09_03. 使用vuex实现购买数量

作者: Robyn_Luo | 来源:发表于2017-11-23 17:12 被阅读0次

1. 项目分析

2. 关键代码：

1. 导入vuex以及使用
1. 配置
- 然后在单独创建出来的配置文件里面配置

import storage from '../js/storage.js';

export default {

  // 定义状态, 相当于组件的data
  // 区别是这里的数据共享, 那都可以通过$store.state.属性名的方式使用
  state: {
    // 从localStorage中取出购买数据进行共享
    goodsBuyData: storage.get('goodsBuyData')
  },

  // 定义计算属性, 相当于组件的computed
  getters: {
    // 计算购买总数
    getBuyTotal(state) {
      // 先拿到每个商品数量, 然后使用reduce累加起来
      return Object.values(state.goodsBuyData).reduce((sum, v) => sum + v, 0);
    }
  },

  // 定义修改方法, 相当于组件的methods
  mutations: {
    // 修改单个商品的购买数量
    upBuyData(state, params) {
      // 拿到id与新数量, 修改goodsBuyData
      // 然后把修改后的goodsBuyData存储到本地storage
      state.goodsBuyData[params.id] = params.total;
      storage.set('goodsBuyData', state.goodsBuyData);
    }
  }
};

在底部写活

+ 在商品列表里面添加点击事件，使点击加入购物车按钮后底部的同时变化

3. 完整代码块：

src/component/common/footer.vue

<template>
  <footer>
    <nav class="mui-bar mui-bar-tab">
      <router-link class="mui-tab-item" to="/index">
        <span class="mui-icon mui-icon-home"></span>
        <span class="mui-tab-label">首页</span>
      </router-link>
      <router-link class="mui-tab-item" v-bind:to="{ name: 'gl' }">
        <span class="mui-icon mui-icon-extra mui-icon-extra-gift"></span>
        <span class="mui-tab-label">商品购买</span>
      </router-link>
      <router-link class="mui-tab-item" v-bind:to="{ name: 'sc' }">
        <span class="mui-icon mui-icon-extra mui-icon-extra-cart">
          <span class="mui-badge">{{ $store.getters.getBuyTotal }}</span>
        </span>
        <span class="mui-tab-label">购物车</span>
      </router-link>
      <router-link class="mui-tab-item" to="/settings">
        <span class="mui-icon mui-icon-gear"></span>
        <span class="mui-tab-label">设置</span>
      </router-link>
    </nav>
    <i></i>
  </footer>
</template>

<script>
export default {};
</script>

<style scoped>
i {
  display: block;
  height: 50px;
}
</style>

src/component/common/header.vue

<template>
  <header>
    <mt-header fixed title="小买卖">
      <!-- 返回按钮只在非首页出现 -->
      <!-- 通过$route.path那到当前路径比较 -->
      <!-- 通过$router.go(-1)方法实现页面返回功能 -->
      <mt-button v-if="$route.path != '/index'" v-on:click="$router.go(-1)" icon="back" slot="left"></mt-button>
    </mt-header>
    <i></i>
  </header>
</template>

<script>
export default {};
</script>

<style scoped>
header i {
  display: block;
  height: 40px;
}
</style>

src/component/common/index.js

// 编写属于自己的公共Vue组件库
import HeaderComponent from './header.vue';
import FooterComponent from './footer.vue';
import NumboxComponent from './numbox.vue';

// Vue插件要求提供一个install方法, 这个方法会被注入Vue
// 需要我们调用Vue的filter component directive去扩展功能
export default {
  install(Vue) {
    Vue.component('app-header', HeaderComponent);
    Vue.component('app-footer', FooterComponent);
    Vue.component('app-numbox', NumboxComponent);
  }
};

src/component/common/numbox.vue

<template>
  <div class="mui-numbox">
    <button class="mui-btn mui-btn-numbox-minus" @click="sub">-</button>
    <input class="mui-input-numbox" type="number" v-model="val">
    <button class="mui-btn mui-btn-numbox-plus" @click="add">+</button>
  </div>
</template>

<script>
export default {
  props: ["initVal"],

  data() {
    return {
      val: this.initVal || 0 // 优先使用父指定的默认值, 父不指定默认为0
    };
  },

  methods: {
    // 减减, 最小值为0
    sub() {
      this.val > 0 && this.val--;
    },

    // 加加, 最大值不限
    add() {
      this.val++;
    }
  },

  watch: {
    // 值发生变化就通过事件的方式传给父
    val() {
      this.$emit("change", this.val);
    }
  }
};
</script>

