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WeChat AppletMini Program DevelopmentWeChat Mini Program Mall Development to Implement the Function of Adding Products to the Shopping Cart (Code)
WeChat AppletMini Program DevelopmentWeChat Mini Program Mall Development to Implement the Function of Adding Products to the Shopping Cart (Code)WeChat Mini Program Mall Development to Implement the Function of Adding Products to the Shopping Cart (Code)
WeChat applet
The content of this article is about the development of WeChat mini program mall to implement the function (code) of adding products to the shopping cart. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you. help.
See the effect
Shopping cart.gif
Development plan
1. Put the product information on the product details page Enter the cache
2. Read the cache on the shopping cart page to obtain product information
3. Calculate the shopping cart products and delete the cached products
1. Put the product information into the cache on the product details page
detail.wxml
<button data-goodid="{{goods.goodsId}}" class="button-addCar" bindtap="addCar" formType="submit">确定</button>Bind the bindtap event to add the product to the shopping cart.
detail.js
/**
* 加入购物车
*/
addCar: function (e) {
var goods = this.data.goods;
goods.isSelect=false;
var count = this.data.goods.count;
var title = this.data.goods.title;
if (title.length > 13) {
goods.title = title.substring(0, 13) + '...';
}
// 获取购物车的缓存数组（没有数据，则赋予一个空数组）
var arr = wx.getStorageSync('cart') || [];
console.log("arr,{}", arr);
if (arr.length > 0) {
// 遍历购物车数组
for (var j in arr) {
// 判断购物车内的item的id，和事件传递过来的id，是否相等
if (arr[j].goodsId == goodsId) {
// 相等的话，给count+1（即再次添加入购物车，数量+1）
arr[j].count = arr[j].count + 1;
// 最后，把购物车数据，存放入缓存（此处不用再给购物车数组push元素进去，因为这个是购物车有的，直接更新当前数组即可）
try {
wx.setStorageSync('cart', arr)
} catch (e) {
console.log(e)
}
//关闭窗口
wx.showToast({
title: '加入购物车成功！',
icon: 'success',
duration: 2000
});
this.closeDialog();
// 返回（在if内使用return，跳出循环节约运算，节约性能）
return;
}
}
// 遍历完购物车后，没有对应的item项，把goodslist的当前项放入购物车数组
arr.push(goods);
} else {
arr.push(goods);
}
// 最后，把购物车数据，存放入缓存
try {
wx.setStorageSync('cart', arr)
// 返回（在if内使用return，跳出循环节约运算，节约性能）
//关闭窗口
wx.showToast({
title: '加入购物车成功！',
icon: 'success',
duration: 2000
});
this.closeDialog();
return;
} catch (e) {
console.log(e)
}
}2. Read the shopping cart page cache to obtain product information
cart.wxml
<view class="J-shopping-cart-empty" hidden="{{iscart}}"><view class="shopping-cart-empty">
<view class="bg"></view>
<view class="cart"></view>
<text class='empty-text'>购物车空空如也</text>
<p></p>
<navigator url="/pages/goods/goods">
<a href="//m.vip.com" class="button button-primary" >
去抢购 </a>
</navigator>
</view></view> <view class="scroll" hidden="{{hidden}}"><scroll-view class="scroll" scroll-y="true">
<view class="separate"></view>
<view wx:for="{{carts}}">
<view class="cart_container">
<view wx:if="{{!item.isSelect}}">
<icon class="item-select" bindtap="switchSelect" data-index="{{index}}" data-id="{{index}}" type="circle" size="20"></icon>
</view>
<view wx:elif="{{item.isSelect}}">
<icon class="item-select" bindtap="switchSelect" data-index="{{index}}" data-id="{{index}}" type="success" color="#f0145a" size="20"></icon>
</view>
<image class="item-image" src="{{item.imgUrl}}"></image>
<import src="../template/template.wxml" />
<view class="column">
<text class="title">{{item.title}}</text>
<image bindtap="delGoods" id="img{{index}}" data-index="{{index}}" src="../../images/del.png"></image>
<view class="row">
<text class="sku-price">￥{{item.price * item.count}}</text>
<view class="sku">
<template is="quantity" data="{{ ...item,index:index}}" />
