大家好！先上图看看本次案例的整体效果。

       实现思路：

Vue component实现大转盘组件，可以嵌套到任意要使用的页面。

css3 transform控制大转盘抽奖过程的动画效果。

抽奖组件内使用钩子函数watch监听抽奖结果的返回情况播放大转盘动画并给用户弹出中奖提示。

中奖结果弹窗，为抽奖组件服务。

       实现步骤如下：

 构建api奖品配置信息和抽奖接口，vuex全局存放奖品配置和中奖结果数据信息。

api：

export default {
 getPrizeList () {
  let prizeList = [
   {
    id: 1,
    name: '小米8',
    img: 'https://i1.mifile.cn/f/i/g/2015/cn-index/m8-140.png'
   },
   {
    id: 2,
    name: '小米电视',
    img: 'https://i1.mifile.cn/f/i/g/2015/TV4A-43QC.png'
   }, {
    id: 3,
    name: '小米平衡车',
    img: 'https://i1.mifile.cn/f/i/g/2015/cn-index/scooter-140!140x140.jpg'
   }, {
    id: 4,
    name: '小米耳机',
    img: 'https://c1.mifile.cn/f/i/g/2015/video/pinpai140!140x140.jpg'
   }
  ]
  return prizeList
 },
 lottery () {
  return {
   id: 4,
   name: '小米耳机',
   img: 'https://c1.mifile.cn/f/i/g/2015/video/pinpai140!140x140.jpg'
  }
 }
}

store:

import lotteryApi from '../../api/lottery.api.js'
const state = {
 prizeList: [],
 lotteryResult: {}
}
const getters = {
 prizeList: state => state.prizeList,
 lotteryResult: state => state.lotteryResult
}
const mutations = {
 SetPrizeList (state, { prizeList }) {
  state.prizeList = prizeList
 },
 SetLotteryResult (state, { lotteryResult }) {
  state.lotteryResult = lotteryResult
 }
}
const actions = {
 getPrizeList ({ commit }) {
  let result = lotteryApi.getPrizeList()
  commit('SetPrizeList', { prizeList: result })
 },
 lottery ({ commit }) {
  let result = lotteryApi.lottery()
  commit('SetLotteryResult', { lotteryResult: result })
 }
}

export default {
 state,
 getters,
 mutations,
 actions,
 namespaced: true
}

编写抽奖组件，为保证通用性，组件只负责播放抽奖结果。接收两个数据和一个方法，如下：

数据一：预置的奖品列表数据（轮播奖品需要）

数据二：抽奖结果，播放抽奖动画和弹出中奖结果需要

方法：抽奖动作，返回的抽奖结果数据即为数据二，响应式传递给组件

大概代码思路如下（仅供参考，不可运行）

<template>
 <section>
  <div class="lucky-item">
   <img src="//www.cnblogs.com/images/cnblogs_com/codeon/878827/o_backImage.jpg"
      alt>
   <div class="lucky-box">
    <img src="//www.cnblogs.com/images/cnblogs_com/codeon/878827/o_circle.jpg"
       alt>
    <ul 
      class="wheel-list"
      :
      :class="transition">
     <li v-for="(prize,index) in slotPrizes"
       :
       v-bind:key="index">
      <div class="fan-item"
         ></div>
      <div class="lucky-prize">
       <h3>{{prize.name}}</h3>
      </div>
     </li>
    </ul>
    <div class="wheel-btn"
       @click="$emit('lottery')">
     <a>
      <img src="//images.cnblogs.com/cnblogs_com/codeon/878827/o_go.jpg"
         alt>
     </a>
    </div>
   </div>
   <prize-pop :prize="lotteryResult"
         v-if="showPrize"
         @closeLotteryPop="showPrize=false" />
  </div>
 </section>
</template>
<script>
import PrizePop from './common/prize-pop.vue'
export default {
 name: 'BigTurntable',
 data () {
  return {
   isStart: false,
   showPrize: false,
   wheelStyle: { 'transform': 'rotate(0deg)' },
   transition: 'transitionclear',
   playTurns: 5 // 默认先旋转5圈
  }
 },
 components: {
  PrizePop
 },
 props: {
  prizes: {
   type: Array,
   required: false
  },
  lotteryResult: {
   type: Object,
   default: () => { }
  }
 },
 computed: {
  slotPrizes () {
   var self = this
   console.log(self.prizes)
   let prizeList = []
   prizeList.push({ ...self.prizes[0], slotIndex: 1 })
   prizeList.push({ name: '谢谢参与', slotIndex: 2 })
   prizeList.push({ ...self.prizes[1], slotIndex: 3 })
   prizeList.push({ name: '谢谢参与', slotIndex: 4 })
   prizeList.push({ ...self.prizes[2], slotIndex: 5 })
   prizeList.push({ name: '谢谢参与', slotIndex: 6 })
   prizeList.push({ ...self.prizes[3], slotIndex: 7 })
   prizeList.push({ name: '谢谢参与', slotIndex: 8 })
   console.log(prizeList)
   return prizeList
  }
 },
 methods: {
  /**
   * 执行抽奖动画
   */
  playWheel (index) {
   
  },
   /**
   * 获取中奖结果所在奖品列表中的索引，以确定抽奖动画最终落在哪个奖品
  */
  getPrizeIndex (prizeId) {
  
  }
 },
 watch: {
/**
   * 监听抽奖结果，一旦有中奖信息就开始执行抽奖动画
   */
  lotteryResult (newVal, oldVal) {
   var self = this
   if (newVal.id && newVal.id > 0) {
    let index = self.getPrizeIndex(newVal.id)
    self.playWheel(index)
   }
  }
 }
}
</script>