html5仿淘寶,京東實(shí)現(xiàn)紅包雨效果的方法

html5仿淘寶,京東實(shí)現(xiàn)紅包雨效果的方法？這個(gè)問(wèn)題可能是我們?nèi)粘W(xué)習(xí)或工作經(jīng)常見(jiàn)到的。希望通過(guò)這個(gè)問(wèn)題能讓你收獲頗深。下面是小編給大家?guī)?lái)的參考內(nèi)容，讓我們一起來(lái)看看吧！

1. 效果展示

圖片依次是倒計(jì)時(shí)頁(yè)面,搶紅包頁(yè)面,拆紅包頁(yè),紅包展示頁(yè),這些頁(yè)面都是寫(xiě)在一個(gè)canvas里面的,無(wú)刷新的切換效果,性能超級(jí)棒

2.代碼展示

貼上主要的代碼js代碼和注釋

  
  //初始化圖片
  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 = ['全場(chǎng)優(yōu)惠50元', '20元代金券', '全場(chǎng)優(yōu)惠50元', '20元代金券', '全場(chǎng)優(yōu)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;
  }

  //初始化紅包
  function QingLv(config, game){
    this.init = function(){
        this.config = config;
        QingLvGroup = game.add.group();
        QingLvGroup.enableBody = true;
        QingLvGroup.createMultiple(config.selfPool, config.selfPic); //初始化多個(gè)紅包
        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)  //紅包生成的位置
            e.body.velocity.x = game.rnd.integerInRange(-300, -150);   //紅包移動(dòng)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();
          
          //點(diǎn)擊獲得紅包,游戲暫停
          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 = ''
          
          //拆紅包
          let clickOpen = function() {

            //游戲暫停時(shí),點(diǎn)擊事件無(wú)效,只能通過(guò)這種畫(huà)熱點(diǎn)的形式來(lái)綁定事件
            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

              //拆紅包動(dòng)畫(huà)
              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    //文字相對(duì)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.killed, this, sprite);
    };
    this.killed = function(sprite){
        sprite.kill();
    }
  }
  states.boot = function(game) {
    this.preload = function() {
        if (typeof(GAME) !== "undefined") {
            this.load.baseURL = GAME + "/";
        }
        if (!game.device.desktop) {
            this.scale.scaleMode = Phaser.ScaleManager.EXACT_FIT;
            this.scale.forcePortrait = true;
            this.scale.refresh();
        }
    };
    this.create = function() {
        game.stage.backgroundColor = '#FFF';
        game.state.start('preload');
    };
  };
  states.preload = function(game) {
      this.preload = function(game) {
          //加載圖片
          game.load.spritesheet('daojishi', imgjishi, 250,120, 4)
          game.load.image('bgPlan', bgPlan)
          game.load.image('bgRainer', bgRainer)
          game.load.spritesheet('redpacket', redpacket, 144, 173, 2)
          game.load.image('close', close)
          game.load.image('dialogExit', dialogExit)
          game.load.image('buttonExit', buttonExit)
          game.load.image('buttonCancel', buttonCancel)
          game.load.image('openRedpacket', openRedpacket)
          game.load.image('open', open)
          game.load.image('redpacketResult', redpacketResult)
          game.load.image('buttonContinue', buttonContinue)
          game.load.image('buttonUseTicket', buttonUseTicket)
          game.load.spritesheet('cursorAnimation', cursorAnimation, 74, 108, 2)
      };
      this.create = function() {
          game.state.start('main');
      };
  };
  states.main = function(game) {
      this.create = function() {
          // 物理系統(tǒng)
          game.physics.startSystem(Phaser.Physics.ARCADE);

          // 背景圖
          var bgPlan = game.add.sprite(0, 0, 'bgPlan');
          bgPlan.width = game.width;
          bgPlan.height = game.height;

          var cursorPointer = game.add.sprite(game.world.centerX - 36, game.world.centerY + 86, 'cursorAnimation');
          var anim = cursorPointer.animations.add('cursorAnimation');
          cursorPointer.play('cursorAnimation', 2, true);

          document.getElementById('audioCountDown').play()

          // 開(kāi)始游戲倒計(jì)時(shí)
          var daojishi = game.add.sprite(game.world.centerX - 140, game.world.centerY - 400, 'daojishi');
          var anim = daojishi.animations.add('daojishi');
          daojishi.play('daojishi', 1, false);
          anim.onComplete.add(this.startGame, this, daojishi);
      };
      
      this.startGame = function(daojishi){
          this.leftTime = time
          let bgRainer = game.add.sprite(0, 0, 'bgRainer');
          bgRainer.width = game.width;
          bgRainer.height = game.height;
          daojishi.visible = false;
          this.createQingLv();