<style scoped>

</style>

src/component/goods/son/intro.vue

<template>
  <!-- 使用mui的卡片视图进行布局 -->
  <div class="mui-card">
    <div class="mui-card-header">{{ intro.title }}</div>
    <div class="mui-card-content">
      <div class="mui-card-content-inner" v-html="intro.content"></div>
    </div>
  </div>
</template>

<script>
export default {
  props: ["id"],

  data() {
    return {
      intro: {}
    };
  },

  methods: {
    // 获取图文介绍, 但是需要由父亲告诉我id
    getIntro() {
      this.axios
        .get(this.api.goodsD + this.id)
        .then(rsp => (this.intro = rsp.data.message[0]));
    }
  },

  created() {
    this.getIntro();
  }
};
</script>

<style scoped>

</style>

src/component/goods/goods_detail.vue

<template>
  <article class="goods-detail">
    <!-- 轮播图 -->
    <mt-swipe :auto="10000">
      <!-- 我们这个商品缩略图是没有跳转连接的, 不需要router-link -->
      <mt-swipe-item v-for="item in lunbos" v-bind:key="item.src">
        <img v-bind:src="item.src">
      </mt-swipe-item>
    </mt-swipe>

    <!-- 商品购买 -->
    <div class="mui-card">
      <!-- 名称 -->
      <div class="mui-card-header">{{ goodsPrice.title }}</div>
      <!-- 价格 -->
      <div class="mui-card-content mui-card-content-inner">
        <div class="price">
          <s>市场价:￥{{ goodsPrice.market_price }}</s>
          <span>销售价: </span>
          <em>￥{{ goodsPrice.sell_price }}</em>
        </div>
        <div>
          <span>购买数量：</span>
          <!--数字输入框 -->
          <app-numbox v-bind:initVal="buyCount" @change="getTotal"></app-numbox>
        </div>
      </div>
      <!-- 按钮 -->
      <div class="mui-card-footer">
        <button type="button" class="mui-btn mui-btn-success mui-btn-block mui-btn-outlined">结算</button>
        <div></div>
        <button type="button" @click="addShopcart" class="mui-btn mui-btn-success mui-btn-block mui-btn-outlined">加入购物车</button>
      </div>
    </div>

    <!-- 评论与介绍 -->
    <div class="mui-card">
      <!-- 选项卡, 利用value的值控制选取那个子元素 -->
      <mt-navbar v-model="navbarSelector">
        <mt-tab-item id="commont">商品评论</mt-tab-item>
        <mt-tab-item id="intro">图文介绍</mt-tab-item>
      </mt-navbar>
      <!-- 内容, 利用value的值控制选取那个子元素 -->
      <mt-tab-container v-model="navbarSelector">
        <mt-tab-container-item id="commont">
          <p>内容1</p>
        </mt-tab-container-item>
        <mt-tab-container-item id="intro">
          <app-intro v-bind:id="id"></app-intro>
        </mt-tab-container-item>
      </mt-tab-container>
    </div>

  </article>
</template>

<script>
import IntroComponent from "./son/intro.vue";
import storage from "../../js/storage.js";

export default {
  data() {
    return {
      id: this.$route.params.id,
      lunbos: [],
      goodsPrice: {},
      navbarSelector: "commont",
      buyCount: (storage.get("goodsBuyData") || {})[this.$route.params.id]
    };
  },

  methods: {
    // 获取商品缩略图
    getGoodsThumList() {
      this.axios
        .get(this.api.goodsT + this.id)
        .then(rsp => (this.lunbos = rsp.data.message));
    },

    // 获取商品价格信息
    getGoodsPrice() {
      this.axios
        .get(this.api.goodsP + this.id)
        .then(rsp => (this.goodsPrice = rsp.data.message[0]));
    },

    // 获取最新的购买数量, 并存储起来
    getTotal(total) {
      this.buyCount = total;
    },

    // 加入购物车, 调用vuex中提供的修改方法即可
    addShopcart() {
      this.$store.commit("upBuyData", {
        id: this.id,
        total: this.buyCount
      });
    }
  },

