vue实现城市列表选择功能

成果展示

最后的成果就是下面所展示的内容，因为gif图没有做，只能截图所展示，接下来，会带着大家一步一步的完成下面功能，脚手架搭建和node安装在本次案例不会讲解，如果了解，可以在我的博客园找到有详细介绍

准备工作：

　引入axios插件，调用better-scroll第三方插件，本地json文件，可以参考目录中的city.json,有条件的也可以自己去扒

功能分析

1.获取json数据展示城市列表 。

2.侧边字母定位滚动到相应的位置。

3.实现搜索城市

接下来我们开始对组件进行划分：本次案例中，总共划分为五个组件，下面就是组件的划分图

创建city组件，通过父组件获取数据，传递给子组件

<template>
 <div class=\"city\">
  <CityHeader></CityHeader> //头部
  <Search :list=\"cities\"></Search> //搜索
  <List :hot=\"hotCity\" :letter=\"letter\" :list=\"cities\"></List> //城市列表
  <Alphabet @chang=\"handleLetterChang\" :list=\"cities\"></Alphabet> //A-Z
 </div>
</template>
<script>
import axios from \'axios\'
import CityHeader from \'./components/Header\'
import Search from \'./components/Search\'
import List from \'./components/List\'
import Alphabet from \'./components/Alphabet\'
export default {
 data () {
  return {
   cities:{}, // 城市列表
   hotCity:[], //热门城市
   letter: \'\' // A-Z
  }
 },
 components: {
  CityHeader,
  Search,
  List,
  Alphabet
 },
 methods:{
  getCityInfo () {
   axios.get(\'/api/city.json\').then(this.getCityInfoSucc)
  },
  getCityInfoSucc(res){
    res = res.data
   if (res.ret && res.data) {
    const data = res.data
    this.hotCity = data.hotCities
    this.cities = data.cities
   }
   console.log(this.cities)
  },
  handleLetterChang(letter) { //接受子组件传过来的
//   console.log(letter)
   this.letter = letter
  }
 },
 mounted () {
  this.getCityInfo ()
 }
}
</script>
<style scoped lang=\"stylus\">
</style>

把得到的数据分次传递个对应的子组件，这样有利于网站优化，不用频繁的请数据

<template>
 <div class=\"city\">
  <CityHeader></CityHeader>
  <Search :list=\"cities\"></Search>
  <List :hot=\"hotCity\" :letter=\"letter\" :list=\"cities\"></List>
  <Alphabet @chang=\"handleLetterChang\" :list=\"cities\"></Alphabet>
 </div>
</template>
export default {
 data () {
  return {
   cities:{}, // 城市列表
   hotCity:[], //热门城市
   letter: \'\' // A-Z
  }
 },
 components: {
  CityHeader,
  Search,
  List,
  Alphabet
 },
 methods:{
  getCityInfo () {
   axios.get(\'/api/city.json\').then(this.getCityInfoSucc) //请求本地配置的mock数据
  },
  getCityInfoSucc(res){
    res = res.data
   if (res.ret && res.data) {
    const data = res.data
    this.hotCity = data.hotCities
    this.cities = data.cities
   }
  }
 },
 mounted () {
  this.getCityInfo ()
 }
}

创建头部组件，

<template>
 <div class=\"header\">
  城市选择
  <router-link to=\"/\">
   <div class=\"iconfont back-icon\"></div>
  </router-link>
 </div>
</template>
<script>
export default {
}
</script>
<style scoped lang=\"stylus\">
@import \'~styles/varibles.styl\';
@import \'~styles/mixins.styl\';
.header
 overflow: hidden
 height $headerHeight
 line-height: $headerHeight
 text-align: center
 color: #fff
 background: $bgColor
 font-size: .4rem
 .back-icon
  position: absolute
  left: 0
  top: 0
  width: .64rem
  font-size: .4rem
  text-align: center
  color: #fff
</style>

创建搜索组件页面，接受父组件传递的数据，引入better-scroll第三方插件，实现列表滚动

<template>
 <div>
  <div class=\"search\">
   <input v-model=\"keyword\" class=\"search-input\" type=\"text\" placeholder=\"输入城市名或者拼音\" />
  </div>
  <div class=\"search-content\" ref=\"search\" v-show=\"keyword\">
   <ul>
    <li class=\"serach-item border-bottom\" v-for=\"item in listItem\" :key=\"item.id\">{{item.name}}</li>
    <li v-show=\"hasNoData\" class=\"serach-item border-bottom\">没有搜索到匹配的数据</li>
   </ul>
  </div>
 </div>
</template>
<script>
import BScroll from \'better-scroll\'
export default {
 props: {
   list: Object,
 },
 data() {
  return {
   keyword:\'\',
   listItem:[],
   timer:null
  }
 },
 computed: {
  hasNoData() {
   return !this.listItem.length //没有搜索的条件是否显示
  }
 },
 watch: {
  keyword () {
   if (this.timer) {
    clearTimeout(this.timer)
   }
   if(!this.keyword) { //清空
    this.listItem = \"\"
    return
   }
   this.timer = setTimeout(() => {
    const result = []
    for (let i in this.list) {
     this.list[i].forEach((value) => { //匹配搜索的条件
      if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1) {
       result.push(value)
      }
     })
    }
    this.listItem= result
   },100)
  }
 },
 mounted () {
  this.scroll = new BScroll(this.$refs.search)
 }
}
</script>
<style scoped lang=\"stylus\">
@import \'~styles/varibles.styl\'
@import \'~styles/mixins.styl\'
.search
 height: .72rem
 padding: 0 .1rem
 background:$bgColor
 .search-input
  box-sizing: border-box
  width:100%
  height: .62rem
  line-height: .62rem
  text-align: center
  border-radius: .06rem
  padding: 0 .1rem
  color: #666
.search-content 
 z-index: 1
 overflow:hidden
 position:absolute
 top: 1.58rem
 left: 0
 right: 0
 bottom: 0
 background: #eee
 .serach-item
  line-height: .62rem
  padding-left:.2rem
  color:#666
  background: #fff
</style>

