Vue版轮播图

yang 2020-11-09 14:29:30
vue 技术开发 SegmentFault 轮播


mySwiper.vue

<template>
<div class="swiper-box" ref="swiperBox">
<!-- 滑块主体 -->
<div class="swiper-wrapper" :style="{width: width + 'rem', height: oHeight}" @touchstart="startMove"
@touchend="endMove" @touchmove="move" ref="sliderBox">
<slot class="swiper-sliber" />
</div>
<!-- 按钮 -->
<div class="btn-box" v-if="nextBtn" @touchstart="startMove" @touchend="endMove" @touchmove="move">
<p @click.stop="handleLast" :class="{'click': isClickL}"><i class="iconfont icon-arrow-left-s-fill"></i></p>
<p @click.stop="handleNext" :class="{'click': isClickR}"><i class="iconfont icon-arrow-right-s-fill"></i>
</p>
</div>
<!-- 分页文字 -->
<div v-if="pagingText !== 'none'" class="paging-text-box"
:class="{left: pagingPosition === 'left', right: pagingPosition === 'right'}">
<span class="paging">{{pagingText !== 'none'? pagingText : ''}}{{loop ? length-2 + '/' + index : length + '/' + (index + 1)}}</span>
</div>
<!-- 分页器 -->
<div class="hint-list-box" v-if="paging !== 'none'">
<ul class="hint-list" :class="{center: paging === 'center', right: paging === 'right' }">
<li class="item" v-for="item in hintLen" :key="item"
:class="{active: (item === index && loop === true) || (!loop && item === index + 1)}">
</li>
</ul>
</div>
</div>
</template>
<script>
export default {
name: 'my-swiper',
data() {
return {
startX: 0,
endX: 0,
nowLeft: 0,
isClickL: false,
isClickR: false,
length: 0,
index: 0,
width: 0,
resistance: 1,
itemWidth: 0,
timer: null,
autoTimer: null,
zoomTimer: null
}
},
props: {
oHeight: { //设置组件高度
type: String,
default: 'auto'
},
nextBtn: { //是否显示切换按钮默认false
type: Boolean,
default: false
},
loop: { //是否循环播放默认false
type: Boolean,
default: false
},
paging: { // 是否显示分页器默认none不显示 可选 left, center, right
type: String,
default: 'center'
},
pagingText: { // 是否显示页数 默认none不显示 传入字符串为页数文字前缀
type: String,
default: 'none'
},
pagingPosition: { //页数定位默认center居中 可选left right
type: String,
default: 'center'
},
defaultIndex: { //默认开始轮播索引 默认0 请填写你传入元素长度内的 数字
type: Number,
default: 0
},
automation: { // 是否自动轮播 为0时不自动轮播 默认3000 每3000ms轮播一次
type: Number,
default: 0
},
zoom: { // 是否启动zoom模式 要配合子组件宽度一起使用 必须在loop模式下开启
type: Boolean,
default: false
},
retract: { // 是否缩进显示 要配合子组件宽度一起使用 必须在loop模式下开启
type: Boolean,
default: false
}
},
methods: {
// 手指点击时触发方法, 主要记录手指要开始滑动时x坐标用于计算滑动结束与开始的差值, 触控时清除 自动轮播与轮播动画的定时器
startMove(e) {
clearInterval(this.timer) // 清除轮播动画定时器
clearInterval(this.autoTimer) // 清除自动轮播定时器
this.startX = e.targetTouches[0].clientX // 获取触控时x坐标
this.nowLeft = this.$refs.sliderBox.offsetLeft // 记录当前滑块left值
},
// 手指拖动时触发的,滑动动画
slider(nowX) {
if (this.$refs.sliderBox.offsetLeft > 0 && !this.loop) { // 不是循环模式下 在第一个元素向右拖拽时速度衰减
this.resistance += 0.03
window.console.log(55555)
this.$refs.sliderBox.style.left = (nowX - this.startX) / this.resistance + 'px'
return
} else if (this.$refs.sliderBox.offsetLeft < -this.maxLeft && !this.loop) { // 不是循环模式下 在最后一个元素向左拖拽时速度衰减
this.resistance += 0.03
this.$refs.sliderBox.style.left = this.nowLeft + (nowX - this.startX) / this.resistance + 'px'
return
}
this.$refs.sliderBox.style.left = this.nowLeft + (nowX - this.startX) + 'px'
},
// 根据子元素计算 滑块宽度
getItemDom() {
let itemArr = Array.prototype.slice.call(this.$refs.sliderBox.children, 0)
this.length = this.$refs.sliderBox.children.length
itemArr.forEach((ele) => {
this.width += parseFloat(ele.style.width)
})
},
// zoom模式下滑动动画
zoomMove(nowX) {
if (nowX - this.startX < 0) {
let scale = (-(nowX - this.startX) * 0.001) + 0.8 > 1 ? 1 : (-(nowX - this.startX) * 0.001) + 0.8
let opacity = (-(nowX - this.startX) * 0.001) + 0.5 > 1 ? 1 : (-(nowX - this.startX) * 0.0015) + 0.5