  created() {
    this.getGoodsThumList();
    this.getGoodsPrice();
  },

  components: {
    "app-intro": IntroComponent
  }
};
</script>

<style lang="less">
.goods-detail {
  .mui-card-content {
    .price {
      color: rgb(51, 51, 51);
      margin-bottom: 4px;
      span {
        margin-left: 6px;
      }
      em {
        font-size: 18px;
        color: red;
      }
    }
  }
  .mui-card-footer {
    div {
      width: 100%;
    }
    .mui-btn {
      padding: 8px 0;
      font-size: 16px;
    }
  }
  .mint-tab-item {
    &.is-selected {
      margin-bottom: 0;
      border-bottom: 3px solid #2ce094;
      color: #2ce094;
    }
  }
  .mint-tab-item-label {
    font-size: 18px;
    color: #2ce094;
  }
}
// 给轮播图加个高度
.mint-swipe {
  height: 260px;
  background-color: white;
  img {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: 260px;
  }
}
</style>

src/component/goods/goods_list.vue

<template>
  <article>
    <ul class="mui-table-view mui-grid-view">
      <!-- 商品详情 -->
      <li v-for="item in goodsList" v-bind:key="item.id" class="mui-table-view-cell mui-media mui-col-xs-6">
        <router-link v-bind:to="{ name: 'gd', params: { id: item.id } }">
          <div class="mui-card">
            <!-- 商品图片 -->
            <div class="mui-card-header">
              <img v-bind:src="item.img_url" alt="" />
            </div>
            <!-- 商品描述 -->
            <div class="mui-card-footer ">
              <p class="mui-ellipsis-2">{{ item.title }}</p>
            </div>
            <!-- 商品价格 -->
            <div class="mui-card-content">
              <p class="price">
                <span>￥{{ item.sell_price }}</span>
                <s>￥{{ item.market_price }}</s>
              </p>
              <p class="tip">
                <span>热卖中</span>
                <span>剩余{{ item.stock_quantity }}件</span>
              </p>
            </div>
          </div>
        </router-link>
      </li>
    </ul>
    <!-- 加载更多 -->
    <button v-on:click="loadMore()" v-bind:disabled="lastPage" class="mui-btn mui-btn-success mui-btn-block mui-btn-outlined">
      {{ lastPage? '已经是最后一页了': '加载更多' }}
    </button>
  </article>
</template>

<script>
export default {
  data() {
    return {
      goodsList: [],
      pageIndex: 1,
      lastPage: false // 是否最后一页
    };
  },

  methods: {
    // 获取商品列表, 需要一个pageindex查询字符串, 用来指定页码
    getGoodsList() {
      this.axios
        .get(`${this.api.goodsL}?pageindex=${this.pageIndex}`)
        .then(rsp => {
          this.goodsList.push(...rsp.data.message);
          this.isLastPath(rsp.data.message);
        });
    },

    // 加载下一页数据
    loadMore() {
      this.pageIndex++;
      this.getGoodsList();
    },

    // 判断是不是最后一页数据, 是的话把lastPage设为ture
    isLastPath(goodsList) {
      if (goodsList.length == 0) {
        this.lastPage = true;
      }
    }
  },

  created() {
    this.getGoodsList();
  }
};
</script>

<style lang="less" scoped>
.mui-card {
  box-shadow: 0px 0px 4px rgba(0, 0, 0, 0.3);
}
.mui-card-header {
  padding: 8px;
  /*height: 100px;*/
  img {
    width: 100%;
    height: 100%;
  }
}
.mui-card-content {
  text-align: center;
  .price {
    margin-bottom: 4px;
    color: #000;
    span {
      color: red;
    }
  }
  .tip {
    overflow: hidden;
    padding: 0 8px;
    font-size: 12px;
    span:first-child {
      float: left;
    }
    span:last-child {
      float: right;
    }
  }
}
</style>

src/component/home/home.vue

<template>
  <article>
    <!-- 轮播图 -->
    <mt-swipe :auto="10000">
      <mt-swipe-item v-for="item in lunbos" v-bind:key="item.url">
        <router-link v-bind:to="item.url">
          <img v-bind:src="item.img">
        </router-link>
      </mt-swipe-item>
    </mt-swipe>
    <!-- 六宫格 -->
    <ul class="mui-table-view mui-grid-view mui-grid-9">
      <li class="mui-table-view-cell mui-media mui-col-xs-4 mui-col-sm-3">
        <router-link to="/">
          <span class="mui-icon mui-icon-home"></span>
          <div class="mui-media-body">首页</div>
        </router-link>
      </li>
      <li class="mui-table-view-cell mui-media mui-col-xs-4 mui-col-sm-3">
        <router-link to="/news/list">
          <span class="mui-icon mui-icon-chat"></span>
          <div class="mui-media-body">热点新闻</div>
        </router-link>
      </li>
      <li class="mui-table-view-cell mui-media mui-col-xs-4 mui-col-sm-3">
        <router-link to="/photo/list/0">
          <span class="mui-icon mui-icon-image"></span>
          <div class="mui-media-body">图片分享</div>
        </router-link>
      </li>
      <li class="mui-table-view-cell mui-media mui-col-xs-4 mui-col-sm-3">
        <router-link to="/">
          <span class="mui-icon mui-icon-search"></span>
          <div class="mui-media-body">搜索</div>
        </router-link>
      </li>
      <li class="mui-table-view-cell mui-media mui-col-xs-4 mui-col-sm-3">
        <router-link to="/">
          <span class="mui-icon mui-icon-phone"></span>
          <div class="mui-media-body">联系我们</div>
        </router-link>
      </li>
      <li class="mui-table-view-cell mui-media mui-col-xs-4 mui-col-sm-3">
        <router-link to="/">
          <span class="mui-icon mui-icon-info"></span>
          <div class="mui-media-body">关于我们</div>
        </router-link>
      </li>
    </ul>
  </article>
</template>

