小程序实现完整购物车[全选/反选计算金额/加减计算数量跟金额]，供大家参考，具体内容如下
一、wxml页面代码模块
<view wx:if="{{hasList}}">
<view class="order_list">
<view class="order" wx:for="{{list}}" wx:key="{{index}}">
<view class="xuanze" wx:if="{{item.selected}}" catchtap="selectList" data-index="{{index}}">
<image src="/images/serch/xuanze.png" />
</view>
<view class="xuanze" catchtap="selectList" data-index="{{index}}" wx:else>
<image src="/images/serch/gouxuan.png" />
</view>
<!--列表商品图片-->
<view class="order_img">
<image src="{{item.image}}" />
</view>
<view class="order_text">
<view class="text_top">
<!--列表标题-->
<view class="title">{{item.title}}</view>
<view class="detel" catchtap="deletes" data-index="{{index}}">
<image src="/images/serch/detel.png" />
</view>
</view>
<!--规格-->
<view class="size">规格：{{item.pro_name}}</view>
<view class="text_bottom">
<!--价格-->
<view class="money">￥{{item.price}}</view>
<!--商品数量加减-->
<view class="number">
<!--减按钮-->
<view class="reduce" catchtap="btn_minus" data-obj="{{obj}}" data-index="{{index}}">
<!--按钮图片-->
<image src="/images/serch/jian-1.png" />
</view>
<!--数量-->
<view class="numb">{{item.num}}</view>
<!--加按钮-->
<view class="add" catchtap="btn_add" data-index="{{index}}">
<!--按钮图片-->
<image src="/images/serch/add-1.png" />
</view>
</view>
</view>
</view>
</view>
</view>
<!--固定底部-->
<view class="buy">
<view class="buy_top">
<view class="top_left">
<view class="left_img" catchtap="selectAll" wx:if="{{selectAllStatus}}">
<image src="/images/serch/gouxuan.png" />
</view>
<view class="left_img" catchtap="selectAll" wx:else>
<image src="/images/serch/gouxuan.png" />
</view>
<view class="left_name">全选</view>
</view>
<view class="top_left">
<view class="left_img">
<image src="/images/serch/fenxiang.png" />
</view>
<view class="left_name">分享</view>
</view>
</view>
<view class="buy_bottom">
<view class="buy_left">
<view class="heji">合计：￥{{totalPrice}}</view>
</view>
<view class="buy_right">
<!--提交订单-->
<view class="liji " catchtap="btn_submit_order">立即购买</view>
<view class="liji two active">预约试衣</view>
</view>
</view>
</view>
</view>
<!--购物车没订单-->
<view wx:else>
<view class="list_none">购物车是空的哦~</view>
</view>
二、样式代码
page {
background-color: rgba(238, 238, 238, 0.5);
}
.order {
height: 238rpx;
background-color: #fefeff;
margin: 27rpx;
border-radius: 4rpx;
display: flex;
align-items: center;
}
.xuanze {
width: 40rpx;
height: 40rpx;
/* background-color: darkgoldenrod; */
border-radius: 50%;
margin: 0 11rpx;
}
.xuanze image {
width: 100%;
height: 100%;
display: block;
border-radius: 50%;
}
.order_img {
width: 180rpx;
height: 180rpx;
}
.order_img image {
width: 100%;
height: 100%;
display: block;
}
.order_text {
margin-left: 20rpx;
width: 58%;
height: 180rpx;
}
.text_top {
display: flex;
justify-content: space-between;
align-items: center;
}
.title {
width: 70%;
font-size: 28rpx;
color: #4b5248;
display: -webkit-box;
-webkit-box-orient: vertical;
-webkit-line-clamp: 1;
overflow: hidden;
}
.detel {
width: 30rpx;
height: 30rpx;
}
.detel image {
width: 100%;
height: 100%;
display: block;
}
.size {
font-size: 24rpx;
color: #a8ada6;
}
.text_bottom {
display: flex;
margin-top: 50rpx;
align-items: center;
justify-content: space-between;
}
.money {
font-size: 30rpx;
color: #a5937f;
}
.number {
display: flex;
justify-content: space-around;
align-items: center;
width: 170rpx;
}
.reduce {
width: 46rpx;
height: 46rpx;
}
.reduce image {
width: 100%;
height: 100%;
display: block;
}
.numb {
font-size: 30rpx;
color: #a5937f;
}
.add {
width: 46rpx;
height: 46rpx;
}
.add image {
width: 100%;
height: 100%;
display: block;
}
/*购买按钮*/
.buy {
height: 180rpx;
width: 696rpx;
position: fixed;
left: 27rpx;
bottom: 41rpx;
background-color: #555555f3;
border-radius: 4rpx;
}
.buy_top {
border-bottom: 1px solid rgb(98, 98, 99);
height: 75rpx;
display: flex;
align-items: center;
justify-content: space-between;
}
.top_left {
display: flex;
align-items: center;
}
.left_img {
width: 37rpx;
height: 37rpx;
margin: 11rpx;
}
.left_img image {
width: 100%;
height: 100%;
display: block;
}
.left_name {
font-size: 24rpx;
color: #fefeff;
margin-right: 29rpx;
}
.buy_bottom {
