本篇文章主要介绍了微信小程序开发之大转盘 仿天猫超市抽奖实例，这里整理了详细的代码,具有一定的参考价值，感兴趣的小伙伴们可以参考一下。
天猫超市翻牌的转盘经常用,以前做Android,没啥想法,现在尝试微信小程序,看到别人家APP里有啥好玩的,就想去做一个.
上GIF看效果:
简要的说一下.
1.外面一圈闪烁的小球是用js控制的样式.500ms改变一次样式.简单粗暴;
2.抽奖的item也是js控制背景,但是怎么样让它优雅的停下来是个问题.动画中有timingFunction可以设置速度.自己用js就没那么简单了.我这里用setInterval(),时间是线性变化的.换个斜率先小后大的函数效果应该会好一些.
注释写了一些,凑合这看吧.有不对的地方,
欢迎批评!
上代码:
1.index.wxml
START
2.index.wxss
.container-out { height: 600rpx; width: 650rpx; background-color: #b136b9; margin: 100rpx auto; border-radius: 40rpx; box-shadow: 0 10px 0 #871a8e; position: relative; } .container-in { width: 580rpx; height: 530rpx; background-color: #871a8e; border-radius: 40rpx; position: absolute; left: 0; right: 0; top: 0; bottom: 0; margin: auto; } /**小圆球 box-shadow: inset 3px 3px 3px #fff2af;*/ .circle { position: absolute; display: block; border-radius: 50%; height: 20rpx; width: 20rpx; } .content-out { position: absolute; height: 150rpx; width: 166.6666rpx; background-color: #f5f0fc; border-radius: 15rpx; box-shadow: 0 5px 0 #d87fde; } /**居中 加粗*/ .start-btn { position: absolute; margin: auto; top: 0; left: 0; bottom: 0; right: 0; border-radius: 15rpx; height: 150rpx; width: 166.6666rpx; background-color: #ffe400; box-shadow: 0 5px 0 #e7930a; color: #f6251e; text-align: center; font-size: 55rpx; font-weight: bolder; line-height: 150rpx; } .award-image { position: absolute; margin: auto; top: 0; left: 0; bottom: 0; right: 0; height: 140rpx; width: 130rpx; }
3.index.js
Page({ data: { circleList: [],//圆点数组 awardList: [],//奖品数组 colorCircleFirst: '#FFDF2F',//圆点颜色1 colorCircleSecond: '#FE4D32',//圆点颜色2 colorAwardDefault: '#F5F0FC',//奖品默认颜色 colorAwardSelect: '#ffe400',//奖品选中颜色 indexSelect: 0,//被选中的奖品index isRunning: false,//是否正在抽奖 imageAward: [ '../../images/1.jpg-600', '../../images/2.jpg-600', '../../images/3.jpg-600', '../../images/4.jpg-600', '../../images/5.jpg-600', '../../images/6.jpg-600', '../../images/7.jpg-600', '../../images/8.jpg-600', ],//奖品图片数组 }, onLoad: function () { var _this = this; //圆点设置 var leftCircle = 7.5; var topCircle = 7.5; var circleList = []; for (var i = 0; i <24; i++) { if (i == 0) { topCircle = 15; leftCircle = 15; } else if (i <6) { topCircle = 7.5; leftCircle = leftCircle + 102.5; } else if (i == 6) { topCircle = 15 leftCircle = 620; } else if (i <12) { topCircle = topCircle + 94; leftCircle = 620; } else if (i == 12) { topCircle = 565; leftCircle = 620; } else if (i <18) { topCircle = 570; leftCircle = leftCircle - 102.5; } else if (i == 18) { topCircle = 565; leftCircle = 15; } else if (i <24) { topCircle = topCircle - 94; leftCircle = 7.5; } else { return } circleList.push({ topCircle: topCircle, leftCircle: leftCircle }); } this.setData({ circleList: circleList }) //圆点闪烁 setInterval(function () { if (_this.data.colorCircleFirst == '#FFDF2F') { _this.setData({ colorCircleFirst: '#FE4D32', colorCircleSecond: '#FFDF2F', }) } else { _this.setData({ colorCircleFirst: '#FFDF2F', colorCircleSecond: '#FE4D32', }) } }, 500) //奖品item设置 var awardList = []; //间距,怎么顺眼怎么设置吧. var topAward = 25; var leftAward = 25; for (var j = 0; j <8; j++) { if (j == 0) { topAward = 25; leftAward = 25; } else if (j <3) { topAward = topAward; //166.6666是宽.15是间距.下同 leftAward = leftAward + 166.6666 + 15; } else if (j <5) { leftAward = leftAward; //150是高,15是间距,下同 topAward = topAward + 150 + 15; } else if (j <7) { leftAward = leftAward - 166.6666 - 15; topAward = topAward; } else if (j 1000) { //去除循环 clearInterval(timer) //获奖提示 wx.showModal({ title: '恭喜您', content: '获得了第' + (_this.data.indexSelect + 1) + "个优惠券", showCancel: false,//去掉取消按钮 success: function (res) { if (res.confirm) { _this.setData({ isRunning: false }) } } }) } indexSelect = indexSelect % 8; _this.setData({ indexSelect: indexSelect }) }, (200 + i)) } })
demo代码下载
demo
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