<script>
export default {
  data() {
    return {
      lunbos: []
    };
  },

  methods: {
    // 请求数据, 成功后把数据存储到lunbos中
    getLunbo() {
      this.axios
        .get(this.api.getLunbo)
        .then(rep => (this.lunbos = rep.data.message));
    }
  },

  // 组件初始化完毕后, 自动调用接口获取数据渲染轮播图
  created() {
    this.getLunbo();
  }
};
</script>

<style lang="less" scoped>
@height: 260px;
article {
  height: @height;
  img {
    height: @height;
  }
}
</style>

src/component/news/news_detail.vue

<template>
  <article>
    <!-- 使用mui的卡片视图布局, 注意: 卡片视图都是flex, 这里把他改成block -->
    <div class="mui-card">
      <div class="mui-card-header">
        <h4>{{ newsDetail.title }}</h4>
        <p class="mui-ellipsis">
          <span>创建时间: {{ newsDetail.add_time | date }}</span>
          <span>点击数: {{ newsDetail.click }}</span>
        </p>
      </div>
      <!-- content内容中含有html标签, 要让它正常展示, 必须使用v-html -->
      <div class="mui-card-footer" v-html="newsDetail.content"></div>
    </div>
  </article>
</template>

<script>
export default {
  data() {
    return {
      newsDetail: {}
    };
  },

  methods: {
    // 获取新闻详情, 注意这里接口返回的是一个数组, 我们需要通过下标那新闻详情对象
    getNewsDetail() {
      this.axios
        .get(this.api.getND + this.$route.params.id)
        .then(rsp => (this.newsDetail = rsp.data.message[0]));
    }
  },

  created() {
    this.getNewsDetail();
  }
};
</script>

<style scoped>
article {
  overflow: hidden;
}
.mui-card-header,
.mui-card-footer {
  display: block;
}
</style>

src/component/news/news_list.vue

<template>
  <article>
    <ul class="mui-table-view">
      <li class="mui-table-view-cell mui-media" v-for="item in newsList" v-bind:key="item.id">
        <router-link v-bind="{ to: `/news/detail/${item.id}` }">
          <img class="mui-media-object mui-pull-left" v-bind:src="item.img_url">
          <div class="mui-media-body">
            <h4 class="mui-ellipsis">{{ item.title }}</h4>
            <p class="mui-ellipsis">
              <span>创建时间: {{ item.add_time | date }}</span>
              <span>点击数: {{ item.click }}</span>
            </p>
          </div>
        </router-link>
      </li>
    </ul>
  </article>
</template>

<script>
export default {
  data() {
    return {
      newsList: []
    };
  },

  methods: {
    // 获取新闻列表数据
    getNewsList() {
      this.axios
        .get(this.api.getNL)
        .then(rsp => (this.newsList = rsp.data.message));
    }
  },

  // 上来就调用接口初始化数据
  created() {
    this.getNewsList();
  }
};
</script>

<style scoped>

</style>

src/component/photo/photo_detail.vue

<template>
  <article>
    <!-- 使用mui的卡片视图布局, 注意: 卡片视图都是flex, 这里把他改成block -->
    <div class="mui-card">
      <div class="mui-card-header">
        <h4>{{ photoDetail.title }}</h4>
        <p class="mui-ellipsis">
          <span>创建时间: {{ photoDetail.add_time | date }}</span>
          <span>点击数: {{ photoDetail.click }}</span>
        </p>
      </div>
      <!-- 使用mui的图文表格布局 -->
      <ul class="mui-table-view mui-grid-view">
        <li class="mui-table-view-cell mui-media mui-col-xs-4" v-for="item in photoThumList" v-bind:key="item.src">
          <img class="mui-media-object" v-bind:src="item.src" v-preview="item.src">
        </li>
      </ul>
      <!-- content内容中含有html标签, 要让它正常展示, 必须使用v-html -->
      <div class="mui-card-footer">{{ photoDetail.content }}</div>
    </div>
  </article>
</template>

