用vue怎样写个简单的公共轮播图组件

html和js部分

<template>
 <div
  class="img-box"
  ref="img-box"
  :style="{width: styles.width, height: styles.height}"
 >
  <div v-for="(item, index) in imgList"
    :key="index"
    class="img-item"
    :ref="'img-item-' + index"
    :class="{'active': index === active}"
  >
   <img
    :src="item"
    style="width:100%"
    :style="{height: styles.height}"
   />
  </div>
  <div
   class="img-position"
   v-if="isShowPosition"
  >
   <template v-for="(item, index) in imgList">
    <span :key="index"
       class="img-position-item"
       :ref="'img-position-' + index"
       :class="[
        {'active': index === active},
        isCircle ? 'circle' : '',
        isNums ? 'nums' : ''
       ]"
       @click="clickSpan(index)"
    >
     {{isNums ? index + 1 : ''}}
    </span>
   </template>
  </div>
  <div
   class="left-btn"
   v-if="isShowLeftOrRightBtn"
   @click="clickBtn('left')"
  >
   <i class="iconfont roll-zuo"></i>
  </div>
  <div
   class="right-btn"
   v-if="isShowLeftOrRightBtn"
   @click="clickBtn('right')"
  >
   <i class="iconfont roll-you"></i>
  </div>
 </div>
</template>

<script>
export default {
 name: 'Roll',
 props: {
  imgList: { // 图片列表 src数组
   type: Array,
   default: () => []
  },
  isShowPosition: { // 是否显示下方小圆点
   type: Boolean,
   default: true
  },
  positionInner: { // 圆点内容
   type: String,
   default: 'circle' // 默认圆点，可选值 circle => 圆点 num => 数字 both => 圆点+数字
  },
  isShowLeftOrRightBtn: { // 是否显示左右按钮
   type: Boolean,
   default: true
  },
  duration: { // 切换间隔
   type: [Number, String],
   default: 3000
  },
  styles: { // 自定义轮播图片宽高 默认500*300
   type: Object,
   default: () => {
    return {
     width: '500px',
     height: '300px'
    }
   }
  }
 },
 data () {
  return {
   active: 0, // 当前轮播图片
   timer: null // 定时器
  }
 },
 computed: {
  isCircle () {
   return ['circle', 'both'].includes(this.positionInner)
  },
  isNums () {
   return ['num', 'both'].includes(this.positionInner)
  }
 },
 updated () {
  if (this.timer) this.clearTimer()
  this.setTimer()
 },
 created () {
  this.setTimer()
 },
 methods: {
  clickSpan (index) {
   this.clearTimer()
   this.active = index
  },
  clickBtn (arg) {
   this.clearTimer()
   if (arg === 'left') {
    this.active = this.active - 1 < 0 ? this.imgList.length - 1 : this.active - 1
   } else {
    this.active = this.active + 1 === this.imgList.length ? 0 : this.active + 1
   }
   this.setTimer()
  },
  setTimer () {
   this.timer = setInterval(() => {
    this.clickBtn('right')
   }, Number(this.duration))
  },
  clearTimer () {
   clearInterval(this.timer)
   this.timer = null
  }
 }
}
</script>

css样式部分

<style scoped>
@import url('//at.alicdn.com/t/font_1451815_senarwrqu6.css');
* {
 margin: 0;
 padding: 0;
}
.img-box {
 position: relative;
 margin: 0 auto;
}
.img-item {
 height: 100%;
 width: 100%;
 opacity: 0;
 position: absolute;
 top: 0;
 right: 0;
 left: 0;
 bottom: 0;
 z-index: -5;
 text-align: center;
}
.img-item.active {
 z-index: 0;
 opacity: 1;
 transition: .3s;
}
.img-position {
 position: absolute;
 bottom: 5px;
 left: 50%;
 display: flex;
 transform: translate(-50%, 0);
}
.img-position-item {
 display: inline-block;
 width:10px;
 height:10px;
 box-sizing: border-box;
 cursor: pointer;
}
.img-position-item.circle {
 border-radius: 50%;
 border: 1px solid #606266;
}
.img-position-item.nums {
 width: 18px;
 height: 18px;
 display: flex;
 justify-content: center;
 align-items: center;
 color: #606266;
 font-size:14px;
}
.img-position-item:hover, .img-position-item.active {
 border-color: #d1d2d3;
 color: #d1d2d3;
 transition: .3s;
}
.img-position-item + .img-position-item {
 margin-left: 10px;
}
.left-btn, .right-btn {
 position: absolute;
 top: 50%;
 bottom: 0;
 width: 20px;
 height: 30px;
 display: flex;
 justify-content: center;
 align-items: center;
 cursor: pointer;
 color: #d1d2d3;
 font-size: 20px;
 transform: translate(0, -50%);
}
.left-btn:hover, .right-btn:hover {
 color: #fff;
 transition: .3s;
}
.left-btn {
 left: 5px;
}
.right-btn {
 right: 5px;
}
</style>

只是简单的实现了一个轮播图比较基础的部分，之前用原生写了一遍，现在用vue写一遍作为一个组件，也还不错