display: flex;
height: 104rpx;
justify-content: space-between;
align-items: center;
padding: 0rpx 30rpx 0rpx 12rpx;
}
.buy_left {
font-size: 26rpx;
color: #fff;
}
.buy_right {
display: flex;
align-items: center;
}
.liji {
width: 180rpx;
height: 70rpx;
border: 2rpx solid rgba(248, 248, 248, 1);
box-sizing: border-box;
border-radius: 4rpx;
line-height: 70rpx;
text-align: center;
font-size: 26rpx;
color: #FEFEFF;
}
.two{
margin-left: 12rpx;
}
.active{
background-color: #A5937F;
border: none;
}
三、js代码模块
Page({
/**
* 页面的初始数据
*/
data: {
hasList: true, //默认展示列表数据
//商品列表数据
list: [{
id: 1,
title: '园艺大师抗皱精华露',
image: '/images/serch/2.png',
pro_name: "30ml",
num: 1,
price: 180,
selected: true
},
{
id: 2,
title: '伊芙琳玫瑰护手霜',
image: '/images/serch/1.png',
pro_name: "25g",
num: 1,
price: 62,
selected: true
},
{
id: 2,
title: '燕麦山羊乳舒缓护手霜',
image: '/images/serch/2.png',
pro_name: "75ml",
num: 1,
price: 175,
selected: true
}
],
//金额
totalPrice: 0, //总价，初始为0
//全选状态
selectAllStatus: true, // 全选状态，默认全选
},
/**
* 生命周期函数--监听页面加载
*/
onLoad: function(options) {
},
/**
* 生命周期函数--监听页面显示
*/
onShow: function() {
wx.showToast({
title: '加载中',
icon: "loading",
duration: 1000
})
// 价格方法
this.count_price();
},
/** 当前商品选中事件 */
selectList(e) {
var that = this;
//获取选中的 radio索引
var index = e.currentTarget.dataset.index;
//获取到商品列表数据
var list = that.data.list;
//默认全选
that.data.selectAllStatus = true;
//循环数组数据，判断--选中/未选中[selected]
list[index].selected = !list[index].selected;
//如果数组数据全部为selected[true],全选
for (var i = list.length - 1; i >= 0; i--) {
if (!list[i].selected) {
that.data.selectAllStatus = false;
break;
}
}
// 重新渲染数据
that.setData({
list: list,
selectAllStatus: that.data.selectAllStatus
})
// 调用计算金额方法
that.count_price();
},
// 删除
deletes(e) {
var that = this;
// 获取索引
const index = e.currentTarget.dataset.index;
// 获取商品列表数据
let list = this.data.list;
wx.showModal({
title: '提示',
content: '确认删除吗',
success: function(res) {
if (res.confirm) {
// 删除索引从1
list.splice(index, 1);
// 页面渲染数据
that.setData({
list: list
});
// 如果数据为空
if (!list.length) {
that.setData({
hasList: false
});
} else {
// 调用金额渲染数据
that.count_price();
}
} else {
console.log(res);
}
},
fail: function(res) {
console.log(res);
}
})
},
/** 购物车全选事件 */
selectAll(e) {
// 全选ICON默认选中
let selectAllStatus = this.data.selectAllStatus;
// true ----- false
selectAllStatus = !selectAllStatus;
// 获取商品数据
let list = this.data.list;
// 循环遍历判断列表中的数据是否选中
for (let i = 0; i < list.length; i ) {
list[i].selected = selectAllStatus;
}
// 页面重新渲染
this.setData({
selectAllStatus: selectAllStatus,
list: list
});
// 计算金额方法
this.count_price();
},
/** 绑定加数量事件 */
btn_add(e) {
// 获取点击的索引
const index = e.currentTarget.dataset.index;
// 获取商品数据
let list = this.data.list;
// 获取商品数量
let num = list[index].num;
// 点击递增
num = num 1;
list[index].num = num;
// 重新渲染 ---显示新的数量
this.setData({
list: list
});
// 计算金额方法
this.count_price();
},
/**
* 绑定减数量事件
*/
btn_minus(e) {
// // 获取点击的索引
const index = e.currentTarget.dataset.index;
// const obj = e.currentTarget.dataset.obj;
// console.log(obj);
// 获取商品数据
let list = this.data.list;
// 获取商品数量
let num = list[index].num;
// 判断num小于等于1 return; 点击无效
if (num <= 1) {
return false;
}
// else num大于1 点击减按钮 数量--
num = num - 1;
list[index].num = num;
// 渲染页面
this.setData({
list: list
});
// 调用计算金额方法
this.count_price();
},
// 提交订单
btn_submit_order() {
var that = this;
console.log(that.data.totalPrice);
// 调起支付
// wx.requestPayment(
// {
// 'timeStamp': '',
// 'nonceStr': '',
// 'package': '',
// 'signType': 'MD5',
// 'paySign': '',
// 'success': function (res) { },
// 'fail': function (res) { },
// 'complete': function (res) { }
// })
wx.showModal({
title: '提示',
content: '合计金额-' that.data.totalPrice "暂未开发",
})
},
/**
* 计算总价
*/
count_price() {
// 获取商品列表数据
let list = this.data.list;
// 声明一个变量接收数组列表price
let total = 0;
// 循环列表得到每个数据
for (let i = 0; i < list.length; i ) {
// 判断选中计算价格
if (list[i].selected) {
// 所有价格加起来 count_money
total = list[i].num * list[i].price;
}
}
// 最后赋值到data中渲染到页面
this.setData({
list: list,
totalPrice: total.toFixed(2)
});
},
})
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持Devmax。