<script>
export default {
  data() {
    return {
      id: this.$route.params.id,
      photoDetail: {},
      photoThumList: []
    };
  },

  methods: {
    // 获取图片详情
    getPhotoDetail() {
      this.axios
        .get(this.api.photoD + this.id)
        .then(rsp => (this.photoDetail = rsp.data.message[0]));
    },

    // 获取图片缩略图
    getphotoThumList() {
      this.axios
        .get(this.api.photoT + this.id)
        .then(rsp => (this.photoThumList = rsp.data.message));
    }
  },

  created() {
    this.getPhotoDetail();
    this.getphotoThumList();
  }
};
</script>

<style scoped>
.mui-card-header,
.mui-card-footer {
  display: block;
}
.mui-card h4 {
  font-size: 14px;
}
</style>

src/component/photo/photo_list.vue

<template>
  <article>
    <!-- 使用mui的列表布局 -->
    <ul class="mui-table-view">
      <li class="mui-table-view-cell">
        <router-link v-bind:to="{ name: 'pl', params: { id: 0 } }">全部</router-link>
      </li>
      <li v-for="item in photoCategoryList" v-bind:key="item.id" class="mui-table-view-cell">
        <router-link v-bind:to="{ name: 'pl', params: { id: item.id } }">{{ item.title }}</router-link>
      </li>
    </ul>

    <!-- 使用mui的卡片视图布局 -->
    <div class="mui-card" v-for="item in photoList" v-bind:key="item.id">
      <router-link v-bind:to="{ name: 'pd', params: { id: item.id } }">
        <div class="mui-card-header mui-card-media" v-bind="{ style: `height:40vw;background-image:url(${item.img_url})` }"></div>
        <div class="mui-card-content">
          <div class="mui-card-content-inner">
            <p>{{ item.title }}</p>
            <p style="color: #333;">{{ item.zhaiyao }}</p>
          </div>
        </div>
      </router-link>
    </div>
  </article>
</template>

<script>
export default {
  data() {
    return {
      photoCategoryList: [],
      photoList: []
    };
  },

  methods: {
    // 获取图片分类列表
    getPhotoCategoryList() {
      this.axios
        .get(this.api.photoC)
        .then(rsp => (this.photoCategoryList = rsp.data.message));
    },

    // 获取图片列表, 需要使用分类ID来获取指定的图片列表
    getPhotoList() {
      this.axios
        .get(this.api.photoL + this.$route.params.id)
        .then(rsp => (this.photoList = rsp.data.message));
    }
  },

  // 在组件初始化完毕后执行一次
  created() {
    this.getPhotoCategoryList();
    this.getPhotoList();
  },

  watch: {
    // 监听url的变化, 变化后拿到新的id,
    // 调用接口发送请求修改photoList数据
    $route() {
      this.getPhotoList();
    }
  }
};
</script>

<style lang="less" scoped>
.mui-table-view {
  overflow: hidden;
  li {
    float: left;
    color: deepskyblue;
  }
}

.mui-card-header,
.mui-card-header {
  display: block;
}
</style>

src/component/shopcart/shopcart.vue

<template>
  <article class="shopcart-list">

    <!-- 商品列表 -->
    <div class="goods" v-for="item in buyGoodsList" v-bind:key="item.id">
      <mt-switch class="switch" v-model="item.isSelected"></mt-switch>
      <img class="img" v-bind:src="item.thumb_path">
      <div class="inforight">
        <h4 class="mui-ellipsis-2">{{ item.title }}</h4>
        <div class="bottom">
          <ul>
            <li>￥{{ item.sell_price }}</li>
            <li>
              <!-- 公共的数字输入框, 修改商品数量需要拿到id与子传给父的值, 所以这里需要使用()传参, $event就代表子传父的数据 -->
              <app-numbox v-bind:initVal="goodsBuyData[item.id]" @change="modifyBuyData(item.id, $event)"></app-numbox>
            </li>
            <li>
              <a href="javascript:void(0)" @click="delGoods(item.id)">删除</a>
            </li>
          </ul>
        </div>
      </div>
    </div>

