定义好奖品下标，计时器开始抽奖，请求接口，出现中奖奖品之后，获取中奖商品对应的奖品下标，再次计时器判断当前移动的小标是否为中奖商品的下标，并且是否转到3圈（防止转1圈就停止），如果时就清除两次计时器。

当前代码封装为九宫格的组件；

vue代码： 

<template><view class="page" v-if="merchantInfo.cdn_static"><image class="bg" :src="merchantInfo.cdn_static +'statistics/luckDrawImg/sudoku/page_bg.png'" mode="aspectFill"></image><view class="content"><view class="logo"><image :src="merchantInfo.logo" mode="heightFix"></image></view><view class="box"><view class="awards"><view class="awardsItem" v-for="(item,index) in awardsList" :key="index" :class="item.active ? 'awardsActive' : ''" @click="startPlay(index)"><view class="play" v-if="index == 4"><view class="go">{{item.title}}</view><view v-if="index == 4" class="count">{{total}}次机会</view></view><image :src="merchantInfo.cdn_static + item.img" v-else></image></view></view><view class="notification"><image :src="merchantInfo.cdn_static +'statistics/luckDrawImg/sudoku/notification.png'" mode="heightFix"></image><text>好礼转不停</text></view><view class="btns"><view class="btn" @click="rule_show=true"><image :src="merchantInfo.cdn_static +'statistics/luckDrawImg/sudoku/rule.png'"></image></view><view class="btn" @click="getResult()"><image :src="merchantInfo.cdn_static +'statistics/luckDrawImg/sudoku/prize.png'"></image></view></view></view></view><view class="win" v-if="rule_show"><scroll-view scroll-y class="win_box .win_box_bg"><mp-html :content="luckDrawInfo.rule" /></scroll-view><text class="iconfont iconcolseIcon theme-font-white" @click="rule_show=false"></text></view><view class="win" v-if="result_show"><view class="win_box1"><image class="win_bg" :src="merchantInfo.cdn_static +'statistics/luckDrawImg/result_bg.png'" mode=""></image><view class="win_content"><view class="win_tips theme-font-white">{{currentPrize.desc}}</view><view class="win_title">{{currentPrize.title}}</view><view class="win_btn" @click="choiseAddress()">{{currentPrize.is_address==1?'选择地址':'确定'}}</view></view></view></view><view class="win" v-if="prize_show"><view class="win_tit theme-font-white">我的奖品</view><view class="win_box2"><view class="items"><view class="left i_title">奖品</view><view class="right i_title">中奖时间</view></view><scroll-view scroll-y class="list"><view class="item" v-for="(item,index) in list" :key="index"><view class="left">{{item.lottery_prize_title}}</view><view class="right" v-if="item.is_address==1&&!item.address_id"><view class="r_btn"  @click="choiseAddress1(item)">去领奖</view></view><view class="right" v-else>{{item.created_time}}</view></view></scroll-view></view><text class="iconfont iconcolseIcon theme-font-white" @click="prize_show=false"></text></view></view></template><script>import { luckDrawInfo } from '@/api/luckDraw.js';import colors from '@/mixins/color';export default {mixins: [colors],data() {return {//https://cdn.dev.scrm.juplus.cn/InQLzDLoAl2S9LyNJUXQ45gpA.pngmask: true,wtf:true,luckDrawInfo: {},rule_show:false,result_show:false,prize_show:false,total:0,currentPrize:{},list:[],id: "",awardsList: [],indexArray: [0, 1, 2, 5, 8, 7, 6, 3],num: 0,count: 0,timer: null}},props: {userId: {type: [Number,String]},type:{type: [Number,String]}},//渲染完了mounted() {this.id = this.userId;this.init();},methods: {/*** 设置奖项*/setAwardsList(data){this.awardsList = [];let arrayBefore = data.length > 0 ? data.slice(0,4) : [];let arrayAfter = data.length > 0 ? data.slice(4) : [];this.awardsList = [...arrayBefore];this.awardsList.push({title: "抽"});this.awardsList = [...this.awardsList,...arrayAfter];this.awardsList.forEach((item,index) => {item.active = index == 4 ? true : false;});},init(){if(this.userInfo){this.getInfo()}else{setTimeout(()=>{this.init()},500)}},getInfo(){luckDrawInfo.getDetail({id:this.id}).then(res => {this.luckDrawInfo=res.datathis.total=res.data.my_can_numthis.setAwardsList(res.data.lottery_prize);this.action('lottery',this.id,0,2,this.luckDrawInfo.title,'','lottery')})},choiseAddress(){this.currentPrize.is_address==1?uni.navigateTo({url:'/pages/address/address'}):''this.result_show=false// 重置抽奖this.awardsList.forEach((item,index) => {item.active = index == 4 ? true : false;});this.num = 0;this.count = 0;this.timer = null;},choiseAddress1(data){this.currentPrize=datauni.navigateTo({url:'/pages/address/address'})this.prize_show=false},setAddress(id){luckDrawInfo.setAddress({address_id:id,history_id:this.currentPrize.history_id||this.currentPrize.id}).then(res => {uni.showToast({title:"地址设置成功",icon:'none'})})},getResult(){if(!this.wtf){return false}luckDrawInfo.getResult({lottery_id:this.id}).then(res => {this.list=res.data.datathis.prize_show=true})},// 点击开始,请求接口抽奖startPlay(index) {if (index != 4) return false;if(this.luckDrawInfo.is_register==1&&!this.userInfo.type){uni.navigateTo({url:'/pages/login/login'})return false}if(this.luckDrawInfo.is_form==1&&this.luckDrawInfo.user_form_count==0){uni.navigateTo({url:'/pages/form/form?id='+this.luckDrawInfo.form_id+'&type_id=' + this.id + '&type=lottery'})return false}if(!this.wtf){return false}// 活动未开始或活动已结束let startTimeMs = new Date(this.luckDrawInfo.start_time).getTime();let endTimeMs = new Date(this.luckDrawInfo.end_time).getTime();let nowTimeMs = new Date().getTime();if (nowTimeMs < startTimeMs) {uni.showToast({icon: "none",title: "活动未开始"})return false;}if (nowTimeMs > endTimeMs) {uni.showToast({icon: "none",title: "活动已结束"})return false;}this.mask = false;this.wtf = false;// 抽奖开始clearInterval(this.timer)this.timer = setInterval(() => {this.awardsList.forEach((item,index) => {item.active = false;});this.awardsList[this.indexArray[this.num]].active = true;this.num++;if (this.num >= this.indexArray.length) {this.num = 0;this.count++;}},100);luckDrawInfo.run({id:this.id}).then(res => {this.currentPrize = res.data;this.total = res.data.row_lottery_new.my_can_num;// 抽奖停止let prizeIndex = this.awardsList.findIndex(item => item.id == this.currentPrize.id);let prizeNumIndex = prizeIndex != -1 ? this.indexArray.findIndex(item => item == prizeIndex) : null;let delayTimer = setInterval(()=>{// 奖品选中if (this.count >= 3 && this.num == prizeNumIndex) {clearInterval(this.timer);clearInterval(delayTimer);this.awardsList.forEach((item,index) => {item.active = index == prizeIndex ? true : false;this.$set(this.awardsList, index, {...this.awardsList[index], active: item.active});});setTimeout(() => {this.result_show = true;this.wtf = true;},600);}},100)}).catch(err => {this.wtf = true;});}}}
</script><style scoped lang="scss">@import 'index.scss';/**/
</style>

