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随机抽奖转盘微信小程序项目源码
2022-07-29 08:05:00 【叶绿体不忘呼吸】
微信小程序:创享日记
发送:抽奖转盘
获取完整源码(微信开发者工具打开即可用)

可以容易自行修改,融入自己的项目里面。
function formatTime(date) {
var year = date.getFullYear()
var month = date.getMonth() + 1
var day = date.getDate()
var hour = date.getHours()
var minute = date.getMinutes()
var second = date.getSeconds()
return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
}
function formatNumber(n) {
n = n.toString()
return n[1] ? n : '0' + n
}
module.exports = {
formatTime: formatTime
}
<!--index.wxml-->
<view class="container-out">
<view class="circle" wx:for="{
{circleList}}" style="top:{
{
item.topCircle}}rpx;left:{
{
item.leftCircle}}rpx;background-color: {
{
(index%2==0)?colorCircleFirst:colorCircleSecond}};"></view>
<view class="container-in">
<view class="content-out" wx:for="{
{awardList}}" style="top:{
{
item.topAward}}rpx;left:{
{
item.leftAward}}rpx;background-color: {
{
(index==indexSelect)?colorAwardSelect:colorAwardDefault}};">
<image class="award-image" src="{
{item.imageAward}}"></image>
</view>
<view class="start-btn" bindtap="startGame" style=" background-color:{
{isRunning?'#e7930a':'#ffe400'}}">START</view>
</view>
</view>
概率,亦称“或然率”,它是反映随机事件出现的可能性大小。随机事件是指在相同条件下,可能出现也可能不出现的事件。例如,从一批有正品和次品的商品中,随意抽取一件,“抽得的是正品”就是一个随机事件。设对某一随机现象进行了n次试验与观察,其中A事件出现了m次,即其出现的频率为m/n。经过大量反复试验,常有m/n越来越接近于某个确定的常数(此论断证明详见伯努利大数定律)。该常数即为事件A出现的概率,常用P (A) 表示。
第一个系统地推算概率的人是16世纪的卡尔达诺。记载在他的著作《Liber de Ludo Aleae》中。书中关于概率的内容是由Gould从拉丁文翻译出来的。
卡尔达诺的数学著作中有很多给赌徒的建议。这些建议都写成短文。然而,首次提出系统研究概率的是在帕斯卡和费马来往的一系列信件中。这些通信最初是由帕斯卡提出的,他想找费马请教几个关于由Chevvalier de Mere提出的问题。Chevvalier de Mere是一知名作家,路易十四宫廷的显要,也是一名狂热的赌徒。问题主要是两个:掷骰子问题和比赛奖金分配问题。
概率是度量偶然事件发生可能性的数值。假如经过多次重复试验(用X代表),偶然事件(用A代表)出现了若干次(用Y代表)。以X作分母,Y作分子,形成了数值(用P代表)。在多次试验中,P相对稳定在某一数值上,P就称为A出现的概率。如偶然事件的概率是通过长期观察或大量重复试验来确定,则这种概率为统计概率或经验概率。
研究支配偶然事件的内在规律的学科叫概率论。属于数学上的一个分支。概率论揭示了偶然现象所包含的内部规律的表现形式。所以,概率,对人们认识自然现象和社会现象有重要的作用。比如,社会产品在分配给个人消费以前要进行扣除,需扣除多少,积累应在国民收入中占多大比重等,就需要运用概率论来确定。
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