this.$refs.sliderBox.children[this.index + 1].style.transform = 'scale(' + scale + ')'
this.$refs.sliderBox.children[this.index + 1].style.opacity = opacity
} else {
let scale = ((nowX - this.startX) * 0.001) + 0.8 > 1 ? 1 : ((nowX - this.startX) * 0.001) + 0.8
let opacity = ((nowX - this.startX) * 0.001) + 0.5 > 1 ? 1 : ((nowX - this.startX) * 0.0015) + 0.5
this.$refs.sliderBox.children[this.index - 1].style.transform = 'scale(' + scale + ')'
this.$refs.sliderBox.children[this.index - 1].style.opacity = opacity
}
},
// 手指拖动时触发该方法
move(e) {
let nowX = e.targetTouches[0].clientX
this.slider(nowX) // 调用滑动动画函数
this.zoom && this.zoomMove(nowX) // 调用zoom动画函数
},
// 拖动结束时触发 该方法
endMove(e) {
this.endX = e.changedTouches[0].clientX
if (this.resistance !== 1) this.resistance = 1
// 判断拖动距离 是否改变index
if (this.distance > 50) {
this.handleLast('touch')
} else if (this.distance < -50) {
this.handleNext('touch')
} else {
this.animation(this.$refs.sliderBox, this.target)
}
// 在自动轮播时 拖动结束重新启动定时器
this.autoTimer = this.automation ? this.handleAuto() : null
},
// 切换下一个函数, 主要以改变index方式切换
handleLast(isTouch) {
this.isClickL = true
if (!this.loop) {
if (!this.index && isTouch !== 'touch') {
this.index = this.length - 1
} else if (this.index) {
this.index--
} else {
this.animation(this.$refs.sliderBox, this.target)
}
} else {
if (this.index === 1) {
this.transposition()
this.index = this.length - 2
} else {
this.index--
}
}
this.zoom && this.$refs.sliderBox && this.zoomAnimation(this.$refs.sliderBox.children[this.index])
setTimeout(() => {
this.isClickL = false
}, 300)
},
// 切换上一个函数, 主要以改变index方式切换
handleNext(isTouch) {
this.isClickR = true
if (!this.loop) {
if (this.index === this.length - 1 && isTouch !== 'touch') {
this.index = 0
} else if (this.index !== this.length - 1) {
this.index++
} else {
this.animation(this.$refs.sliderBox, this.target)
}
} else {
if (this.index === this.length - 2) {
this.transposition('isLast')
this.index = 1
} else {
this.index++
}
}
this.zoom && this.$refs.sliderBox && this.zoomAnimation(this.$refs.sliderBox.children[this.index])
setTimeout(() => {
this.isClickR = false
}, 300)
},
// 切换动画
animation(dom, target) {
clearInterval(this.timer)
let origin = null
let speed = null
this.timer = setInterval(() => {
origin = dom.offsetLeft
speed = (target - origin) / 9
speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed)
if (Math.abs(target - dom.offsetLeft) < 2) {
dom.style.left = target + 'px'
clearInterval(this.timer)
return
}
dom.style.left = origin + speed + 'px'
}, 16)
this.endX = 0
this.startX = 0
if (this.zoom) {
this.isZoomActive()
}
},
// zoom动画
zoomAnimation(dom) {
clearInterval(this.zoomTimer)
let originScale = Number(this.getDomTransform(dom, 'scale'))
let originOpacity = Number(dom.style.opacity)
if (originScale === 1 && originOpacity === 1) {
clearInterval(this.zoomTimer)
return
}
let speed = 0.02
this.zoomTimer = setInterval(() => {
if (originScale >= 1 && originOpacity >= 1) {
clearInterval(this.zoomTimer)
return
}
originScale += speed
originOpacity += speed
dom.style.transform = originScale > 1 ? `scale(1)` : `scale(${originScale})`
dom.style.opacity = originOpacity
}, 16)
},
// 获取元素transform函数
getDomTransform(dom, type) {
let transformStr = dom.style.transform
let tarnArr = transformStr.split(' ')
let obj = {}
tarnArr.forEach(item => {
let tempArr = item.split('(')
obj[tempArr[0]] = tempArr[1].slice(0, -1)
})
return type ? obj[type] : obj
},
// loop模式的前期渲染函数, 感觉这里写的不是很美丽关键是想把,滑块中的每一项以标签形式传进来,没想到更好的方法,如果是数组的形式就要好些
renderLoop() {
if (this.loop) {
let divArr = Array.prototype.slice.call(this.$refs.sliderBox.children, 0)
let len = divArr.length
let deviceWidth = document.documentElement.clientWidth
let first = divArr[0].cloneNode(true)
let last = divArr[len - 1].cloneNode(true)
this.$refs.sliderBox.appendChild(first)
this.$refs.sliderBox.insertBefore(last, this.$refs.sliderBox.children[0])
setTimeout(() => {
this.$refs.sliderBox.style.left = -(this.defaultIndex + 1) * this.$refs.sliderBox.children[0].offsetWidth + (deviceWidth - this.$refs.sliderBox.children[0].offsetWidth)/2 + 'px'
window.console.log('-----', this.$refs.sliderBox.style.left)
if (this.defaultIndex <= this.length - 1) {
this.index = this.defaultIndex + 1
}
})
} else {
setTimeout(() => {
this.$refs.sliderBox.style.left = -this.defaultIndex * this.$refs.sliderBox.children[0].offsetWidth + 'px'
this.index = this.defaultIndex
})
}
this.getItemDom()
},
// zoom模式中样式调整
isZoomActive() {
if (this.$refs.sliderBox) {
for (let i = 0; i < this.$refs.sliderBox.children.length; i++) {
if (i !== this.index) {
this.$refs.sliderBox.children[i].style.transform = 'scale(0.8)'
this.$refs.sliderBox.children[i].style.opacity = '0.5'
} else {
this.$refs.sliderBox.children[i].style.transform = 'scale(1)'
this.$refs.sliderBox.children[i].style.opacity = '1'
}
}
}
},
// 循环模式中的换位函数
transposition(isLast) {
if (isLast) {
if (this.$refs.sliderBox) this.$refs.sliderBox.style.left = this.distance + 'px'
return
}
this.$refs.sliderBox.style.left = -(this.length - 1) * this.$refs.sliderBox.children[0].offsetWidth + this.distance + 'px'
},
// 启动自动模式
handleAuto() {
if (this.automation) {
return (setInterval(() => {
this.handleNext()
}, this.automation))
}
}
},
computed: {
// 手指触碰与离开的差值
distance() {
return this.endX - this.startX
},
// 计算滑块目的地
target() {
if (this.swiperWidth - this.$refs.sliderBox.children[0].offsetWidth !== 0 && this.retract) {
return -this.index * this.$refs.sliderBox.children[0].offsetWidth + (this.swiperWidth - this.$refs.sliderBox.children[0].offsetWidth) / 2
}
return -this.index * this.$refs.sliderBox.children[0].offsetWidth
},
// 分页个数
hintLen() {
return this.loop && this.length ? this.length - 2 : this.length
},
// box宽度
swiperWidth() {
return this.$refs.swiperBox && this.$refs.swiperBox.offsetWidth
},
// 滑块极限值
maxLeft() {
return this.$refs.sliderBox && this.$refs.sliderBox.offsetWidth - this.$refs.sliderBox.children[0].offsetWidth
}
},
watch: {
// 监控index变化
index() {
this.animation(this.$refs.sliderBox, this.target)
}
},
mounted() {
this.renderLoop()
this.autoTimer = this.automation ? this.handleAuto() : null
},
beforeDestroy() {
clearInterval(this.timer)
clearInterval(this.autoTimer)
clearInterval(this.zoomTimer)
}
}
</script>
<style lang="scss" scoped>
.swiper-box {
width: 100%;
overflow: hidden;
position: relative;
.swiper-wrapper {
position: relative;
overflow: hidden;
display: flex;
}
.btn-box {
position: absolute;
width: 100%;
top: 50%;
display: flex;
justify-content: space-between;
transform: translateY(-50%);
overflow: hidden;
p {
overflow: hidden;
color: rgba(4, 4, 4, .4);
background-color: rgba(8, 8, 8, .1);
&.click {
background-color: rgba(8, 8, 8, .6);
.iconfont {
color: rgba(4, 4, 4, .6);
}
}
.iconfont {
font-size: .8rem;
}
}
}
.hint-list-box {
position: absolute;
width: 100%;
bottom: .2rem;
.hint-list {
display: flex;
&.center {
justify-content: center;
}
&.right {
justify-content: flex-end;
}
}
.item {
width: .2rem;
height: .2rem;
border-radius: 50%;
background-color: #eeeeec;
margin-left: .2rem;
&.active {
background: linear-gradient(#6a3, #4e6);
}
}
}
.paging-text-box {
position: absolute;
top: .1rem;
text-align: center;
width: 100%;
&.right {
text-align: right;
span {
margin-right: 1rem;
}
}
&.left {
text-align: left;
span {
margin-left: 1rem;
}
}
}
}
</style>

mySwiperItem.vue

<!--
* @Author: yang
* @Date: 2020-11-09 07:04:39
* @LastEditors: yang
* @LastEditTime: 2020-11-09 10:45:21
* @FilePath: \gloud-h5\src\component\index\mySwiperItem.vue
-->
<template>
<div :style="{height: height + 'rem', width: width + 'rem'}" class="item-wrapper" >
<slot :ref="'item' + name"></slot>
</div>
</template>
<script>
export default {
name: "my-swiper-item",
props: {
width: {
type: Number,
required: true
},
height: {
type: String,
default: '4'
}
}
}
</script>
<style scoped>
</style>

使用的是css预编译less

npm install --save-dev less less-loader css-loader style-loader

使用
index.vue

<template>
<div class="show-swiper-wrapper">
<p class="show-toast-title">轮播图展示</p>
<div class="item">
<divider>基础调用</divider>
<my-swiper>
<my-swiper-item :width="7.5" v-for="item in list" :key="item.id" >
<img :src="item.img" alt="">
</my-swiper-item>
</my-swiper>
</div>
<div class="item">
<divider>自动轮播</divider>
<my-swiper :automation="2000" paging="right">
<my-swiper-item :width="7.5" v-for="item in list" :key="item.id">
<img :src="item.img" alt="">
</my-swiper-item>
</my-swiper>
</div>
<div class="item">
<divider>循环有按钮</divider>
<my-swiper :nextBtn="true" :automation="2000" :loop="true" paging="left">
<my-swiper-item :width="7.5" v-for="item in list" :key="item.id">
<img :src="item.img" alt="">
</my-swiper-item>
</my-swiper>
</div>
<div class="item">
<divider>缩进模式</divider>
<my-swiper :zoom="true" :retract="true" :automation="3000" :oHeight="'3rem'" eight="3" :loop="true" paging="none">
<my-swiper-item :width="5" height="3" v-for="item in list" :key="item.id">
<img :src="item.img" alt="">
</my-swiper-item>
</my-swiper>
</div>
<divider>查看源码</divider>
<my-button class="button-item" @button-click="pushLink" text="查看demo源码" size="lang" />
</div>
</template>
<script>
import MySwiper from './components/slider/mySwiper'
import MySwiperItem from './components/slider/mySwiperItem'
import Divider from './components/divider'
import MyButton from './components/myButton'
export default {
name: 'showSwiper',
components: {
MySwiper,
MySwiperItem,
Divider,
MyButton
},
data() {
return {
// 拿到本地实验要换路径偶
list: [
{
img: require('./static/1.jpg'),
id: 1
},
{
img: require('./static/2.jpg'),
id: 2
},
{
img: require('./static/3.jpg'),
id: 3
},
{
img: require('./static/4.jpg'),
id: 4
}
]
}
},
methods: {
pushLink() {
this.$router.push(`/soundCodeShow${this.$route.fullPath}`)
}
}
}
</script>
<style scoped lang="less">
.show-swiper-wrapper {
display: flex;
flex-direction: column;
align-items: center;
position: relative;
padding-bottom: 1rem;
}
.show-swiper-wrapper .item {
width: 100%;
}
.show-swiper-wrapper .item img {
width: 100%;
height: 100%;
}
</style>

效果:
image.png

版权声明
本文为[yang]所创,转载请带上原文链接,感谢
https://segmentfault.com/a/1190000037771255

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