创建城市列表组件，引入better-scroll插件，实现列表滚动，通过watch监听letter，实现字母与城市列表滚动

<template>
 <div class=\"list\" ref=\"wrapper\">
  <div>
   <div class=\"area\">
    <div class=\"title border-topbottom\">当前城市</div>
    <div class=\"button-list\">
     <div class=\"button-wrapper\">
      <div class=\"button\">郑州</div>
     </div>
    </div>
   </div>
   <div class=\"area\">
    <div class=\"title border-topbottom\">热门城市</div>
    <div class=\"button-list\">
     <div class=\"button-wrapper\" v-for=\"item in hot\" :key=\"item.id\">
      <div class=\"button\">{{item.name}}</div>
     </div>
    </div>
   </div>
   <div class=\"area\" 
    v-for=\"(item,key) in list\" 
    :ref=\"key\"
    :key=\"key\">
    <div class=\"title border-topbottom\">{{key}}</div>
    <ul class=\"item-list\">
     <li class=\"item border-bottom\"
       v-for=\"listInner in item\"
       :key=\"listInner.id\"
     >{{listInner.name}}</li>
    </ul>
   </div>
  </div>
 </div>
</template>
<script>
import BScroll from \'better-scroll\'
export default {
 props: {
   hot: Array,
   list: Object,
   letter:String
  },
 mounted () {
  this.scroll = new BScroll(this.$refs.wrapper)
 },
 watch:{
  letter () { //监听列表滚动事件 A-Z
   if(this.letter) {
    const element = this.$refs[this.letter][0]
    this.scroll.scrollToElement(element)
   }
  }
 }
}
</script>
<style scoped lang=\"stylus\">
@import \'~styles/varibles.styl\';
@import \'~styles/mixins.styl\';
.border-topbottom
 &:before
  background: #ccc
 &:after
  background:#ccc
.border-bottom
 &:before
  background: #ccc
.list
 overflow: hidden
 position:absolute
 top:1.58rem
 left:0
 right:0
 bottom:0
 .title
  line-height: .54rem;
  background: #eee;
  padding-left: .2rem;
  color: #666;
  font-size: .26rem;
 .button-list
  overflow:hidden
  padding: .1rem .6rem .1rem .1rem
  .button-wrapper
   float:left
   width:33.33%
   .button
    margin: .1rem
    padding: .1rem 0
    text-align: center
    border: .02rem solid #ccc
    border-radius: .06rem
 .item-list
  .item
   line-height: .76rem
   color:#212121
   padding-left: .2rem
   font-size: .28rem
   text-overflow: ellipsis
   white-space: nowrap
</style>

创建字母组件，点击字母，左边列表城市想对应，通过this.$emit事件，子组件在触发的事件传递给父组件，父组件通过子组件传递的事件，在传递给List组件，

<template>
 <div class=\"list\">
  <li class=\"item\"
   :ref=\"item\"
    @click=\"handeClick\" 
    @touchstart=\"handleTouchStart\" 
    @touchmove=\"handleTouchMove\" 
    @touchend= \"handleTouchEnd\"
    v-for=\"item of letter\" 
    :key=\"item\">{{item}}</li>
 </div>
</template>
<script>
export default {
 props: {
   list: Object
 },
 data () {
  return {
   touchstart:false,
   startY:0,
   timer: null
  }
 },
 updated () {
  this.startY = this.$refs[\'A\'][0].offsetTop
 },
 computed: {
  letter () {
   const letter =[]
   for (let i in this.list) { //循环A-Z
    letter.push(i)
   }
   return letter
  }
 },
 methods: {
  handeClick(e) {
   this.$emit(\'chang\',e.target.innerText) //传给父组件City
  },
  handleTouchStart () {
   // 手指放上
   this.touchstart = true
  },
  handleTouchMove (e) {
   // 手指移动
   if(this.touchstart) {
    if(this.timer) {
     clearInterval(this.timer)
    }
    this.timer = setTimeout(() => {
     const touchY = e.touches[0].clientY -79 //到蓝色头部的距离
     const index = Math.floor((touchY - this.startY ) / 20)
     if(index >=0 && index < this.letter.length) {
      this.$emit(\'chang\',this.letter[index])
     }
    },16)
   }
  },
  handleTouchEnd () {
   // 手指离开
   this.touchstart = false
  }
 }
}
</script>
<style scoped lang=\"stylus\">
@import \'~styles/varibles.styl\';
@import \'~styles/mixins.styl\';
.list
 display: flex
 flex-direction:column
 justify-content: center
 position:absolute
 top: 1.58rem
 right: 0
 bottom: 0
 width: .4rem
 .item
  line-height:.44rem
  text-align: center
  color: $bgColor
  list-style:none
</style>

以上所述是小编给大家介绍的vue实现城市列表选择功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！