小程序轮播图的两种后台方式(jsp)-小程序

const fetch = require('../../utils/fetch.js') Page({ data: { activeIndex: 0, toView: "a0", cartList: [], currentType: 0, currentIndex: 0, sumMonney: 0, // 总价钱 cupNumber: 0, // 购物车里商品的总数量 showCart: false, // 是否展开购物车 loading: false, containerH: '', heightArr: [] // 数组:查找到的所有单元的内容高度 }, onLoad: function(options) { // 显示模态对话框 wx.showLoading({ title: "努力加载中" }) // 请求数据 fetch('food/list.json').then((res) => { wx.hideLoading(); this.setData({ listData: res.data, loading: true }) }) }, // 点击左侧菜单项选择 selectMenu: function(e) { let index = e.currentTarget.dataset.index console.log(index) this.setData({ activeIndex: index, toView: "a" + index, }) }, // 加入购物车 addToCart: function(e) { console.log(e) var type = e.currentTarget.dataset.type; var index = e.currentTarget.dataset.index; this.setData({ currentType: type, currentIndex: index, }); var a = this.data // 声明数组addItem var addItem = { "name": a.listData[a.currentType].foods[a.currentIndex].name, "price": a.listData[a.currentType].foods[a.currentIndex].specfoods[0].price, "number": 1, "sum": a.listData[a.currentType].foods[a.currentIndex].specfoods[0].price, } var sumMonney = a.sumMonney + a.listData[a.currentType].foods[a.currentIndex].specfoods[0].price; // 把新数组(addItem) push到 原数组cartList var cartList = this.data.cartList; cartList.push(addItem); this.setData({ cartList: cartList, showModalStatus: false, sumMonney: sumMonney, cupNumber: a.cupNumber + 1 }); }, // 展开购物车 showCartList: function() { if (this.data.cartList.length != 0) { this.setData({ showCart: !this.data.showCart, }); } }, // 购物车添加商品数量 addNumber: function(e) { var index = e.currentTarget.dataset.index; var cartList = this.data.cartList; cartList[index].number++; var sum = this.data.sumMonney + cartList[index].price; cartList[index].sum += cartList[index].price; this.setData({ cartList: cartList, sumMonney: sum, cupNumber: this.data.cupNumber + 1 }) }, // 购物车减少商品数量 decNumber: function(e) { var index = e.currentTarget.dataset.index; var cartList = this.data.cartList; var sum = this.data.sumMonney - cartList[index].price; cartList[index].sum -= cartList[index].price; cartList[index].number == 1 ? cartList.splice(index, 1) : cartList[index].number--; this.setData({ cartList: cartList, sumMonney: sum, showCart: cartList.length == 0 ? false : true, cupNumber: this.data.cupNumber - 1 }); }, // 清空购物车 clearCartList: function() { this.setData({ cartList: [], showCart: false, sumMonney: 0, cupNumber: 0 }); }, // 点击"选好了"，缓存购物车的值 goBalance: function(e) { if (this.data.sumMonney == 0) { return } // 请求接口返回参数{error: 0（错误代码）, order_id: 1}} var order_id = this.data.order_id var method = "POST" fetch("food/order", {id: 1,num: 1}, method).then(function(res) { if (res.data.error !== 0) { wx.showModal({ title: '下单失败', content: '操作失败请重试', }) return } // 请求成功后跳转到订单确认页面，把返回的order_id订单编号传过去 wx.navigateTo({ url: '../order/balance/balance?order_id=' + res.data.order_id }) }) } })