    <!-- 总价 -->
    <div class="total">
      <div class="total_val">
        <ul>
          <li>总计（不含运费）</li>
          <li>已勾选商品{{ buyTotal }}件,总价:￥品{{ buyPriceTotal }}元</li>
        </ul>
      </div>
      <div class="total_btn">
        <mt-button type="primary" @click="$store.commit('setBuyTotal', 888)">付 款{{ $store.state.buyTotal }}</mt-button>
      </div>
    </div>

  </article>
</template>

<script>
import storage from "../../js/storage.js";

export default {
  data() {
    return {
      goodsBuyData: storage.get("goodsBuyData"),
      buyGoodsList: []
    };
  },

  methods: {
    // 获取购物车列表数据
    getBuyGoodsList() {
      let ids = Object.keys(storage.get("goodsBuyData")).join(",");
      this.axios.get(this.api.shopcL + ids).then(rsp => {
        // 给每个商品补充一个isSelected属性, 默认值为true
        rsp.data.message.forEach(goods => (goods.isSelected = true));
        this.buyGoodsList = rsp.data.message;
      });
    },

    // 修改购买数据
    modifyBuyData(id, val) {
      this.goodsBuyData[id] = val;
      console.log(this.goodsBuyData);
    },

    // 删除商品
    delGoods(id) {
      this.$delete(this.goodsBuyData, id);
      this.buyGoodsList = this.buyGoodsList.filter(v => v.id != id);
    }
  },

  created() {
    this.getBuyGoodsList();
  },

  computed: {
    // 总数
    buyTotal() {
      return this.buyGoodsList.reduce((sum, goods) => {
        // reduce方法每次把上一次的sum结果传递进来, 供我们继续累加,
        // 如果商品为选中状态我们就累加, 否则原物传递到下一次计算
        return goods.isSelected ? sum + this.goodsBuyData[goods.id] : sum;
      }, 0);
    },

    // 总价
    buyPriceTotal() {
      return this.buyGoodsList.reduce((sum, goods) => {
        // reduce方法每次把上一次的sum结果传递进来, 供我们继续累加,
        // 如果商品为选中状态我们就累加, 否则原物传递到下一次计算
        return goods.isSelected
          ? sum + this.goodsBuyData[goods.id] * goods.sell_price
          : sum;
      }, 0);
    }
  },

  watch: {
    // 监听商品数量的变化, 实时存储的本地storage
    goodsBuyData: {
      handler() {
        storage.set("goodsBuyData", this.goodsBuyData);
      },
      // 深度监听对象的变化, 这样vue每次会比较子属性的值
      deep: true
    }
  }
};
</script>

<style lang="less">
.shopcart-list {
  .goods {
    border-bottom: 1px solid rgba(0, 0, 0, 0.3);
    height: 102px;
    display: flex;
    padding: 5px;
    .switch {
      flex: 0 0 52px;
    }
    .img {
      margin-left: 5px;
      height: 75px;
      width: 75px;
      flex: 0 0 85px;
    }
    .inforight {
      margin-left: 5px;
      flex: 1;
    }
    .inforight ul {
      padding-left: 0px;
    }
    .inforight li {
      list-style: none;
      display: inline-block;
    }
    .inforight h4 {
      color: #0094ff;
      font-size: 14px;
    }
    .bottom li:first-child {
      color: red;
      margin-right: 5px;
    }
    .bottom li:last-child {
      margin-left: 5px;
    }
  }
  .total {
    height: 84px;
    background-color: rgba(0, 0, 0, 0.1);
    display: flex;
    padding: 5px 14px;
    ul {
      padding-left: 0px;
      margin: 14px 0;
      li {
        list-style: none;
        font-size: 14px;
      }
    }
    &_val {
      flex: 1;
    }
    &_btn {
      flex: 0 0 60px;
      margin: 18px 0 0 0;
    }
  }
}
</style>

src/component/App.vue

<template>
  <main>
    <lg-preview></lg-preview>
    <app-header></app-header>
    <router-view></router-view>
    <app-footer></app-footer>
  </main>
</template>

<script>
export default {};
</script>

<style scoped>

</style>

src/component/filter/date.js

export default function(time) {
    let date = new Date(time);
    return `${date.getFullYear()}-${date.getMonth() + 1}-${date.getDate()}`;
};

src/component/filter/index.js

import DateFilter from './date.js';

export default {
    install(Vue) {
        Vue.filter('date', DateFilter);
    }
};

src/component/js/api_config.js

const domain = 'http://vue.studyit.io/api';

export default {

  // 获取轮播图的接口
  getLunbo: `${domain}/getlunbo`,

  // 新闻相关接口
  getNL: `${domain}/getnewslist`,
  getND: `${domain}/getnew/`,             // 该接口后面需要一个id

