cocosCreator | 实例-制作抽奖池

[预览效果](https://saber2pr.github.io/MyWeb/build/RandPlat/build/web-mobile)

先看看层级结构

 

 

给guide节点添加3个动画clip

首先是rotationStart旋转开始

添加rotation属性

设置两个关键帧，rotation=45、rotation=405，

拖动红线到一个位置，改变节点rotation属性，即可设置关键帧。

下面，sample为帧数、speed为播放速度、WrapMode为播放模式，normal为正常、loop为循环等

然后设置缓动作

选择Ease In Sine

然后类似的做剩下的动画，

rotating、rotationFinish （其中rotating不需要缓动作但需要WrapMode为loop循环，rotationFinish需要Ease Out Sine）

 

random是这个抽奖池的根节点，给它挂上脚本组件

然后编写脚本RandPlat.js

 先设置一些属性接口

    cc.Class({
        extends: cc.Component,
     
        properties: {
            //奖品数组
            gifts: {
                //默认类型为数组
                default: [],
                //元素类型为cc.Sprite类型
                type: [cc.Sprite]
            },
            //guide旋转盘节点
            plat:cc.Node,
            //转盘上的点击抽奖字样Label
            inforLabel:cc.Label,
            //旁边显示当前序号的Layout
            resultLayout:cc.Node,
        },
    })
     
    ​
     
    ​

拖入相应节点

然后在onload里初始化一些需要的值

    cc.Class({
        extends: cc.Component,
     
        properties: {
            gifts: {
                default: [],
                type: [cc.Sprite]
            },
            plat:cc.Node,
            inforLabel:cc.Label,
            resultLayout:cc.Node,
        },
        
        //添加几个需要间接利用的属性
        originRota:null,
        animPlay:null,
        giftOrder:null,
        resultLabel:null,
        lastAngle:null,
        
        onLoad () {
            //记录转盘初始角度
            this.originRota = this.plat.rotation
            //记录转盘节点的动画组件
            this.animPlay = this.plat.getComponent(cc.Animation)
            //记录序号表节点上的序号Label
            this.resultLabel = this.resultLayout.getChildByName('result').getComponent(cc.Label)
            //初始化最后一次旋转角（下面会用到）
            this.lastAngle = this.originRota
        },
    })

然后给转盘plat添加点击事件

    cc.Class({
        extends: cc.Component,
     
        properties: {
            gifts: {
                default: [],
                type: [cc.Sprite]
            },
            plat:cc.Node,
            inforLabel:cc.Label,
            resultLayout:cc.Node,
        },
     
        originRota:null,
        animPlay:null,
        giftOrder:null,
        resultLabel:null,
        lastAngle:null,
     
        onLoad () {
            this.originRota = this.plat.rotation
            this.animPlay = this.plat.getComponent(cc.Animation)
            this.resultLabel = this.resultLayout.getChildByName('result').getComponent(cc.Label)
            this.lastAngle = this.originRota
        },
     
        start () {
            //当点击时
            this.plat.on("touchstart", function(){
                cc.log('click')
                //开始播放旋转动画
                this.startPlay()
            }, this)
        },
    })

 然后我们实现startPlay方法

    ​
        //开始抽奖
        startPlay(){
            cc.log('startPlay')
            //取得播放信息       
            var stateStart = this.animPlay.play('rotationStart')
            //从播放信息得到旋转角度数组的[0]元素（开始角度），并设置值为lastAngle
            this.getAngleClip(stateStart)[0] = this.lastAngle
            //转盘plat上面的label提示“等待结果”
            this.inforLabel.string = '等待\n结果'
            //设置定时器，“rotationStart”播放完播放“rotating”
            //stateStart.duration为“rotationStart”播放时长
            this.scheduleOnce(function(){
                this.processPlay()
            }, stateStart.duration)
        },
     
    ​

 然后实现getAngleClip方法和processPlay方法

        //得到rotationClip的旋转值数组
        getAngleClip(state){
            return state.curves[0].values
        },

        //正在抽奖
        processPlay(){
            cc.log('stateProcess')
            var stateProcess = this.animPlay.play('rotating')
            this.scheduleOnce(function(){
                //计时结束播放“rotationFinish”动画
                this.finishPlay()
            }, stateProcess.duration)
        },

 现在点击转盘可以旋转但是奖品还没有效果

在渲染函数update里添加渲染函数回调

    update (dt) {
        //当前角度映射到序号
        this.giftOrder = this.inforRotation(this.plat.rotation-this.originRota)
        //高亮该序号奖品
        this.highLightGift(this.giftOrder)
        //刷新序号Layout上的显示
        this.getResult()
    },

 现在实现旋转角度和奖品的映射关系

 

    //根据角度得到序号
    inforRotation(rotation){
        //角度 = 角度 - 360 * 圈数
        var _rotation = rotation - 360 * this.getRounds(rotation)
        // “360 / this.gifts.length” 为步长
        return parseInt(_rotation / (360 / this.gifts.length) )
    },

