成果展示
最後的成果就是下面所展示的內容，因為gif圖沒有做，只能截圖所展示，接下來，會帶著大家一步一步的完成下面功能，腳手架搭建和node安裝在本次案例不會講解，如果瞭解，可以在我的部落格園找到有詳細介紹
準備工作：
引入axios外掛，呼叫better-scroll第三方外掛，本地json檔案，可以參考目錄中的city.json,有條件的也可以自己去扒
功能分析
1.獲取json資料展示城市列表 。
2.側邊字母定位滾動到相應的位置。
3.實現搜尋城市
接下來我們開始對元件進行劃分：本次案例中，總共劃分為五個元件，下面就是元件的劃分圖
建立city元件，通過父元件獲取資料，傳遞給子元件
<template>
<div class="city">
<CityHeader></CityHeader> //頭部
<Search :list="cities"></Search> //搜尋
<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:[], //熱門城市
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) { //接受子元件傳過來的
// console.log(letter)
this.letter = letter
}
},
mounted () {
this.getCityInfo ()
}
}
</script>
<style scoped lang="stylus">
</style>
把得到的資料分次傳遞個對應的子元件，這樣有利於網站優化，不用頻繁的請資料
<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:[], //熱門城市
letter: '' // A-Z
}
},
components: {
CityHeader,
Search,
List,
Alphabet
},
methods:{
getCityInfo () {
axios.get('/api/city.json').then(this.getCityInfoSucc) //請求本地配置的mock資料
},
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 ()
}
}
建立頭部元件，
<template>
<div class="header">
城市選擇
<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: $bgColor
font-size: .4rem
.back-icon
position: absolute
left: 0
top: 0
width: .64rem
font-size: .4rem
text-align: center
color: #fff
</style>
建立搜尋元件頁面，接受父元件傳遞的資料，引入better-scroll第三方外掛，實現列表滾動
<template>
<div>
<div class="search">
<input v-model="keyword" class="search-input" type="text" placeholder="輸入城市名或者拼音" />
</div>
<div class="search-content" ref="search" v-show="keyword">
<ul>
<li class="serach-item border-bottom" v-for="item in listItem" :key="item.id">{{item.name}}</li>
<li v-show="hasNoData" class="serach-item border-bottom">沒有搜尋到匹配的資料</li>
</ul>
</div>
</div>
</template>
<script>
import BScroll from 'better-scroll'
export default {
props: {
list: Object,
},
data() {
return {
keyword:'',
listItem:[],
timer:null
}
},
computed: {
hasNoData() {
return !this.listItem.length //沒有搜尋的條件是否顯示
}
},
watch: {
keyword () {
if (this.timer) {
clearTimeout(this.timer)
}
if(!this.keyword) { //清空
this.listItem = ""
return
}
this.timer = setTimeout(() => {
const result = []
for (let i in this.list) {
this.list[i].forEach((value) => { //匹配搜尋的條件
if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1) {
result.push(value)
}
})
}
this.listItem= result
},100)
}
},
mounted () {
this.scroll = new BScroll(this.$refs.search)
}
}
</script>
<style scoped lang="stylus">
@import '~styles/varibles.styl'
@import '~styles/mixins.styl'
.search
height: .72rem
padding: 0 .1rem
background:$bgColor
.search-input
box-sizing: border-box
width:100%
height: .62rem
line-height: .62rem
text-align: center
border-radius: .06rem
padding: 0 .1rem
color: #666
.search-content
z-index: 1
overflow:hidden
position:absolute
top: 1.58rem
left: 0
right: 0
bottom: 0
background: #eee
.serach-item
line-height: .62rem
padding-left:.2rem
color:#666
background: #fff
</style>
建立城市列表元件，引入better-scroll外掛，實現列表滾動，通過watch監聽letter，實現字母與城市列表滾動
<template>
<div class="list" ref="wrapper">
<div>
<div class="area">
<div class="title border-topbottom">當前城市</div>
<div class="button-list">
<div class="button-wrapper">
<div class="button">鄭州</div>
</div>
</div>
</div>
<div class="area">
<div class="title border-topbottom">熱門城市</div>
<div class="button-list">
<div class="button-wrapper" v-for="item in hot" :key="item.id">
<div class="button">{{item.name}}</div>
</div>
</div>
</div>
<div class="area"
v-for="(item,key) in list"
:ref="key"
:key="key">
<div class="title border-topbottom">{{key}}</div>
<ul class="item-list">
<li class="item border-bottom"
v-for="listInner in item"
:key="listInner.id"
>{{listInner.name}}</li>
</ul>
</div>
</div>
</div>
</template>
<script>
import BScroll from 'better-scroll'
export default {
props: {
hot: Array,
list: Object,
letter:String
},
mounted () {
this.scroll = new BScroll(this.$refs.wrapper)
},
watch:{
letter () { //監聽列表滾動事件 A-Z
if(this.letter) {
const element = this.$refs[this.letter][0]
this.scroll.scrollToElement(element)
}
}
}
}
</script>
<style scoped lang="stylus">
@import '~styles/varibles.styl';
@import '~styles/mixins.styl';
.border-topbottom
&:before
background: #ccc
&:after
background:#ccc
.border-bottom
&:before
background: #ccc
.list
overflow: hidden
position:absolute
top:1.58rem
left:0
right:0
bottom:0
.title
line-height: .54rem;
background: #eee;
padding-left: .2rem;
color: #666;
font-size: .26rem;
.button-list
overflow:hidden
padding: .1rem .6rem .1rem .1rem
.button-wrapper
float:left
width:33.33%
.button
margin: .1rem
padding: .1rem 0
text-align: center
border: .02rem solid #ccc
border-radius: .06rem
.item-list
.item
line-height: .76rem
color:#212121
padding-left: .2rem
font-size: .28rem
text-overflow: ellipsis
white-space: nowrap
</style>
建立字母元件，點選字母，左邊列表城市想對應，通過this.$emit事件，子元件在觸發的事件傳遞給父元件，父元件通過子元件傳遞的事件，在傳遞給List元件，
<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.$refs['A'][0].offsetTop
},
computed: {
letter () {
const letter =[]
for (let i in this.list) { //迴圈A-Z
letter.push(i)
}
return letter
}
},
methods: {
handeClick(e) {
this.$emit('chang',e.target.innerText) //傳給父元件City
},
handleTouchStart () {
// 手指放上
this.touchstart = true
},
handleTouchMove (e) {
// 手指移動
if(this.touchstart) {
if(this.timer) {
clearInterval(this.timer)
}
this.timer = setTimeout(() => {
const touchY = e.touches[0].clientY -79 //到藍色頭部的距離
const index = Math.floor((touchY - this.startY ) / 20)
if(index >=0 && index < this.letter.length) {
this.$emit('chang',this.letter[index])
}
},16)
}
},
handleTouchEnd () {
// 手指離開
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>
以上都是所有本次的內容，如果喜歡可以關注一下