scss代码：

.page{width: 750rpx;height: 100vh;position: relative;
}.bg{width: 750rpx;height: 100vh;
}.content{width: 750rpx;min-height: 100vh;height: 1448rpx;position: absolute;top: 0;left: 0;
}.logo{height: 60rpx;display: flex;justify-content: center;margin-top: 90rpx;image{height: 60rpx;}
}.box{width: 680rpx;margin: 0 auto;margin-top: 330rpx;.awards{width: 525rpx;height: 525rpx;margin: 0 auto;display: flex;flex-wrap: wrap;justify-content: space-between;align-content:space-between;.awardsItem{width: 161rpx;height: 161rpx;background: linear-gradient(132deg, #FFCEA4 0%, #FFE6CB 100%);box-shadow: 0rpx 6rpx 0rpx 0rpx #E98F5D;border-radius: 15rpx;display: flex;flex-direction: column;align-items: center;justify-content: center;cursor: pointer;image{width: 132rpx;height: 132rpx;border-radius: 12rpx;}.play{display: flex;flex-direction: column;align-items: center;justify-content: center;.go{font-size: 68rpx;font-family: PingFangSC-Semibold, PingFang SC;font-weight: 600;color: #A10B14;}.count{font-size: 24rpx;font-family: PingFangSC-Regular, PingFang SC;font-weight: 400;color: #A10B14;}}}.awardsActive{background: linear-gradient(132deg, #FFECBB 0%, #FFB100 100%);box-shadow: 0rpx 6rpx 0rpx 0rpx #E38800, inset 0rpx 2rpx 6rpx 0rpx rgba(255,255,255,0.65), inset 0rpx -2rpx 6rpx 0rpx rgba(255,255,255,0.3);}}.notification{height: 40rpx;margin-top: 226rpx;display: flex;justify-content: center;align-items: center;image{height: 32rpx;margin-right: 16rpx;}text{font-size: 28rpx;font-family: PingFangSC-Regular, PingFang SC;font-weight: 400;color: #FF8D3B;}}.btns{display: flex;align-items: center;justify-content: space-between;margin-top: 38rpx;}.btn{width: 332rpx;height: 110rpx;image{width: 100%;height: 100%;}}}.win{width: 750rpx;height: 100vh;background: rgba(0, 0, 0, 0.8);position: fixed;top: 0;left: 0;z-index: 2;display: flex;flex-direction: column;align-items: center;justify-content: center;
}.win_box{width: 662rpx;height: 60%;padding: 40rpx;box-sizing: border-box;border-radius: 24rpx;
}.win_box_bg{background: #FFCE2B;
}.bg3{background: #C3E5FE;
}.iconcolseIcon{font-size: 58rpx;margin-top: 98rpx;
}.win_box1{width: 630rpx;height: 922rpx;position: relative;
}.win_bg{width: 630rpx;height: 922rpx;
}.win_content{width: 630rpx;height: 922rpx;position: absolute;left: 0;top: 0;display: flex;flex-direction: column;align-items: center;
}.win_tips{font-size: 48rpx;font-family: SourceHanSansSC-Medium, SourceHanSansSC;font-weight: bold;margin-top: 290rpx;
}.win_title{font-size: 48rpx;font-family: SourceHanSansSC-Medium, SourceHanSansSC;font-weight: bold;color: #FE6631;margin: 170rpx 0;
}.win_btn{width: 280rpx;height: 80rpx;line-height: 80rpx;text-align: center;background: #FFE047;border-radius: 46rpx;font-size: 32rpx;font-family: SourceHanSansSC-Medium, SourceHanSansSC;font-weight: bold;color: #13112C;
}.win_tit{font-size: 48rpx;font-family: SourceHanSansSC-Medium, SourceHanSansSC;font-weight: bold;margin-bottom: 32rpx;
}.win_box2{width: 662rpx;height: 900rpx;background: #FFFFFF;border-radius: 24rpx;display: flex;flex-direction: column;
}.items{width: 662rpx;height: 108rpx;background: #C3E5FE;border-radius: 24rpx 24rpx 0rpx 0rpx;display: flex;align-items: center;flex-shrink:0
}.left,.right{width: 50%;text-align: center;font-family: SourceHanSansSC-Medium, SourceHanSansSC;font-weight: bold;
}.i_title{font-size: 36rpx;
}.list{height: 792rpx;padding-bottom: 20rpx;overflow: hidden;
}.item{width: 662rpx;height: 88rpx;display: flex;align-items: center;justify-content: space-around;
}.item:nth-child(2n){background-color: #F4F4F4;
}.r_btn{width: 160rpx;height: 60rpx;line-height: 60rpx;text-align: center;background: #FFC659;border-radius: 46rpx;font-family: SourceHanSansSC-Medium, SourceHanSansSC;font-weight: bold;font-size: 32rpx;margin:0 auto;
}

效果: