用Vue实现购物车组件

╰+攻爆jí腚メ 2023-02-16 12:29 227阅读 0赞

### **前言** ###

本实例主要介绍利用Vue实现购物车组件，顶部可以切换标签“全部”、“好评”和“买过”的数据，标签“全部”下还可以切换不同分类显示商品；也可对商品进行加减，并进行跨标签和跨分类的最终价合计；

最终效果：

![format_png][]

### **实现过程** ###

一. 子组件代码如下（shoppingCart.vue），原理分析：

1. 切换标签函数toggleType，点击时，赋值this.currentIndex = index，同时利用计算属性更新menu的值，从而实现切换标签数据功能；而this.menuTypeIndex = 0为了解决从多分类到少分类切换报错的问题；

2. 切换分类函数toggleGoods，点击时，赋值this.menuTypeIndex = index，同时利用计算属性更新goods的值，从而实现切换分类数据功能；

3. 添加函数clickAdd，每次点击时，数量加1，同时利用JQ实现一个商品图片从上往下掉落到配送员箱子的过程；然后箱子的数字加1，并增加原价、优惠价和配送费用等；

4. 减少函数clickMinus，每次点击时，数量减1，同时减少原价、优惠价和配送费用等。

<template>
      <div class="sc-box">
        <div class="sc-type">
          <ul>
            <li :class="{active:currentIndex === index}" v-for="(item, index) in goodsList" :key="index" data-index="index" @click="toggleType(index)">{
       {item.type}}</li>
          </ul>
        </div>
        <div class="sc-content">
          <div class="sc-leftMenu" v-if="menu.length > 1">
            <ul>
              <li :class="{active:menuTypeIndex === index}" v-for="(item, index) in menu" :key="index" data-index="index" @click="toggleGoods(index)">{
       {item.menuType}}</li>
            </ul>
          </div>
          <div class="sc-goods">
            <ul>
              <li v-for="(item, index) in goods" :key="index" data-index="index">
                <img :class="'goods-image'+index" :src="item.imgSrc" alt="" />
                <div class="goods-mes">
                  <div class="goods-name">{
       {item.name}}</div>
                  <div class="goods-description">{
       {item.description}}</div>
                  <div class="goods-price"><span>¥</span>{
       {item.price}}<span class="originalPrice">¥{
       {item.originalPrice}}</span></div>
                  <div class="goods-buttons">
                    <span class="button minus" @click="clickMinus(index)" v-if="item.number !== 0"><img src="../assets/images/shoppingCart/minus.png" alt="" /></span>
                    <span class="number" v-if="item.number !== 0">{
       {item.number}}</span>
                    <span class="button add" @click="clickAdd(index)"><img src="../assets/images/shoppingCart/add.png" alt="" /></span>
                  </div>
                </div>
              </li>
            </ul>
          </div>
        </div>
        <div class="sc-operation">
          <div class="sc-contact">
            <img src="../assets/images/shoppingCart/contact.png" alt="" />
            <span>联系商家</span>
          </div>
          <div class="sc-deliveryMes">
            <div class="deliveryNumber"><img src="../assets/images/shoppingCart/delivery.png" alt="" /><span v-if="count!==0">{
       {count}}</span></div>
            <div class="priceMes">
              <div class="totalPrice">¥{
       {totalPrice}}<span>¥{
       {originalTotalPrice}}</span></div>
              <div class="deliveryMes">另需配送费¥{
       {totalDeliveryCost}}<span v-if="totalDeliveryCost !== 0">¥{
       {totalOriginalDeliveryCost}}</span> 支持自取</div>
            </div>
          </div>
          <div class="sc-pay" @click="clickPay">去结算</div>
        </div>
      </div>
    </template>
    <script>
    import $ from 'jquery'
    export default {
      props: {},
      data() {
        return {
          currentIndex: 0, // 当前类型index
          menuTypeIndex: 0, // 左边菜单index
          goodsList: [{ // 整个商品数据
              type: '全部',
              menu: [{
                menuType: '推荐',
                goods: [{
                    name: '排骨饭套餐',
                    imgSrc: require('../assets/images/shoppingCart/timg1.jpg'),
                    description: '物美价廉',
                    price: 15.50,
                    originalPrice: 25.36,