</view>
</view>
</view>
</view>
<view class="separate"></view>
</view></scroll-view></view>
<view class="bottom_total" hidden="{{hidden}}">
<view class="bottom_line"></view>
<view class="row">
<view wx:if="{{!isAllSelect}}">
<icon class="item-allselect" bindtap="allSelect" type="circle" size="20"></icon>
</view>
<view wx:elif="{{isAllSelect}}">
<icon class="item-allselect" bindtap="allSelect" type="success" color="#f0145a" size="20"></icon>
</view>
<text class="small_text">全选</text>
<text>合计:￥ </text>
<text class="price">{{totalMoney}}</text>
<button class="button-red" bindtap="toBuy" formType="submit">去结算 </button>
</view></view>cart.wxss
@import "../template/template.wxss";
page{
background: #f3f4f5;
/* font-size: 37.5px; */
}
.column image {
width:33rpx;
height:35rpx;
display:inline-block;
overflow:hidden;
float:right;
margin-top: -40rpx;
margin-left:400rpx;
}
.J-shopping-cart-empty{
margin: 0;
padding: 0;
border: 0;
font: inherit;
font-size: 100%;
vertical-align: baseline;
}
.shopping-cart-empty {
height: 250px;
padding-top: 3.2rem;
padding-bottom: 1.6rem;
background-color: #fff;
text-align: center;
position: relative;
}
.shopping-cart-empty .bg{
position: absolute;
width: 16.29333rem;
height: 6.73333rem;
background: transparent url(data:image/png;base64,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);
left: 50%;
-webkit-transform: translateX(-50%);
transform: translateX(-50%);
background-size: 100%;
top: 0;
}
.shopping-cart-empty .cart{
width: 5.83333rem;
height: 7.46rem;
background: transparent url(data:image/png;base64,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) no-repeat;
background-size: 100%;
margin: 0 auto;
}
.shopping-cart-empty .button {
width: 8.46667rem;
height: 1.5rem;
display: block;
margin: 20rpx auto;
}
.empty-text {
font-size: .64667rem;
color: #222;
margin-top: .53333rem;
line-height: .74667rem;
font-weight: 400;
}
.button-primary {
border: 1px solid #de3c96;
color: #de3c96;
text-decoration: none;
text-align: center;
display: block;
border-radius: .21267rem;
line-height: 1.5rem;
-webkit-appearance: none;
background: none;
padding: 0 .26667rem;
margin: 0;
white-space: nowrap;
position: relative;
text-overflow: ellipsis;
font-size: .74333rem;
font-family: inherit;
cursor: pointer;
user-select: none;
}
.cart_container {
display: flex;
flex-direction: row;
background-color: #FFFFFF;
margin-bottom: 10rpx;
}
.scroll {
margin-bottom: 120rpx;
}
.column {
display: flex;
flex-direction: column;
}
.row {
display: flex;
flex-direction: row;
align-items: center;
}
.sku {
margin-left: 100rpx;
position: absolute;
right: 30rpx;
margin-top: 30rpx;
}
.sku-price {
color: red;
position: relative;
margin-top: 30rpx;
}
.price {
color: red;
position: relative;
}
.title {
font-size: 32rpx;
margin-top: 40rpx;
}
.small_text {
font-size: 28rpx;
margin-right: 40rpx;
margin-left: 25rpx;
}
.item-select {
width: 40rpx;
height: 40rpx;
margin-top: 90rpx;
margin-left: 20rpx;
}
.item-allselect {
width: 40rpx;
height: 40rpx;
margin-left: 20rpx;
margin-top:25rpx;
}
.item-image {
width: 180rpx;
height: 180rpx;
margin: 20rpx;
}
.bottom_line {
width: 100%;
height: 2rpx;
background: lightgray;
}
.bottom_total {
position: fixed;
display: flex;
flex-direction: column;
bottom: 0;
width: 100%;
height: 120rpx;
line-height: 120rpx;
background: white; /* margin-top: 300rpx; */
border-top: 1rpx solid #ccc; z-index: 99;
}
.button-red {
background-color: #f0145a;
position: fixed;
right: 0;
color: white;
text-align: center;
display: inline-block;
font-size: 30rpx;
border-radius: 0rpx;
width: 30%;
height: 120rpx;
line-height: 120rpx; /* border: 1rpx solid #ccc; */
} cart.js
/**
* 页面的初始数据
*/
data: {
carts: [], //数据
