html5仿淘宝,京东实现红包雨效果（代码实例）

本篇文章就给大家分享html5仿淘宝,京东实现红包雨效果的实例代码。有一定的参考价值，有需要的朋友可以参考一下，希望对你们有所帮助。

本红包雨项目是基于HTML5的游戏框架Phaser写的,最终形成的是一个canvas,所以性能很好,但是必须要说的是这个框架比较大,压缩后也有700K左右,所以请慎用.

代码地址: https://github.com/AmosXu/red-packet-rain

1. 效果展示

图片依次是倒计时页面,抢红包页面,拆红包页,红包展示页,这些页面都是写在一个canvas里面的,无刷新的切换效果,性能超级棒

2.代码展示

贴上主要的代码js代码和注释

  
  //初始化图片
  let imgjishi = 'assets/img/daojishi.png'
  let bgPlan = 'assets/img/bg-plan.jpg'
  let bgRainer = 'assets/img/bg-rainer.jpg'
  let redpacket = 'assets/img/redpacket.png'
  let close = 'assets/img/close.png'
  let dialogExit = 'assets/img/dialog-exit.png'
  let buttonCancel = 'assets/img/button-cancel.png'
  let buttonExit = 'assets/img/button-exit.png'
  let openRedpacket = 'assets/img/open-redpacket.png'
  let open = 'assets/img/open.png'
  let redpacketResult = 'assets/img/redpacket-result.png'
  let buttonUseTicket = 'assets/img/button-use-ticket.png'
  let buttonContinue = 'assets/img/button-continue.png'
  let cursorAnimation = 'assets/img/cursor-animation.png'

  let states = {}
  let QingLvGroup;
  let hitNum = 0;
  let config = {
      selfPool:40,
      selfPic:'redpacket',
      rate:0.5,
      maxSpeed:1200,
      minSpeed:400,
      max:95
  }

  let ids = [0, 1, 2, 3, 4, 5]
  let redpackets = ['全场优惠50元', '20元代金券', '全场优惠50元', '20元代金券', '全场优惠50元', '20元代金券']
  let time = 25;
  let getIds = []
  let radio = document.documentElement.clientWidth/375;
  let e;

  function rfuc(n){
    return n*radio;
  }

  //初始化红包
  function QingLv(config, game){
    this.init = function(){
        this.config = config;
        QingLvGroup = game.add.group();
        QingLvGroup.enableBody = true;
        QingLvGroup.createMultiple(config.selfPool, config.selfPic); //初始化多个红包
        QingLvGroup.setAll('anchor.y',1)
        QingLvGroup.setAll('outOfBoundsKill', true);
        QingLvGroup.setAll('checkWorldBounds', true);
        this.maxWidth = game.width + 300;

        game.time.events.loop(Phaser.Timer.SECOND * config.rate, this.createQL, this);
    };
    this.createQL = function(){
        e = QingLvGroup.getFirstExists(false);
        
        if(e) {
            if(hitNum >= config.max) {
                return;
            }
            hitNum++;
            e.events.onInputDown.removeAll();
            var ram= Math.random();
            ram =ram<0.5?ram+=0.5: ram;
            e.loadTexture(this.config.selfPic)
            e.alpha = 1;
            e.angle = 30
            // e.scale.setTo(rfuc(ram));
            e.reset(game.rnd.integerInRange(100, this.maxWidth), 100)  //红包生成的位置
            e.body.velocity.x = game.rnd.integerInRange(-300, -150);   //红包移动的速度
            e.body.velocity.y = game.rnd.integerInRange(config.minSpeed, config.maxSpeed);
            e.inputEnabled = true;
            e.events.onInputDown.add(this.hitted, this)
        }
    };
    this.hitted = function(sprite){
        if(Math.random() < 1/4 && ids.length > 0) {
          sprite.kill();
          
          //点击获得红包,游戏暂停
          game.paused = true;

          //背景
          let hexGraphics = new Phaser.Graphics().beginFill(0x000000, 0.5).drawRect(0,0,document.documentElement.clientWidth,document.documentElement.clientHeight + 2);
          let pausedMask = game.add.sprite(0, 0, hexGraphics.generateTexture())
          
          let openDialog = game.add.sprite(rfuc(62), rfuc(150), 'openRedpacket')
          
          let open = game.add.sprite(rfuc(130), rfuc(300), 'open')
          open.inputEnabled = true;
        
          let result = game.add.sprite(rfuc(0), rfuc(120), 'redpacketResult')
          result.visible = false

          let userTicket = game.add.sprite(rfuc(78), rfuc(445), 'buttonUseTicket')
          userTicket.visible = false

          let goOn = game.add.sprite(rfuc(198), rfuc(445), 'buttonContinue')
          goOn.visible = false

          let ticketText = {};
          let link = ''
          
          //拆红包
          let clickOpen = function() {

            //游戏暂停时,点击事件无效,只能通过这种画热点的形式来绑定事件
            let openRect = new Phaser.Rectangle(rfuc(130), rfuc(315), 239, 239).copyFrom(open);

            if (openRect.contains(game.input.x, game.input.y)) {
              let currentWidth = open.width

              //拆红包动画
              let tempArr = [2, 4, 8, 4, 2, 1]
              let index = 0;
              let timer = setInterval(function() {
                if (index > tempArr.length-1) { index = 0 }
                open.width = currentWidth / tempArr[index]
                open.height = open.height
                open.left = game.world.centerX - open.width / 2
                ++index
              }, 200)
              game.input.onDown.remove(clickOpen, this);
              let arrIndex = Math.floor(Math.random() * ids.length)
              let redpacketId = ids.splice(arrIndex, 1)
              getIds.push(redpacketId[0])

              setTimeout(()=> {
                timer && clearInterval(timer)
                document.getElementById('audioOpen').play()
                let text = redpackets[redpacketId[0]]
                ticketText=game.add.text(0, rfuc(338),text,{fill:'#ffe67d',fontSize:'46px',fontWeight: 'bolder'})
                ticketText.left = game.world.centerX - ticketText.width / 2    //文字相对于屏幕左右居中
                openDialog.visible = false
                open.visible = false
                result.visible = true
                userTicket.visible = true
                goOn.visible = true
                game.input.onDown.add(clickButton, this)
              }, 1000)
            } 
          };

          let clickButton = function() {
            let userTicketRect = new Phaser.Rectangle(rfuc(78), rfuc(445), 194, 66).copyFrom(userTicket);
            let continueRect = new Phaser.Rectangle(rfuc(198), rfuc(445), 194, 66).copyFrom(goOn);

            if (userTicketRect.contains(game.input.x, game.input.y)) {
              window.location.replace(link)
              game.input.onDown.remove(clickButton, this);

            } else if (continueRect.contains(game.input.x, game.input.y)) {
              result.visible = false
              userTicket.visible = false
              goOn.visible = false
              pausedMask.visible = false
              ticketText.visible = false
              game.paused = false
              game.input.onDown.remove(clickButton, this);
            }
          }

          game.input.onDown.add(clickOpen, this)
        } else {
          sprite.inputEnabled = false;
          var anim = sprite.animations.add(config.selfPic);
          sprite.play(config.selfPic, 40, false);
          anim.onComplete.add(this.fade, this, sprite)  
        }
    };
    this.fade = function(sprite){
        var tween = game.add.tween(sprite).to({alpha:0}, 300, 'Linear', true)
        tween.onComplete.add(this