  // 图片相关接口
  photoC: `${domain}/getimgcategory/`,
  photoL: `${domain}/getimages/`,      // 该接口后面需要一个分类id: /getimages/:id
  photoD: `${domain}/getimageinfo/`,   // 该接口后面需要一个图片id: /getimageinfo/:id
  photoT: `${domain}/getthumimages/`,  // 该接口后面需要一个图片id: /getthumimages/:id

  // 商品相关接口
  goodsL: `${domain}/getgoods/`,          // 该接口后面需要一个页码: /getgoods/?pageindex=number
  goodsD: `${domain}/goods/getdesc/`,     // 该接口后面需要一个商品id: /getdesc/:id
  goodsT: `${domain}/getthumimages/`,     // 该接口后面需要一个商品id: /getthumimages/:id
  goodsP: `${domain}/goods/getinfo/`,           // 该接口后面需要一个商品id: /getinfo/:id

  // 购物车相关接口
  shopcL: `${domain}/goods/getshopcarlist/`,  // 该接口后面需要一串id: /getshopcarlist/:ids

  // 评论相关接口
  commentL: `${domain}/getcomments/`,     // 该接口后面需要一个id: /getcomments/:id
  commentS: `${domain}/postcomment/`,     // 该接口后面需要一个id: /postcomment/:id, 该需要content内容
};

src/component/js/main.js

// from后面的路径, 如果含有./ ../那么就相对于当前文件找文件
// 如果没有, 那么就会去node_modules里面找对应的包
// 1.1 导入第三方包
import Vue from 'vue';
import MintUi from 'mint-ui';
import 'mint-ui/lib/style.css';
import Common from '../component/common';  // 自动找到index.js引入
import 'mui/dist/css/mui.css';
import 'mui/examples/hello-mui/css/icons-extra.css';
import axios from 'axios';
import VueRouter from 'vue-router';
import Filter from '../filter'             // 自动找到index.js引入
import '../less/index.less';
import VuePP from 'vue-picture-preview';
import Vuex from 'vuex';

// 1.2 启用vue插件
Vue.use(MintUi);
Vue.use(Common);
Vue.use(VueRouter);
Vue.use(Filter);
Vue.use(VuePP);
Vue.use(Vuex);

// 2.1 导入配置
import routerConfig from '../router'    // 自动找到index.js引入
import apiConfig from './api_config.js'

// 2.2 扩展实例成员
Vue.prototype.axios = axios;   // 把axios库放置到原型, 将来其他组件直接可以拿到axios对象
Vue.prototype.api = apiConfig;

// 2.3 导入根组件
import AppComponent from '../component/App.vue';

// 2.4 渲染根组件, 启动项目
new Vue({
  el: '#app',
  render(createNode) {
    return createNode(AppComponent);
  },
  router: new VueRouter(routerConfig),
  store: new Vuex.Store({

    // 这个配置项就相当于咱们的data选项
    state: {
      buyTotal: 100
    },

    // 这个配置想就相当于咱们的methods选项, 用于定义一些方法, 
    // 但是这里的方法作用很明确就是为了修改状态值
    mutations: {

      // 这个方法的第一个参数为vuex自动传入, 即state状态
      // 这个方法的第二个参数为用户传入
      // 注意: 千万不要通过$store.state.buyTotal = newTotal这样方式修改值
      // 因为这样vuex无法捕获到数据的变化, 同时这个数据是共享的, 可能在任意地方被修改不利于维护
      // 如果调用这里方法修改数据, 不会混乱, 因为修改规则我都提取设计好了
      setBuyTotal(state, newTotal) {
        state.buyTotal = newTotal;
      }

    }
  })
});

src/component/less/index.less

export default {

  // localStorage.setItem的封装
  set(key, val) {
    localStorage.setItem(key, JSON.stringify(val));
  },

  // localStorage.getItem的封装
  get(key) {
    let val = localStorage.getItem(key);
    // 先尝试着解析数据, 成功了就返回解析后的值, 不成功就原物返回
    try {
      val = JSON.parse(val);
    } finally {
      return val;
    }
  },

