这篇文章主要为大家展示了小程序如何实现抽奖动画，内容简而易懂，希望大家可以学习一下，学习完之后肯定会有收获的，下面让小编带大家一起来看看吧。

所有的抽奖都是由后台计算后得到的，前台只做动画展示

<view class='top-banner center'> <!-- 轮播展示中奖信息区域 --> <swiper autoplay="{{true}}" interval="{{1500}}" circular="{{true}}" vertical='{{true}}'> <block wx:for="{{prizeInfo}}" wx:key="index"> <swiper-item> <view>{{item.name}}{{item.prize}}</view> </swiper-item> </block> </swiper></view><!-- 轮播结束 抽奖转盘 --><view class='turntable' bindtap='doLottery'> <image class='turntable-bj' src='../../../img/turntable.png'></image> <image class='arrow' src='../../../img/arrow.png'> </image></view>

js:

const app = getApp();var index = { data:{ prizeInfo:[ { name:'qiphon', prize:'5元' }, { name:'qiphon23423', prize:'53元' }, { name:'qipsdfhon', prize:'35元' } ], transformDeg:0, // 旋转角度 transition:'all 3s cubic-bezier(0.005, 1.340, 1.000, 0.865)', time:'999s' }, onLoad(opt){ console.log(opt) }, onReady(){ this.animation = wx.createAnimation({ timingFunction:'esse-in-out', duration:2000 }); this.animationDeg = 360; }, loadCoupons(){ // 加载获奖信息 }, doLottery(){ // 抽奖 var _this = this; if(this.aniRotate)return; this.aniRotate = true; this.setData({ transformDeg:this.data.transformDeg + 360*900, time:'100s ease' }) setTimeout(function(){ console.log('请求完成'+_this.data.transformDeg) // setTimeout 模拟ajax请求 _this.setData({ transformDeg:-360*4, time:'3s ease' }) setTimeout(function(){ console.log('返回结果'+_this.data.transformDeg) _this.setData({ transformDeg:360*2 + 0, time:'6s cubic-bezier(0.000, 0.765, 0.000, 0.955)' }) setTimeout(function(){ _this.aniRotate = false; wx.showModal({ title:'中奖信息', content:'恭喜获得奖品' }) },6000) },2000) },3000) },}Page(index);

css:

.top-banner{ background: #fff; padding:20rpx;}.top-banner swiper{ height: 50rpx; line-height: 50rpx;}/* 转盘 */.turntable{ position: relative; width: 100%; height: 530rpx;}.turntable-bj{ display: block; margin:0 auto; width:600rpx; height: 530rpx;}.turntable .arrow{ position: absolute; top:0; right:0; left:0; bottom:110rpx; margin:auto; width:93.5rpx; height: 212rpx;}

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