微信小程序開發(fā)之大轉(zhuǎn)盤仿天貓超市抽獎實(shí)例

更新時(shí)間：2016年12月08日 14:28:32 作者：dzp_coder

本篇文章主要介紹了微信小程序開發(fā)之大轉(zhuǎn)盤仿天貓超市抽獎實(shí)例，這里整理了詳細(xì)的代碼,具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下。

天貓超市翻牌的轉(zhuǎn)盤經(jīng)常用,以前做Android,沒啥想法,現(xiàn)在嘗試微信小程序,看到別人家APP里有啥好玩的,就想去做一個(gè).

上GIF看效果:

簡要的說一下.

1.外面一圈閃爍的小球是用js控制的樣式.500ms改變一次樣式.簡單粗暴;

2.抽獎的item也是js控制背景,但是怎么樣讓它優(yōu)雅的停下來是個(gè)問題.動畫中有timingFunction可以設(shè)置速度.自己用js就沒那么簡單了.我這里用setInterval(),時(shí)間是線性變化的.換個(gè)斜率先小后大的函數(shù)效果應(yīng)該會好一些.

注釋寫了一些,湊合這看吧.有不對的地方,

歡迎批評!

上代碼:
1.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>

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;
}

/**小圓球
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: [],//圓點(diǎn)數(shù)組
  awardList: [],//獎品數(shù)組
  colorCircleFirst: '#FFDF2F',//圓點(diǎn)顏色1
  colorCircleSecond: '#FE4D32',//圓點(diǎn)顏色2
  colorAwardDefault: '#F5F0FC',//獎品默認(rèn)顏色
  colorAwardSelect: '#ffe400',//獎品選中顏色
  indexSelect: 0,//被選中的獎品index
  isRunning: false,//是否正在抽獎
  imageAward: [
   '../../images/1.jpg',
   '../../images/2.jpg',
   '../../images/3.jpg',
   '../../images/4.jpg',
   '../../images/5.jpg',
   '../../images/6.jpg',
   '../../images/7.jpg',
   '../../images/8.jpg',
  ],//獎品圖片數(shù)組
 },

 onLoad: function () {
  var _this = this;
  //圓點(diǎn)設(shè)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
  })
  //圓點(diǎn)閃爍
  setInterval(function () {
   if (_this.data.colorCircleFirst == '#FFDF2F') {
    _this.setData({
     colorCircleFirst: '#FE4D32',
     colorCircleSecond: '#FFDF2F',
    })
   } else {
    _this.setData({
     colorCircleFirst: '#FFDF2F',
     colorCircleSecond: '#FE4D32',
    })
   }
  }, 500)
  //獎品item設(shè)置
  var awardList = [];
  //間距,怎么順眼怎么設(shè)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是寬.15是間距.下同
    leftAward = leftAward + 166.6666 + 15;
   } else if (j < 5) {
    leftAward = leftAward;
    //150是高,15是間距,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
  })
 },
 //開始游戲
 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++;
   //這里我只是簡單粗暴用y=30*x+200函數(shù)做的處理.可根據(jù)自己的需求改變轉(zhuǎn)盤速度
   i += 30;
   if (i > 1000) {
    //去除循環(huán)
    clearInterval(timer)
    //獲獎提示

    wx.showModal({
     title: '恭喜您',
     content: '獲得了第' + (_this.data.indexSelect + 1) + "個(gè)優(yōu)惠券",
     showCancel: false,//去掉取消按鈕
     success: function (res) {
      if (res.confirm) {
       _this.setData({
        isRunning: false
       })
      }
     }
    })
   }
   indexSelect = indexSelect % 8;
   _this.setData({
    indexSelect: indexSelect
   })
  }, (200 + i))
 }
})

demo代碼下載

demo

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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