老师，我在Home.vue中里边加入vuex的mapState，映射了city属性，但是页面报错了

来源：8-12 Vue项目城市选择页 - 使用keep-alive优化网页性能

Keily

2021-01-01

报错图片描述
代码如下：

<template>
  <div>
    <home-header></home-header><!--:city="city"-->
    <home-swiper :list="swiperList"></home-swiper>
    <home-icons :list="iconList"></home-icons>
    <home-recommend :list="recommendList"></home-recommend>
    <home-weekend :list="weekendList"></home-weekend>
  </div>

</template>

<script>
import HomeHeader from './components/Header.vue'
import HomeSwiper from './components/Swiper.vue'
import HomeIcons from './components/Icons.vue'
import HomeRecommend from './components/Recomment.vue'
import HomeWeekend from './components/Weekend.vue'
import axios from 'axios'
import {
  mapState
} from 'vuex'
export default{
  name: 'Home',
  components: {
    HomeHeader,
    HomeSwiper,
    HomeIcons,
    HomeRecommend,
    HomeWeekend
  },
  computed: {
    ...mapState(['city'])
   
  },
  data () {
    return {
      // city: '',
      swiperList: [],
      iconList: [],
      recommendList: [],
      weekendList: []
    }
  },
  methods: {
    getHomeInfo: function () {
      axios.get('/api/index.json?city=' + this.city)
        .then(this.getHomeInfoSucc)
    },
    getHomeInfoSucc (res) {
      // console.log('res:' + JSON.stringify(res))
      res = res.data
      if (res.ret && res.data) {
        const data = res.data
        this.city = data.city
        this.swiperList = data.swiperList
        this.iconList = data.iconList
        this.recommendList = data.recommendList
        this.weekendList = data.weekendList
      }
    }
  },
  mounted () {
    console.log('mounted')
    this.getHomeInfo()
  },
  activated () {
    console.log('activated')
  }
}
</script>

<style scoped>

</style>

写回答

2回答

Keily

提问者

2021-01-01

我在换了种写法：

computed: {
    ...mapState({
      'cityFromStore': 'city' // 将vuex中的state中city属性映射到 计算属性city中
    }),
    city: {
      get () {
        return this.cityFromStore
      },
      set (newName) {
        return newName
      }
    }
  },