微信小程序实现简单购物车功能

 
  
  
  
  
 
  
  
   {{item.title}}
 
   
   
   -
   
   +
   
 
   ￥{{item.price}}
  
  
 
 
 
 
 
  
  
  全选
 
 
 去结算
 
 
 合计：￥{{totalPrice}}
 

onShow() {
 this.getTotalPrice();
}

// 统计总价
getTotalPrice() {
 // 获取购物车列表
 let dataArr = this.data.dataArr;
 let total = 0;
 // 循环列表
 for(let i = 0; i

// 选择事件
selectList(e) {
 // 获取data- 传进来的index
 let index = e.currentTarget.dataset.index;
 // 获取购物车列表
 let dataArr = this.data.dataArr;
 // 获取当前商品的选中状态
 let selected = dataArr[index].selected;
 // 改变状态
 dataArr[index].selected = !selected;
 this.setData({
 dataArr: dataArr
 });
 
 // 改变全选状态
 for (var i=0; i

// 全选事件
selectAll(e) {
 // 是否全选状态
 let selectAllStatus = this.data.selectAllStatus;
 selectAllStatus = !selectAllStatus;
 let dataArr = this.data.dataArr;
 for (let i = 0; i 

// 增加数量
addCount(e) {
 let index = e.currentTarget.dataset.index;
 let dataArr = this.data.dataArr;
 let num = dataArr[index].num;
 num = num + 1;
 dataArr[index].num = num;
 this.setData({
 dataArr: dataArr
 });
 // 重新统计总价
 this.getTotalPrice();
},
 
// 减少数量
minusCount(e) {
 let index = e.currentTarget.dataset.index;
 let dataArr = this.data.dataArr;
 let num = dataArr[index].num;
 if(num <= 1){
 wx.showToast({
  title: '宝贝不能再减少啦',
  icon: 'none'
 })
 return false;
 }
 num = num - 1;
 dataArr[index].num = num;
 this.setData({
 dataArr: dataArr
 });
 // 重新统计总价
 this.getTotalPrice();
}

// 输入数量
inputCount(e) {
 let index = e.currentTarget.dataset.index;
 let dataArr = this.data.dataArr;
 let num = e.detail.value;
 dataArr[index].num = num;
 this.setData({
 dataArr: dataArr
 });
 // 重新统计总价
 this.getTotalPrice();
}

// 失去焦点时判断数量是否小于1
bindblur(e) {
 let index = e.currentTarget.dataset.index;
 let dataArr = this.data.dataArr;
 let num = e.detail.value;
 if(num <1){
 wx.showToast({
  title: '数量不能小于1',
  icon: 'none'
 })
 num = 1;
 dataArr[index].num = num;
 this.setData({
  dataArr: dataArr
 });
 // 重新统计总价
 this.getTotalPrice();
 }
}

// 去结算
toOrder() {
 // 处理数据
 // *****
 // Author: Moss
 // QQ: 827291427
 // *****
 
 // 跳转结算页面
 wx.navigateTo({
 url: '/pages/shop/order/order'
 })
}