  // 清除所有本地存储的数据
  clear() {
    localStorage.clear();
  }

};

src/component/less/index.less

.mui-card-footer img {
    width: 100%;
}

.mui-card img {
    width: 100%;
    height: auto;
}

src/component/router/index.js

// 这里对外导出一个路由配置对象
import HomeComponent from '../component/home/home.vue';
import NewsListComponent from '../component/news/news_list.vue';
import NewsDetailComponent from '../component/news/news_detail.vue';
import PhotoListComponent from '../component/photo/photo_list.vue';
import PhotoDetailComponent from '../component/photo/photo_detail.vue';
import GoodsListComponent from '../component/goods/goods_list.vue';
import GoodsDetailComponent from '../component/goods/goods_detail.vue';
import ShopcartComponent from '../component/shopcart/shopcart.vue';

export default {
  linkActiveClass: 'mui-active',
  routes: [
    // 首页路由配置
    { path: "/", redirect: "/index" },
    { name: "i", path: "/index", component: HomeComponent },

    // 新闻路由配置
    { name: "nl", path: "/news/list", component: NewsListComponent },
    { name: "nd", path: "/news/detail/:id", component: NewsDetailComponent },

    // 图片分享相关路由
    { name: "pl", path: '/photo/list/:id', component: PhotoListComponent },
    { name: "pd", path: '/photo/details/:id', component: PhotoDetailComponent },

    // 商品相关路由
    { name: "gl", path: '/goods/list/', component: GoodsListComponent },
    { name: "gd", path: '/goods/detail/:id', component: GoodsDetailComponent },

    // 购物车相关路由
    { name: "sc", path: '/shopcart', component: ShopcartComponent },
  ]
};

src/component/vuex/index.js

import storage from '../js/storage.js';

export default {

  // 定义状态, 相当于组件的data
  // 区别是这里的数据共享, 那都可以通过$store.state.属性名的方式使用
  state: {
    // 从localStorage中取出购买数据进行共享
    goodsBuyData: storage.get('goodsBuyData')
  },

  // 定义计算属性, 相当于组件的computed
  getters: {
    // 计算购买总数
    getBuyTotal(state) {
      // 先拿到每个商品数量, 然后使用reduce累加起来
      return Object.values(state.goodsBuyData).reduce((sum, v) => sum + v, 0);
    }
  },

  // 定义修改方法, 相当于组件的methods
  mutations: {
    // 修改单个商品的购买数量
    upBuyData(state, params) {
      // 拿到id与新数量, 修改goodsBuyData
      // 然后把修改后的goodsBuyData存储到本地storage
      state.goodsBuyData[params.id] = params.total;
      storage.set('goodsBuyData', state.goodsBuyData);
    }
  }
};

src/index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <div id="app"></div>
</body>
</html>

.babelrc

{
    "presets": [ "env" ],
    "plugins":["transform-runtime"]
}

gitignore

# 忽略第三方包, 他们已经记录在package.json文件中了
/node_modules

# 忽略打包后的文件, 因为我们的项目核心是源代码
/dist

# 忽略隐藏文件
.* 

# 不忽略git配置文件和babel配置文件
!.gitignore
!.babelrc

webpack.config.js

const path = require('path');
const HtmlWP = require('html-webpack-plugin');
const CleanWP = require('clean-webpack-plugin');

module.exports = {
  // 打包的入口文件
  entry: path.resolve(__dirname, './src/js/main.js'),
  // 输出
  output: {
    path: path.resolve(__dirname, './dist'),
    filename: 'bundle.js'
  },
  // 插件配置
  plugins: [
    new HtmlWP({
      template: './src/index.html',
      filename: 'index.html',
      inject: 'body'
    }),
    new CleanWP(['dist'])
  ],
  // 模块配置
  module: {

    // 配置loader规则
    rules: [

      // css
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader']
      },

      // less
      {
        test: /\.less$/,
        use: ['style-loader', 'css-loader', 'less-loader']
      },

      // html
      {
        test: /\.(html|tpl)$/,
        use: ['html-loader']
      },

      // 静态资源引用
      {
        test: /\.(png|jpeg|gif|jpg|svg|mp3|ttf)$/,
        use: [
          { loader: 'url-loader', options: { limit: 10240 } } // 小于10KB的打包
        ]
      },

      // js
      {
        test: /\.js$/,
        use: ['babel-loader'],
        exclude: path.resolve(__dirname, '../node_modules')
      },

      // vue
      {
        test: /\.vue$/,
        use: ['vue-loader']
      }

    ]
  }
};

4. 执行webpack-dev-server:

webpack-dev-server

09_03. 使用vuex实现购买数量

1. 项目分析

2. 关键代码：

3. 完整代码块：

4. 执行webpack-dev-server:

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