/* pages/cart/cart.wxss */ .cart_container { display: flex; flex-direction: row; } .scroll { margin-bottom: 120rpx; } .column { display: flex; flex-direction: column; } .row { display: flex; flex-direction: row; align-items: center; } .sku { margin-top: 60rpx; margin-left: 100rpx; } .sku-price { color: red; position: relative; margin-top: 70rpx; } .price { color: red; position: relative; } .title { font-size: 38rpx; margin-top: 40rpx; } .small_text { font-size: 28rpx; margin-right: 40rpx; margin-left: 10rpx; } .item-select { width: 40rpx; height: 40rpx; margin-top: 90rpx; margin-left: 20rpx; } .item-allselect { width: 40rpx; height: 40rpx; margin-left: 20rpx; } .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; } .button-red { background-color: #f44336; /* 红色 */ } button { 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; } |
// pages/cart/cart.js var Temp = require('../../template/contract.js'); Page(Object.assign({}, Temp.Quantity, { data: { isAllSelect:false, totalMoney:0, // 商品详情介绍 carts: [ { pic: "http://www.lanrenmb.com/files/product/20161201/148058328876.jpg", name:"日本资生堂洗颜", price:200, isSelect:false, // 数据设定 count: { quantity: 2, min: 1, max: 20 }, }, { pic: 'http://www.lanrenmb.com/files/product/20161201/148058301941.jpg', name: "倩碧焕妍活力精华露", price: 340, isSelect: false, // 数据设定 count: { quantity: 1, min: 1, max: 20 }, }, { pic: 'http://www.lanrenmb.com/files/product/20161201/14805828016.jpg', name: "特效润肤露", price: 390, isSelect: false, // 数据设定 count: { quantity: 3, min: 1, max: 20 }, }, { pic: 'http://www.lanrenmb.com/files/product/20161201/148058228431.jpg', name: "倩碧水嫩保湿精华面霜", price: 490, isSelect: false, // 数据设定 count: { quantity: 1, min: 1, max: 20 }, }, { pic: 'http://www.lanrenmb.com/files/product/20161201/148057953326.jpg', name: "兰蔻清莹柔肤爽肤水", price: 289, isSelect: false, // 数据设定 count: { quantity: 10, min: 1, max: 20 }, }, { pic: "http://www.lanrenmb.com/files/product/20161201/148057921620_middle.jpg", name: "LANCOME兰蔻小黑瓶精华", price: 230, isSelect: false, // 数据设定 count: { quantity: 1, min: 1, max: 20 }, }, ], }, //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; } else { this.data.totalMoney = this.data.totalMoney - this.data.carts[index].price; } //是否全选判断 for (i = 0; i < this.data.carts.length; i++) { Allprice = Allprice + this.data.carts[i].price; } 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) { 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; } } 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, }); } })); |
1. 全选就把每个item勾选图标点亮,然后统计总价钱,不全选就置为灰色,总价钱为0 2. this.setData更新数据 |
1. 判断是否达到全部勾选,如果全部勾选,底部的全选按钮要点亮,判断依据是,价钱是否等于总价,当然这只是一种判断方式,读者也可以通过勾选的数量判断, 2. 对勾选或取消的按钮,进行总价的加减法计算 3. this.setData,更新数据,这个是重点,每次处理完数据,都要记得更新数据 |
<import src="/template/quantity/index.wxml" /> <scroll-view class="scroll" scroll-y="true"> <view class="separate"></view> <view wx:for="{{carts}}"> <view class="cart_container"> <image class="item-select" bindtap="switchSelect" data-index="{{index}}" data-id="{{index}}" src="{{item.isSelect?'../../images/cart/comment_select.png':'../../images/cart/comment_normal.png'}}" /> <image class="item-image" src="{{item.pic}}"></image> <view class="column"> <text class="title">{{item.name}}</text> <view class="row"> <text class="sku-price">¥</text> <text class="sku-price">{{item.price}}</text> <view class="sku"> <template is="quantity" data="{{ ...item.count, componentId: index }}" /> </view> </view> </view> </view> <view class="separate"></view> </view> </scroll-view> <view class="bottom_total"> <view class="bottom_line"></view> <view class="row"> <image class="item-allselect" bindtap="allSelect" src="{{isAllSelect?'../../images/cart/comment_select.png':'../../images/cart/comment_normal.png'}}" /> <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> |
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