                    number: 0,
                    deliveryCost: 1,
                    originalDeliveryCost: 2,
                  },
                  {
                    name: '宫保鸡丁套餐',
                    imgSrc: require('../assets/images/shoppingCart/timg2.jpg'),
                    description: '物美价廉',
                    price: 5.50,
                    originalPrice: 25.36,
                    number: 0,
                    deliveryCost: 2,
                    originalDeliveryCost: 4,
                  }
                ]
              }, {
                menuType: '折扣',
                goods: [{
                  name: '排骨饭套餐',
                  imgSrc: require('../assets/images/shoppingCart/timg1.jpg'),
                  description: '物美价廉',
                  price: 15.50,
                  originalPrice: 25.36,
                  number: 0,
                  deliveryCost: 1,
                  originalDeliveryCost: 2,
                }]
              }]
            },
            {
              type: '好评',
              menu: [{
                menuType: '推荐',
                goods: [{
                  name: '排骨饭套餐',
                  imgSrc: require('../assets/images/shoppingCart/timg1.jpg'),
                  description: '物美价廉',
                  price: 15.50,
                  originalPrice: 25.36,
                  number: 0,
                  deliveryCost: 1,
                  originalDeliveryCost: 2,
                }]
              }]
            },
            {
              type: '买过',
              menu: [{
                menuType: '推荐',
                goods: [{
                    name: '排骨饭套餐',
                    imgSrc: require('../assets/images/shoppingCart/timg1.jpg'),
                    description: '物美价廉',
                    price: 15.50,
                    originalPrice: 25.36,
                    number: 0,
                    deliveryCost: 1,
                    originalDeliveryCost: 2,
                  },
                  {
                    name: '宫保鸡丁套餐',
                    imgSrc: require('../assets/images/shoppingCart/timg2.jpg'),
                    description: '物美价廉',
                    price: 5.50,
                    originalPrice: 25.36,
                    number: 0,
                    deliveryCost: 2,
                    originalDeliveryCost: 4,
                  }
                ]
              }]
            }
          ],
          count: 0, // 总数量
          originalTotalPrice: 0, // 原总价
          totalPrice: 0, // 总价
          totalDeliveryCost: 0, // 优惠后总运费
          totalOriginalDeliveryCost: 0, // 总运费
          flag: true // 用来判断是否执行动画
        }
      },
      mounted() {},
      computed: {
        menu() {
          return this.goodsList[this.currentIndex].menu;
        },
        goods() {
          return this.menu[this.menuTypeIndex].goods;
        }
      },
      methods: {
        toggleType(index) {
          this.currentIndex = index;
          this.menuTypeIndex = 0; // 默认menu第一个，解决非第一个切换时报错
        },
        toggleGoods(index) {
          this.menuTypeIndex = index;
        },
        clickMinus(index) {
          this.goods[index].number -= 1;
          this.count -= 1;
          // 价格变化
          this.originalTotalPrice -= parseFloat(this.goods[index].originalPrice); // 原总价增加
          this.totalPrice -= parseFloat(this.goods[index].price); // 优惠总价增加
          this.totalDeliveryCost -= this.goods[index].deliveryCost; // 优惠总配送费增加
          this.totalOriginalDeliveryCost -= this.goods[index].originalDeliveryCost; // 优惠总配送费增加
        },
        clickAdd(index) {
          if (this.flag) {
            this.flag = false;
            this.goods[index].number += 1;
    
