62、购物车

购物车具备两个功能:

1、 保存用户需要的数据;
2、 清空;

所以,我们使用vuex来实现购物车

1. 添加购物车 路由

向文件 src/router/index.js 中增加内容:

import Cart from '@/components/Cart' 

Vue.use(Router) 

export default new Router({ 
  routes: [ 
    { path: '/cart', 
      name: 'Cart', 
      component: Cart 
    }, 
  ] 
}) 

2. 添加查看购物车的vue页面

新增src/components/Car.vue 文件,内容如下:

<template> 
  <div class="background"> 
    <div id="my_cart"> 
      <CartHeaderView></CartHeaderView> 
      <CartMainView></CartMainView> 
      <NavBottomView :is_cart="is_cart"></NavBottomView> 
    </div> 
  </div> 
</template> 

<script> 

 import CartHeaderView from './CartHeader.vue'; 
 import CartMainView from './CartMain.vue'; 
 import NavBottomView from './NavBottom.vue'; 

 export default{ 
   data () { 
     return { 
       is_cart: true 
     } 
   }, 
   mounted(){ 
   }, 
   components:{ 
     CartHeaderView, 
     CartMainView, 
     NavBottomView 
   } 
 } 
</script> 

3. 增加对应的组件

3、 1新增购物车的头部文件src/components/CartHeader.vue:;

<template> 
    <div id="carttp"> 
        <header class="top_bar"> 
        <a onclick="window.history.go(-1)" class="icon_back"></a> 
        <h3 class="cartname">购物车</h3> 
    </header> 
    </div> 
</template> 

3、 2新增购物车的主体内容src/components/CartMain.vue:;

<template> 
    <main class="cart_box"> 
    <p v-show="!products.length"><i>请选择商品加入到购物车</i></p> 
        <div class="cart_content clearfix" v-for="item in products" style="position: relative;"> 
            <div class="cart_shop clearfix"> 
                <div class="cart_check_box"> 
                    <div class="check_box" checked> 
                    </div> 
                </div> 
                <div class="shop_info clearfix"> 
                    <span class="shop_name" style="font-size: 14px;">丝路乐购新疆商城</span> 
                </div> 
            </div> 

            <div @click="find_item_id(item)" class="cart_del clearfix" style="display: inline-block; position: absolute; top: 10px; right: 10px;"> 
              <div class="del_top"> 
              </div> 
              <div class="del_bottom"> 
              </div> 
            </div> 
            <div class="cart_item"> 
                <div class="cart_item_box"> 
                    <div class="check_box"> 
                    </div> 
                </div> 
                <div class="cart_detial_box clearfix"> 
                    <a class="cart_product_link"> 
                        <img :src="item.image" alt=""> 
                    </a> 
                    <div class="item_names"> 
                        <a> 
                            <span>{{item.title}}</span> 
                        </a> 
                    </div> 
                    <div class="cart_weight"> 
                        <span class="my_color" style="color: #979292;">{{item.title}}</span> 
                    </div> 
                    <div class="cart_product_sell"> 
                        <span class="product_money">¥<strong class="real_money">{{item.price}}</strong></span> 
                        <div class="cart_add clearfix"> 
                            <span @click="minus(item.id)" class="my_jian">-</span> 
                            <input type="tel" class="my_count" :value="item.quantity"> 
                            <span @click="add(item.id)" class="my_add">+</span> 
                        </div> 
                    </div> 
                </div> 
            </div> 
        </div> 

        <div class="pop" style="display: none"> 
          <div class="pop_box"> 
            <div class="del_info"> 
              确定要删除该商品吗? 
            </div> 
            <div class="del_cancel"> 
              取消 
            </div> 
            <div @click="deleteItem" class="del_ok"> 
              确定 
            </div> 
          </div> 
        </div> 

        <div class="cart_fo"> 
          <footer class="cart_footer"> 
            <div class="count_money_box"> 
              <div class="heji"> 
                <strong>合计:</strong> 
                <strong style="color: #ff621a; font-size: 18px;">\{\{ total | currency }}</strong> 
              </div> 
              <a :disabled="!products.length" @click="checkout(products)" class="go_pay"> 
                <span style="color: #f5f5f5; font-weight: 600;">结算</span> 
              </a> 
            </div> 
          </footer> 
        </div> 
    </main> 
</template> 
<script> 
 import { mapGetters } from 'vuex' 
 import { go } from '../libs/router' 
 import {check,animatDelBox} from '../assets/js/cart.js' 

    export default{ 
      data(){ 
        return{ 
          need_delete_item: {}, 
          cartDatas:[ ], 
        } 
      }, 
    mounted(){ 
      check(); 
      animatDelBox(); 
    }, 
    computed: { 
      ...mapGetters({ 
        products: 'cartProducts', 
        checkoutStatus: 'checkoutStatus' 
      }), 
      total () { 
        return this.products.reduce((total, item) => { 
          return total + item.price * item.quantity 
        }, 0) 
      } 
    }, 
    methods: { 

      // 跳转到支付页面 
      checkout (products) { 
        go("/shops/dingdanzhifu", this.$router) 
      }, 

      // 对于商品的数量进行增加 
      add (id) { 
        this.$store.dispatch('changeItemNumber', {id, type: 'add'}) 
      }, 

      // 对于商品的数量进行减少 
      minus (id) { 
        this.$store.dispatch('changeItemNumber', {id, type: 'minus'}) 
      }, 

      // 删除某个商品 
      deleteItem () { 
        this.$store.dispatch('deleteItem', this.need_delete_item.id) 
      }, 
      find_item_id (item) { 
        this.need_delete_item = item 
      } 
    }, 
    } 
</script> 

3、 3修改Vuex的函数;

把下面代码添加到 src/vuex/actions.js 文件中:

export const deleteItem = ({ commit }, id) => { 
  commit(types.DELETE_ITEM, { 
    id: parseInt(id) 
  }) 
} 

export const changeItemNumber = ({ commit }, {id, type}) => { 
  console.info(id) 
  commit(types.CHANGE_ONE_QUANTITY, { 
    id: parseInt(id), 
    type 
  }) 
} 

上面的代码, 实现了购物车的若干功能:

  • 对于商品数量的增减
  • 实现了当商品数量改变时,商品总价也跟着修改。

看效果

购物车做好后,点击打开,如下图所示:

 

总结

  • 购物车的数据, 是通过Vuex来保存的
  • 购物车中数量的加减,是需要直接影响到商品总价的。 这个角度来看,用Vuex来做更加适合。

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