橙色商城首页布局果蔬店网上销售的微信小程序模板下载.zip

// page/component/new-pages/cart/cart.js Page({ data: { carts:[], // 购物车列表 hasList:false, // 列表是否有数据 totalPrice:0, // 总价，初始为0 selectAllStatus:true, // 全选状态，默认全选 obj:{ name:"hello" } }, onShow() { var self = this; this.setData({ hasList: true, }); wx.getStorage({ key: 'carts', success:function(res){ if(!res.data.length){ self.setData({ hasList: false }) } self.setData({ carts : res.data }) self.getTotalPrice(); } }) }, onHide(){ let carts = this.data.carts; wx.setStorage({ data: carts, key: 'carts', }) }, /** * 当前商品选中事件 */ selectList(e) { const index = e.currentTarget.dataset.index; let carts = this.data.carts; const selected = carts[index].selected; carts[index].selected = !selected; this.setData({ carts: carts }); this.getTotalPrice(); }, /** * 删除购物车当前商品 */ deleteList(e) { const index = e.currentTarget.dataset.index; let carts = this.data.carts; carts.splice(index,1); this.setData({ carts: carts }); if(!carts.length){ this.setData({ hasList: false }); }else{ this.getTotalPrice(); } }, /** * 购物车全选事件 */ selectAll(e) { let selectAllStatus = this.data.selectAllStatus; selectAllStatus = !selectAllStatus; let carts = this.data.carts; for (let i = 0; i < carts.length; i++) { carts[i].selected = selectAllStatus; } this.setData({ selectAllStatus: selectAllStatus, carts: carts }); this.getTotalPrice(); }, /** * 绑定加数量事件 */ addCount(e) { const index = e.currentTarget.dataset.index; let carts = this.data.carts; let num = carts[index].num; num = num + 1; carts[index].num = num; this.setData({ carts: carts }); this.getTotalPrice(); }, /** * 绑定减数量事件 */ minusCount(e) { const index = e.currentTarget.dataset.index; const obj = e.currentTarget.dataset.obj; let carts = this.data.carts; let num = carts[index].num; if(num <= 1){ return false; } num = num - 1; carts[index].num = num; this.setData({ carts: carts }); this.getTotalPrice(); }, /** * 计算总价 */ getTotalPrice() { let carts = this.data.carts; // 获取购物车列表 let total = 0; for(let i = 0; i<carts.length; i++) { // 循环列表得到每个数据 if(carts[i].selected) { // 判断选中才会计算价格 total += carts[i].num * carts[i].price; // 所有价格加起来 } } this.setData({ // 最后赋值到data中渲染到页面 carts: carts, totalPrice: total.toFixed(2) }); } })