          //添加按鈕,并綁定事件
          let closeImg = game.add.button(rfuc(20), rfuc(20), 'close', function(){
            game.paused = true
            pausedMask.visible = true
            exitDialog.visible = true
            exitButton.visible = true
            cancelButton.visible = true

            game.input.onDown.add(buttonClick, this)
          }.bind(this))
          
          // 剩余時(shí)間
          this.leftTimeText = game.add.text(0, 0, this.leftTime, {fill: '#FFF', fontSize: '40px', fontWeight: 'bolder'})
          this.leftTimeText.scale.setTo(rfuc(1))
          this.leftTimeText.fixedToCamera = true;
          this.leftTimeText.cameraOffset.setTo(game.camera.width - rfuc(80), rfuc(20));

          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())
          pausedMask.visible = false;

          let exitDialog = game.add.sprite(rfuc(62), rfuc(150), 'dialogExit')
          exitDialog.visible = false;

          let exitButton = game.add.button(rfuc(80), rfuc(315), 'buttonExit')
          exitButton.visible = false;

          let isExit = false
          let cancelButton = game.add.button(rfuc(200), rfuc(315), 'buttonCancel')
          cancelButton.visible = false;

          game.time.events.repeat(Phaser.Timer.SECOND, this.leftTime, this.refreshTime, this)

          let buttonClick = function() {
            let cancelRect = new Phaser.Rectangle(rfuc(200), rfuc(315), 194, 66).copyFrom(cancelButton);
            if (cancelRect.contains(game.input.x, game.input.y)) {
              game.input.onDown.remove(buttonClick, this)
              game.paused = false
              pausedMask.visible = false
              exitDialog.visible = false
              exitButton.visible = false
              cancelButton.visible = false
            }
          }
      };

      this.createQingLv = function(){
          this.qinglv = new QingLv(config, game);
          this.qinglv.init();
          this.qinglv = new QingLv(config, game);
          this.qinglv.init();
      };
      
      this.refreshTime = function(){
          this.leftTime--;
          var tem = this.leftTime;
          this.leftTimeText.text = tem;
          if(this.leftTime === 0) {
              game.paused = true;
          }
      }
  };

  //生成游戲
  let game = null
  if (game == null) {
    game = new Phaser.Game(document.documentElement.clientWidth, document.documentElement.clientHeight + 2, Phaser.AUTO, document.getElementById('gameScreen'));
    game.state.add('boot', states.boot.bind(game));
    game.state.add('preload', states.preload.bind(game));
    game.state.add('main', states.main.bind(game));
    game.state.start('boot');
  }

3. 疑難問(wèn)題

1. 游戲暫停時(shí),點(diǎn)擊事件無(wú)效,需要點(diǎn)擊,怎么解決

答:  通過(guò)全局事件畫(huà)熱點(diǎn)的形式綁定事件,一定要記得移除事件,一定一定要記得

game.input.onDown.add(clickOpen, this)   //給游戲綁定全局事件

let userTicket = game.add.sprite(rfuc(78), rfuc(445), 'buttonUseTicket')        
let userTicketRect = new Phaser.Rectangle(78, 445, 194, 66).copyFrom(userTicket);  //獲得button的區(qū)域

//如果點(diǎn)擊的位置為button的位置就執(zhí)行下一步
if (userTicketRect.contains(game.input.x, game.input.y)) {
　　//移除全局事件
   game.input.onDown.remove(clickButton, this);
}

2. 文字或圖片相對(duì)于屏幕居中(暫時(shí)只能做屏幕居中)

答: 添加文字到游戲中,文字向左的偏移量等于游戲屏幕的寬度減去文字寬度的一般,就能達(dá)到居中的效果

ticketText = game.add.text(0, rfuc(338), '我想居中', 
{fill: '#ffe67d', fontSize: '46px', fontWeight: 'bolder'})
ticketText.left = game.world.centerX - ticketText.width / 2    //文字相對(duì)于屏幕左右居中

感謝各位的閱讀！看完上述內(nèi)容，你們對(duì)html5仿淘寶,京東實(shí)現(xiàn)紅包雨效果的方法大概了解了嗎？希望文章內(nèi)容對(duì)大家有所幫助。如果想了解更多相關(guān)文章內(nèi)容，歡迎關(guān)注億速云行業(yè)資訊頻道。