            let that = this;
            // 动画跳动效果
            let count = that.count + 1;
            let originalTotalPrice = parseFloat(that.originalTotalPrice) + parseFloat(that.goods[index].originalPrice); // 原总价增加
            let totalPrice = parseFloat(that.totalPrice) + parseFloat(that.goods[index].price); // 优惠总价增加
            let totalDeliveryCost = that.totalDeliveryCost + that.goods[index].deliveryCost; // 优惠总配送费增加
            let totalOriginalDeliveryCost = that.totalOriginalDeliveryCost + that.goods[index].originalDeliveryCost; // 优惠总配送费增加
            let $initImg = $('.goods-image' + index); // 被复制的图片对象
            let $targetLocation = $('.deliveryNumber img'); // 目标购物车的图片对象
            let $moveImg = $initImg.clone().css({ // 生成点击添加行的图片副本，并变成圆形
              'position': 'absolute',
              'z-index': 99,
              'width': $initImg.width() * 0.5,
              'height': $initImg.height() * 0.5,
              'border-radius': '50%'
            }).css($initImg.offset()).appendTo('body'); // 并把位移到图片位置且添加到body
            $moveImg
              .animate({ // 先匀速向左上
                left: $initImg.offset().left - 30,
                top: $initImg.offset().top - 50
              }, 200, 'linear')
              .animate({ // 然后慢慢移到目标位置
                left: $targetLocation.offset().left + $targetLocation.width() - $moveImg.width() * 1.5,
                top: $targetLocation.offset().top + $targetLocation.height() - $moveImg.height() * 1.5
              }, 600, () => {
                $moveImg.fadeOut(100, () => { // 最后慢慢消失
                  $moveImg.detach(); // 删除掉移动对象$moveImg
                  that.count = count;
                  // 价格变化
                  that.originalTotalPrice = originalTotalPrice.toFixed(2);
                  that.totalPrice = totalPrice.toFixed(2);
                  that.totalDeliveryCost = totalDeliveryCost;
                  that.totalOriginalDeliveryCost = totalOriginalDeliveryCost;
    
                  this.flag = true;
                });
              })
          };
        },
        clickPay() {
          console.log(this.totalPrice, this.totalDeliveryCost);
        }
      }
    }
    
    </script>
    <style lang="less" scoped>
    .sc-box {
      position: relative;
      margin: 20px;
      width: 375px;
      height: 667px;
      background-color: #fff;
    
      .sc-type {
        li {
          display: inline-block;
          background-color: #f5f5f5;
          color: #616161;
          margin-right: 10px;
          height: 32px;
          line-height: 32px;
          width: 80px;
          text-align: center;
          border-radius: 8px;
          cursor: pointer;
          transition: all 0.3s;
    
          &.active {
            background-image: linear-gradient(to right, #fedb39, #febb2e);
            color: #000;
            font-weight: bold;
          }
        }
      }
    
      .sc-content {
        margin-top: 30px;
        height: 546px;
        display: flex;
        overflow-y: auto;
    
        .sc-leftMenu {
          height: 100%;
          width: 80px;
          text-align: center;
          background-color: #f5f9fc;
          color: #616161;
    
          li {
            cursor: pointer;
            transition: all 0.3s;
            height: 50px;
            line-height: 50px;
    
            &.active {
              background-color: #fff;
              font-weight: bold;
              color: #000;
            }
          }
        }
    
        .sc-goods {
          margin: 0 10px;
          width: 100%;
    
          li {
            position: relative;
            display: flex;
            margin-bottom: 15px;
    
            img {
              width: 70px;
              height: 70px;
              border-radius: 8px;
            }
    
            .goods-mes {
              margin-left: 8px;
    
              .goods-name {
                font-size: 16px;
                font-weight: bold;
              }
    
              .goods-description {
                margin-top: 6px;
                color: #616161;
                font-size: 12px;
              }
    
              .goods-price {
                margin-top: 10px;
                color: #ff6262;
                font-size: 16px;
    
                span {
                  font-size: 12px;
    
