:
mutations:{addToShopart(state,goods){const result=state.shopcartList.find(item=>item.goods_id==goods.goods_id)if(!result){state.shopcartList.push(goods)}else{goods.goods_count++}uni.setStorageSync('cart',JSON.stringify(state.shopcartList))},}, 
修改 shopcart.js 模块中的 state 函数,读取本地存储的购物车数据,对 shopcartList 数组进行初始化
state:{shopcartList:JSON.parse(uni.getStorageSync('cart')||'[]')
} 
三、购物车列表
1、购物车列表
<template><view class="container"><view v-for="(goods,index) in shopcartList" :key="index" class="goods-item"><view class="goods-item-left"><radio checked color="#C00000"></radio><image :src="goods.goods_small_logo" class="goods-pic"></image></view><view class="goods-item-right"><view class="goods-name">{{goods.goods_name}}</view><!-- 商品价格 --><view class="goods-price">¥{{goods.goods_price}}</view><!-- 商品数量 --><uni-number-box :min="1"></uni-number-box></view></view></view>
</template><script>import {createNamespacedHelpers} from 'vuex'const {mapState: mapShopcartState,mapMutations: mapShopcartMutations,mapGetters: mapShopcartGetters} = createNamespacedHelpers('shopart')export default {data() {return {}},methods: {},computed: {...mapShopcartState(['shopcartList'])}}
</script><style lang="scss">.container {.goods-item {display: flex;margin: 20rpx 10rpx;.goods-item-left {margin-right: 5px;display: flex;justify-content: space-between;align-items: center;.goods-pic {width: 100px;height: 100px;display: block;}}.goods-item-right {.goods-price{color: #C00000;}}}}
</style> 
2、修改购物车商品的勾选状态
-  
给shopcart.js模块中的mutations选项中添加修改购物车状态的方法
 
mutations:{updateShopcartState(state,goods){const result=state.shopcartList.find(item=>item.goods_id==goods.goods_id)if(result){result.goods_state=!goods.goods_state}uni.setStorageSync('cart',JSON.stringify(state.shopcartList))}
}, 
-  
在购物车列表页面中进行访问
 
methods: {...mapShopcartMutations(['updateShopcartState']),radioChange(goods){this.updateShopcartState(goods)}
}, 
3、修改购物车商品数量的方法
给shopcart.js模块中的mutations选项中添加修改s购物车数量的方法的方法
mutations:{updateShopcartNum(state,goods){const result=state.shopcartList.find(item=>item.goods_id==goods.goods_id)if(result){result.goods_count=goods.goods_count}uni.setStorageSync('cart',JSON.stringify(state.shopcartList))}
},
 
-  
在uni-number-box绑定change事件
 
<uni-number-box :min="1" :value="goods.goods_count" @change="numChange($event,goods)"></uni-number-box> 
-  
在购物车列表页面中进行访问
 
methods: {...mapShopcartMutations(['updateShopcartState','updateShopcartNum']),radioChange(goods){this.updateShopcartState(goods)},numChange(e,val){this.updateShopcartNum({goods_id:val.goods_id,goods_count:e})}
},