用微信小程序开发的Canvas绘制可配置的转盘抽奖。
Home Page: https://blog.givebest.cn/GB-canvas-turntable.html
License: MIT License
用微信小程序开发的Canvas绘制可配置的转盘抽奖。
使用https://github.com/givebest/GB-canvas-turntable代码移植过而来。
微信小程序感觉是个半成品，代码移植过程比较繁琐麻烦。canvas API 部分都被重写了。。。
canvas z-index不生效，永远在最上层，不支持rotate动画。
纯CSS实现起来还是比较麻烦的。
可以使用canvas描绘好的图，生成一张临时图片。
canvas标签用定位移除可视范围。
还有你用的canvas API有一些准备移除了。
以下这些小程序准备移除
wx.createContext
wx.drawCanvas
getLottery: function () {
var that = this
var awardIndex = Math.random() * awardLength >>> 0;
// 获取奖品配置
var awardsConfig = app.awardsConfig,
runNum = awardLength+2
if (awardIndex < 2) awardsConfig.chance = false
console.log(awardIndex)
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