【咸鱼教程】Egret实现摇一摇功能

教程目录
一 实现原理
二 代码
三 Demo下载

一 实现原理
监听设备旋转角度的变化，来判断用户是否摇动手机。

参考：
智能手机里陀螺仪和重力感应有何区别？
HTML5实现摇一摇的功能
Egret官方陀螺仪教程

二 代码
摇一摇工具类ShakeTool使用范例

[Actionscript3] 纯文本查看 复制代码

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private shakeTest(){         this.shakeTool = new ShakeTool();         this.shakeTool.addEventListener(egret.Event.CHANGE, this.onChange,this);         this.shakeTool.start(); }   private onChange(e:egret.Event){        var data = e.data;        //用户大概晃动了手机2-3次        if(data.shakeCount > 6){                 egret.log("摇一摇完成");                  this.shakeTool.stop();         } }

ShakeTool源码

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/**  * 摇一摇工具类  * @author chenkai  * [url=home.php?mod=space&uid=81950]@since[/url] 2017/4/20  */ class ShakeTool extends egret.EventDispatcher{         private orientation:egret.DeviceOrientation; //设备方向变化         private xAngle: number = 0;     //设备绕x角度         private yAngle: number = 0;     //设备绕y角度         private zAngle: number = 0;     //设备绕z角度         private last_x: number = 0;     //上一次绕x角度         private last_y: number = 0;     //上一次绕y角度         private last_z: number = 0;     //上一次绕z角度         private shakeCount: number = 0; //摇动次数         private lastTime:number = 0;    //上一次更新时间         private shakeAngle:number = 45; //当晃动角度大于一定角度时，算摇动一次           public constructor(){                 super();         }           /**开始 */         public start(){                 //重置数据                 this.shakeCount = 0;                 this.lastTime = 0;                 this.last_x = 0;                 this.last_y = 0;                 this.last_z = 0;                   //开始监听                 this.orientation || (this.orientation = new egret.DeviceOrientation());                 this.orientation.addEventListener(egret.Event.CHANGE,this.onOrientation,this);                 this.orientation.start();         }           /**停止 */         public stop(){                 if(this.orientation){                         this.orientation.removeEventListener(egret.Event.CHANGE,this.onOrientation,this);                         this.orientation.stop();                 }         }           private onOrientation(e: egret.OrientationEvent) {                 var curTime:number = egret.getTimer();                   //每100ms判断一次                 if(curTime - this.lastTime > 100){                         this.lastTime = curTime;                           this.xAngle = e.beta;   //x轴                         this.yAngle = e.gamma;  //y轴                         this.zAngle = e.alpha ; //z轴                           //旋转超过一定角度，则算摇动一次                         if(Math.abs(this.last_x - this.xAngle)>this.shakeAngle ||                                 Math.abs(this.last_y - this.yAngle)>this.shakeAngle ||                                 Math.abs(this.last_z - this.zAngle)>this.shakeAngle){                                         this.shakeCount ++;                         }                         this.last_x = this.xAngle;                         this.last_y = this.yAngle;                         this.last_z = this.zAngle;                 }                   //派发事件(应该在shakeCount++时派发一次，写在这里只是为了方便显示测试数据...)                 this.dispatchEventWith(egret.Event.CHANGE,false, {x:this.xAngle,y:this.yAngle,z:this.zAngle,shakeCount:this.shakeCount});         } }

三 Demo下载