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微信小程序开发之大转盘 仿天猫超市抽奖实例，
前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。
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
2.index.wxss
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
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 < 8) {
leftAward = leftAward;
topAward = topAward - 150 - 15;
}
var imageAward = this.data.imageAward[j];
awardList.push({ topAward: topAward,leftAward: leftAward,imageAward: imageAward });
}
this.setData({
awardList: awardList
})
},//开始游戏
startGame: function () {
if (this.data.isRunning) return
this.setData({
isRunning: true
})
var _this = this;
var indexSelect = 0
var i = 0;
var timer = setInterval(function () {
indexSelect++;
//这里我只是简单粗暴用y=30*x+200函数做的处理.可根据自己的需求改变转盘速度
i += 30;
if (i > 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
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程之家。
原文链接：https://www.f2er.com/weapp/43750.html
