Vue中使用better-scroll实现轮播图组件

[
	"https://img3.mukewang.com/szimg/5df8852609e0762d12000676-360-202.png",
 "https://img1.mukewang.com/szimg/5d9c62fb0907ccf012000676-360-202.png",
 "https://img3.mukewang.com/5aeecb1d0001e5ea06000338-360-202.jpg"
]

const Mock = require('mockjs')

Mock.mock('/slider', 'get', require('./json/slider.json'))

<template>
 <div class="slider-apply" ref="slider"> <!-- 显示层 -->
 <div class="slider-group" ref="group"> <!-- 所有图片包裹层 -->
 <slot></slot>   <!-- 插槽显示图片内容 -->
 </div>
 <div class="dots">   <!-- 提示圆点 -->
 <div class="dot" v-for="(item, index) in dots" :key="index" :class="currentIndex===index?'active':''"></div>
 </div>
 </div>
</template>

<script type='text/ecmascript-6'>
import BScroll from 'better-scroll'
export default {
 data () {
 return {
 dots: [],
 currentIndex: 0 /* 当前页下标 */
 }
 },
 props: {
 isLoop: { /* 循环播放 */
 type: Boolean,
 default: true
 },
 isAutoPlay: { /* 自动播放 */
 type: Boolean,
 default: true
 },
 interval: { /* 播放间隔 */
 type: Number,
 default: 2000
 }
 },
 mounted () { /* mounted阶段dom渲染完，20ms确保刷新 */
 setTimeout(() => {
 this.setSliderWidth()
 this.initDots()
 this.initSlider()
 if (this.isAutoPlay) {
 this.autoPlay()
 }
 }, 20)
 },
 methods: {
 setSliderWidth () { /* 获取显示层宽度，计算内容层宽度 */
 const clientWidth = this.$refs.slider.clientWidth
 let sliderWidth = 0
 this.children = this.$refs.group.children
 for (let i = 0; i < this.children.length; i++) {
 this.children[i].style.width = clientWidth + 'px'
 sliderWidth += clientWidth
 }
 if (this.isLoop) { /* 循环播放需要增加前后两个宽度 */
 sliderWidth += clientWidth * 2
 }
 this.$refs.group.style.width = sliderWidth + 'px' /* 设置内容层宽度 */
 },
 initDots () {
 this.dots = new Array(this.children.length)
 },
 initSlider () {
 this.slider = new BScroll(this.$refs.slider, {
 scrollX: true, /* 横向滚动 */
 scrollY: false,
 snap: { /* 循环滚动设置 */
  loop: this.isLoop,
  threshold: 0.3,
  speed: 400
 }
 })
 this.slider.on('scrollEnd', () => {
 const pageIndex = this.slider.getCurrentPage().pageX /* 获取当前轮播页，用于圆点提示 */
 this.currentIndex = pageIndex
 if (this.isAutoPlay) {
  clearTimeout(this.timer) /* 重新设置自动播放，否则无法自动播放 */
  this.autoPlay()
 }
 })
 },
 autoPlay () {
 this.timer = setTimeout(() => {
 this.slider.next(400)
 }, this.interval)
 }
 },
 destroyed () { /* 确保清除定时器 */
 clearTimeout(this.timer)
 }
}
</script>

<style lang="stylus" scoped>
.slider-apply
 position relative  // 让dots找准位置
 height 200px
 width 100%   // slider-apply会依据父元素宽度显示宽度
 overflow hidden  // 超出元素隐藏
 border-radius 5px
 .dots
 position absolute
 bottom 10px
 left 50%
 transform translate(-50%, 0) // 居中
 display flex
 .dot
 margin 0 10px
 height 7px
 width 7px
 background #fff
 border-radius 50%
 .active   // 当前dot样式
 width 15px
 border-radius 50% 5px
</style>

<template>
 <div class="slider-wrapper">
 <Slider v-if="showSlider"> <!-- showSlider使得数据请求完成后再显示，否则better-scroll可能会计算错误 -->
 <div v-for="item in imageList" :key="item" class="slider-item">
 <img :src="item" class="img">
 </div>
 </Slider>
 </div>
</template>

<script type='text/ecmascript-6'>
import Slider from 'base/slider'
export default {
 data () {
 return {
 imageList: [], // 图片列表
 showSlider: false // 显示slider标志位
 }
 },
 created () {
 this.getImages() // 获取数据
 },
 methods: {
 getImages () {
 this.axios.get('/slider').then((res) => {
 this.imageList = res.data
 this.showSlider = true
 }).catch((err) => {
 console.log(err)
 })
 }
 },
 components: {
 Slider
 }
}
</script>

<style lang="stylus" scoped>

.slider-wrapper
 margin 0 auto
 height 200px // 固定轮播图显示高度
 width 500px // 固定轮播图显示宽度，可设置百分比
 background #000
 border-radius 5px
 .slider-item
 float left // 元素向左浮动
 width 100%
 overflow hidden
 text-align center
 .img
 height 200px
 width 100%

</style>