vue 一个简单的项目 之三 详情页面 step6 动态获取详情页面数据 与 跳转页面滚动条设置

上篇，实现了递归组件。本篇，实现详情页面的数据动态获取。

先新建一个分支 detail-ajax，pull 下来，在新分支上写代码。

其实，动态获取数据，之前就做过。使用axios, 就可以了。

父组件 Detail.vue 代码如下。

<template>
  <div>
    <detail-banner
      :sightName="sightName"
      :bannerImg="bannerImg"
      :bannerImgs="gallaryImgs"
    ></detail-banner>
    <detail-header></detail-header>
    <div class="content">
      <detail-list :list="list"></detail-list>
    </div>
  </div>
</template>

<script>
import DetailHeader from './components/Header'
import DetailBanner from './components/Banner'
import DetailList from './components/List'
import axios from 'axios'
export default {
  name: 'Detail',
  components: {
    DetailBanner,
    DetailHeader,
    DetailList
  },
  data () {
    return {
      sightName: '',
      bannerImg: '',
      gallaryImgs: [],
      categoryList: [],
      list: []
    }
  },
  methods: {
    getDetailInfo () {
      // axios.get('/api/detail.json?id=' + this.$route.params.id)
      axios.get('/api/detail.json', {
        params: {
          id: this.$route.params.id
        }
      }).then(this.handleGetDataSucc)
    },
    handleGetDataSucc (res) {
      res = res.data
      if (res.ret && res.data) {
        const data = res.data
        console.log(data)
        this.sightName = data.sightName
        this.bannerImg = data.bannerImg
        this.gallaryImgs = data.gallaryImgs
        this.categoryList = data.categoryList
        this.list = data.categoryList
      }
    }
  },
  mounted () {
    this.getDetailInfo()
  }
}
</script>

<style lang="stylus" scoped>
  .content
    height: 50rem
</style>

Banner.vue 代码如下。

<template>
  <div>
    <detail-banner
      :sightName="sightName"
      :bannerImg="bannerImg"
      :bannerImgs="gallaryImgs"
    ></detail-banner>
    <detail-header></detail-header>
    <div class="content">
      <detail-list :list="list"></detail-list>
    </div>
  </div>
</template>

<script>
import DetailHeader from './components/Header'
import DetailBanner from './components/Banner'
import DetailList from './components/List'
import axios from 'axios'
export default {
  name: 'Detail',
  components: {
    DetailBanner,
    DetailHeader,
    DetailList
  },
  data () {
    return {
      sightName: '',
      bannerImg: '',
      gallaryImgs: [],
      categoryList: [],
      list: []
    }
  },
  methods: {
    getDetailInfo () {
      // axios.get('/api/detail.json?id=' + this.$route.params.id)
      axios.get('/api/detail.json', {
        params: {
          id: this.$route.params.id
        }
      }).then(this.handleGetDataSucc)
    },
    handleGetDataSucc (res) {
      res = res.data
      if (res.ret && res.data) {
        const data = res.data
        console.log(data)
        this.sightName = data.sightName
        this.bannerImg = data.bannerImg
        this.gallaryImgs = data.gallaryImgs
        this.categoryList = data.categoryList
        this.list = data.categoryList
      }
    }
  },
  mounted () {
    this.getDetailInfo()
  }
}
</script>

<style lang="stylus" scoped>
  .content
    height: 50rem
</style>

有一点，就是 在App.vue 中每个路由都加了 keep-alive 标签。如果我们不想要详情页面加上这个标签，一种方法，是之前使用activated 钩子函数，还有一种方法，如下。App.vue 代码。

<template>
  <div id="app">
    <keep-alive exclude="Detail">
      <router-view/>
    </keep-alive>
  </div>
</template>

最后，还有一个问题，当一个页面，滚动到中部，跳转到另一个页面，滚动条的距离会保持过去。这个也很好解决。查看vue-router 文件的滚动行为。

然后将router目录下的 index.js 添加一段代码，即可。如下。

import Vue from 'vue'
import Router from 'vue-router'
import Home from '@/pages/home/Home.vue'
import City from '@/pages/city/City.vue'
import Detail from '@/pages/detail/Detail.vue'
Vue.use(Router)

export default new Router({
  routes: [
    {
      path: '/',
      name: 'Home',
      component: Home
    }, {
      path: '/city',
      name: 'City',
      component: City
    }, {
      path: '/detail/:id',
      name: 'Detail',
      component: Detail
    }
  ],
  scrollBehavior (to, from, savedPosition) {
    return { x: 0, y: 0 }
  }
})

Done!

可以提交合并了！