                  &.originalPrice {
                    color: #b4b4b4;
                    margin-left: 4px;
                    text-decoration: line-through;
                  }
                }
              }
    
              .goods-buttons {
                position: absolute;
                bottom: 0;
                right: 0;
    
                .button {
                  display: inline-block;
                  width: 20px;
                  height: 20px;
                  line-height: 20px;
                  text-align: center;
                  border-radius: 50%;
                  cursor: pointer;
    
                  img {
                    width: 10px;
                    height: 10px;
                  }
                }
    
                .minus {
                  border: 1px solid #d0d0d0;
                }
    
                .number {
                  display: inline-block;
                  margin: 0 5px;
                }
    
                .add {
                  background-image: linear-gradient(to right, #fedb39, #febb2e);
                }
              }
            }
          }
        }
      }
    
      .sc-operation {
        position: absolute;
        bottom: 0;
        width: 100%;
        font-size: 12px;
        color: #949494;
        display: flex;
    
        .sc-contact {
          display: flex;
          flex-direction: column;
          padding: 10px 10px 10px 15px;
          background-color: #000;
          border-top-left-radius: 30px;
          border-top-right-radius: 5px;
          border-bottom-right-radius: 5px;
          border-bottom-left-radius: 30px;
    
          img {
            width: 20px;
            height: 20px;
            margin: 0 auto 3px;
          }
        }
    
        .sc-deliveryMes {
          margin-left: 3px;
          padding-right: 15px;
          background-color: #000;
          display: flex;
          border-top-left-radius: 5px;
          border-bottom-left-radius: 5px;
          align-items: center;
    
          .deliveryNumber {
            position: relative;
    
            img {
              position: absolute;
              top: -58px;
              left: -18px;
              width: 100px;
              height: 100px;
            }
    
            span {
              display: inline-block;
              width: 20px;
              height: 20px;
              line-height: 20px;
              text-align: center;
              border-radius: 50%;
              background-color: #ff6262;
              color: #fff;
              position: absolute;
              left: 35px;
              top: 0;
            }
          }
    
          .priceMes {
            margin-left: 66px;
    
            .totalPrice {
              color: #fff;
              font-size: 16px;
              margin-bottom: 3px;
    
              span {
                color: #949494;
                margin-left: 3px;
                font-size: 12px;
                text-decoration: line-through;
              }
            }
    
            .deliveryMes {
              span {
                text-decoration: line-through;
                margin: 0 6px 0 3px;
              }
            }
          }
        }
    
        .sc-pay {
          font-size: 14px;
          font-weight: bold;
          color: #000;
          line-height: 59px;
          flex: 1;
          text-align: center;
          background-image: linear-gradient(to right, #fedb39, #febb2e);
          border-top-right-radius: 30px;
          border-bottom-right-radius: 30px;
          cursor: pointer;
        }
      }
    }
    
    </style>

二. 父组件代码如下（shoppingCartPage.vue），原理分析：

父组件比较简单，主要用来调用子组件。

<template>
      <div>
        <shopping-cart></shopping-cart>
      </div>
    </template>
    <script>
    import ShoppingCart from '../components/shoppingCart'
    export default {
      components: {
        ShoppingCart
      },
      data() {
        return {
          
        }
      },
      methods: {
        
      }
    }
    
    </script>
    <style lang="less" scoped>
    </style>

[format_png]: https://imgconvert.csdnimg.cn/aHR0cHM6Ly9tbWJpei5xcGljLmNuL21tYml6X2dpZi82aWFzUHE0aWJCN2xvdWxXd0tNYk5jbnBtN2x6bkZWZUZzdjRicTJFQmRkTUIwaHNScGZYdnp2T1dSRnZPaG94akQ4QWZXSmFpY1dLWFR6bm1KMTBkNm5Rdy82NDA?x-oss-process=image/format,png