iscart: false,
hidden: null,
isAllSelect: false,
totalMoney: 0,
},
onShow: function () {
// 获取产品展示页保存的缓存数据（购物车的缓存数组，没有数据，则赋予一个空数组）
var arr = wx.getStorageSync('cart') || [];
console.info("缓存数据："+arr); // 有数据的话，就遍历数据，计算总金额 和 总数量
if (arr.length > 0) {
// 更新数据
this.setData({
carts: arr,
iscart: true,
hidden: false
});
console.info("缓存数据：" + this.data.carts);
}else{
this.setData({
iscart: false,
hidden: true,
});
}
},3. Calculating shopping cart items and deleting cached items
cart.js
//勾选事件处理函数
switchSelect: function (e) {
// 获取item项的id，和数组的下标值
var Allprice = 0, i = 0;
let id = e.target.dataset.id,
index = parseInt(e.target.dataset.index);
this.data.carts[index].isSelect = !this.data.carts[index].isSelect; //价钱统计
if (this.data.carts[index].isSelect) {
this.data.totalMoney = this.data.totalMoney + (this.data.carts[index].price * this.data.carts[index].count);
} else {
this.data.totalMoney = this.data.totalMoney - (this.data.carts[index].price * this.data.carts[index].count);
}
//是否全选判断
for (i = 0; i < this.data.carts.length; i++) {
Allprice = Allprice + (this.data.carts[index].price * this.data.carts[index].count);
}
if (Allprice == this.data.totalMoney) {
this.data.isAllSelect = true;
} else {
this.data.isAllSelect = false;
}
this.setData({
carts: this.data.carts,
totalMoney: this.data.totalMoney,
isAllSelect: this.data.isAllSelect,
})
},
//全选
allSelect: function (e) {
//处理全选逻辑
let i = 0;
if (!this.data.isAllSelect) {
this.data.totalMoney = 0;
for (i = 0; i < this.data.carts.length; i++) {
this.data.carts[i].isSelect = true;
this.data.totalMoney = this.data.totalMoney + (this.data.carts[i].price * this.data.carts[i].count);
}
} else {
for (i = 0; i < this.data.carts.length; i++) {
this.data.carts[i].isSelect = false;
}
this.data.totalMoney = 0;
}
this.setData({
carts: this.data.carts,
isAllSelect: !this.data.isAllSelect,
totalMoney: this.data.totalMoney,
})
}, // 去结算
toBuy() {
wx.showToast({
title: '去结算',
icon: 'success',
duration: 3000
});
this.setData({
showDialog: !this.data.showDialog
});
}, //数量变化处理
handleQuantityChange(e) {
var componentId = e.componentId;
var quantity = e.quantity;
this.data.carts[componentId].count.quantity = quantity;
this.setData({
carts: this.data.carts,
});
},
/* 减数 */
delCount: function (e) {
var index = e.target.dataset.index;
console.log("刚刚您点击了加一");
var count = this.data.carts[index].count; // 商品总数量-1
if (count > 1) {
this.data.carts[index].count--;
}
// 将数值与状态写回
this.setData({
carts: this.data.carts
});
console.log("carts:" + this.data.carts);
this.priceCount();
},
/* 加数 */
addCount: function (e) {
var index = e.target.dataset.index;
console.log("刚刚您点击了加+");
var count = this.data.carts[index].count; // 商品总数量+1
if (count < 10) {
this.data.carts[index].count++;
}
// 将数值与状态写回
this.setData({
carts: this.data.carts
});
console.log("carts:" + this.data.carts);
this.priceCount();
},
priceCount: function (e) {
this.data.totalMoney = 0;
for (var i = 0; i < this.data.carts.length; i++) {
if (this.data.carts[i].isSelect == true) {
this.data.totalMoney = this.data.totalMoney + (this.data.carts[i].price * this.data.carts[i].count);
}
}
this.setData({
totalMoney: this.data.totalMoney,
})
},
/* 删除item */
delGoods: function (e) {
this.data.carts.splice(e.target.id.substring(3),1); // 更新data数据对象
if (this.data.carts.length > 0) {
this.setData({
carts: this.data.carts
})
wx.setStorageSync('cart', this.data.carts);
this.priceCount();
} else {
this.setData({
cart: this.data.carts,
iscart: false,
hidden: true,
})
wx.setStorageSync('cart', []);
}
}Related recommendations:
WeChat Mini Program Mall Development Dynamic API Classifies Products (Code)
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