微信小程序期末大作业-精品优购商城

import {showToast} from '../../utils/asyncWx' Page({ data: { address:{}, cart:[], allSelected:false, totalPrice:0, totalNum:0 }, onShow() { //获取缓存中的收货地址数据 let address = wx.getStorageSync('address'); //获取缓存中的购物车数据 let cart = wx.getStorageSync('cart') || []; //单独设置address this.setData({ address }); this.setCart(cart); }, handleChooseAddress() { //调用微信内置的api获取收货地址 wx.chooseAddress({ success: (result) => { wx.setStorageSync('address', result) }, }) }, //改变select的选项 handleChangeSelect(e) { //通过点击的商品，把该商品的data和缓存中的值改变 //1.取出商品的id值 let {id} = e.currentTarget.dataset; //找到数组中的该商品，然后修改 let {cart} = this.data; let currentGood = cart.find((item) => id === item.goods_id); //将商品的选择状态修改 currentGood.isSelected = !currentGood.isSelected; //写回data数据中 // this.setData({ // cart // }); console.log(cart); //设置缓存 wx.setStorageSync('cart', cart); this.setCart(cart); }, // handleAllSelect() { // console.log('hello world'); //先拿到全选的值 let {cart,allSelected} = this.data; allSelected = !allSelected; //改变商品数组中所有的选中状态 cart.forEach(item => item.isSelected = allSelected); this.setData({ cart }); this.setCart(cart); }, //加减数量 handleItemNumbleEdit(e) { //取出goods_id 和 type const {id:goods_id,type} = e.currentTarget.dataset; let {cart} = this.data; //找到需要修改的商品 var currentGood = cart.find(item => item.goods_id === goods_id); let goodIndex = cart.findIndex(item => item.goods_id === goods_id); if(currentGood.num === 1 && type === -1) { // wx.showToast({ // title: '不能在减了哦', // duration: 2000 // }) wx.showModal({ title: '删除', content: '确定要删除该商品吗', success: res => { if (res.confirm) { cart.splice(goodIndex,1); //写回data this.setCart(cart); //写回缓存 wx.setStorageSync('cart', cart); } else if (res.cancel) { currentGood.num = 1; console.log('用户点击取消') } } }) }else { currentGood.num += type; //写回data this.setCart(cart); //写回缓存 wx.setStorageSync('cart', cart); } }, //结算功能实现 async handlePay() { const {address,totalNum} = this.data; //1.判断地址存不存在 if(!address.userName) { await showToast('请填写你的收货地址') return; } //判断是否选购了商品 // if(totalNum == 0) { // await showToast('请先去选购商品'); // return; // } //如果走到这里说明选了商品和地址 wx.navigateTo({ url: '/pages/pay/index', }) }, //设置购物车状态 包括钱，数量， setCart(cart) { //计算是不是全选 let allSelected = cart.length ==0 ? false : true; //计算总价格 let totalPrice = 0; let totalNum = 0; cart.forEach(item => { if(item.isSelected) { totalPrice += item.goods_price * item.num; totalNum += item.num; }else { allSelected = false; } }); this.setData({ cart, allSelected, totalPrice, totalNum }) } })