 

    //得到圈数
    getRounds(rotation){
        return parseInt(rotation / 360)
    },

    //高亮奖品
    highLightGift(order){
        //刷新所有奖品颜色为初始颜色
        this.refreshColor()
        //设置该序号奖品节点高亮
        this.gifts[order].node.color = cc.Color.GREEN
    },

 

    //刷新
    refreshColor(){
        //遍历奖品数组
        for(var _order = 0; _order < this.gifts.length; _order++){
            //设为白色
            this.gifts[_order].node.color = cc.Color.WHITE
        }
    },

 

        //显示结果
        getResult(){
            //设置序号表label显示
            this.resultLabel.string = this.giftOrder + 1
        },

最后实现随机停止得出结果finishPlay方法

        //停止抽奖
        finishPlay(){
            cc.log('finishPlay')
            var stateFinish = this.animPlay.play('rotationFinish')
            //再次旋转时，从上次的位置开始
            this.getAngleClip(stateFinish)[1] = this.originRota + this.randAngle()
            this.scheduleOnce(function(){
                //plat转盘字样变为“再次抽奖”
                this.inforLabel.string = '再次\n抽奖'
                //记录停止的角度
                this.lastAngle = this.getAngleClip(stateFinish)[1]
            }, stateFinish.duration)
        },

 实现随机角度

        //随机角度
        randAngle(){
            return parseInt(360 * cc.random0To1())
        },

 最后代码应该是这样

    /**************************************************
      # Author       :  AK-12
      # Last modified:  2018-09-14 15:51
      # Email        :  [e-mail]
      # github       :  https://github.com/Saber2pr
      # Filename     :  RandPlat.js
      # Description  :  
    **************************************************/
    cc.Class({
        extends: cc.Component,
     
        properties: {
            gifts: {
                default: [],
                type: [cc.Sprite]
            },
            plat:cc.Node,
            inforLabel:cc.Label,
            resultLayout:cc.Node,
        },
     
        originRota:null,
        animPlay:null,
        giftOrder:null,
        resultLabel:null,
        lastAngle:null,
     
        onLoad () {
            this.originRota = this.plat.rotation
            this.animPlay = this.plat.getComponent(cc.Animation)
            this.resultLabel = this.resultLayout.getChildByName('result').getComponent(cc.Label)
            this.lastAngle = this.originRota
        },
     
        start () {
            this.plat.on("touchstart", function(){
                cc.log('click')
                this.startPlay()
            }, this)
        },
     
        update (dt) {
            this.giftOrder = this.inforRotation(this.plat.rotation-this.originRota)
            this.highLightGift(this.giftOrder)
            this.getResult()
        },
        
        //随机角度
        randAngle(){
            return parseInt(360 * cc.random0To1())
        },
     
        //开始抽奖
        startPlay(){
            cc.log('startPlay')       
            var stateStart = this.animPlay.play('rotationStart')
            this.getAngleClip(stateStart)[0] = this.lastAngle
            this.inforLabel.string = '等待\n结果'
            this.scheduleOnce(function(){
                this.processPlay()
            }, stateStart.duration)
        },
        
        //正在抽奖
        processPlay(){
            cc.log('stateProcess')
            var stateProcess = this.animPlay.play('rotating')
            this.scheduleOnce(function(){
                this.finishPlay()
            }, stateProcess.duration)
        },
     
        //得到rotationClip的旋转值数组
        getAngleClip(state){
            return state.curves[0].values
        },
     
        //停止抽奖
        finishPlay(){
            cc.log('finishPlay')
            var stateFinish = this.animPlay.play('rotationFinish')
            this.getAngleClip(stateFinish)[1] = this.originRota + this.randAngle()
            this.scheduleOnce(function(){
                this.inforLabel.string = '再次\n抽奖'
                this.lastAngle = this.getAngleClip(stateFinish)[1]
            }, stateFinish.duration)
            cc.log(stateFinish)
        },
     
        //得到圈数
        getRounds(rotation){
            return parseInt(rotation / 360)
        },
        
        //得到序号
        inforRotation(rotation){
            var _rotation = rotation - 360 * this.getRounds(rotation)
            return parseInt(_rotation / (360 / this.gifts.length) )
        },
        
        //刷新
        refreshColor(){
            for(var _order = 0; _order < this.gifts.length; _order++){
                this.gifts[_order].node.color = cc.Color.WHITE
            }
        },
     
        //高亮奖品
        highLightGift(order){
            this.refreshColor()
            this.gifts[order].node.color = cc.Color.GREEN
        },
        
        //停止结果
        getResult(){
            this.resultLabel.string = this.giftOrder + 1
        },
     
    });

 

github地址

https://github.com/Saber2pr/CocosCreatorExam
---------------------  
作者：Prpr_Saber  
来源：CSDN  
原文：https://blog.csdn.net/u011607490/article/details/82701325  
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