教程目录
1 演示效果
2 实现原理
3 Demo


1 演示效果
主要参考9ria帖子,年代久远,忘了。
另可参考 jquery+css3实现元素颤抖特效  

PC演示地址

手机扫码:
 


2 实现原理
定时器,每隔一段时间改变震动对象的x,y。 可追加rotation和alpha。
使用方法

[C#] 纯文本查看 复制代码
1
2
震动目标obj,1秒内震动10次,震动最大距离10
ShakeTool.getInstance().shakeObj(obj, 1, 10, 10);




工具源码

[C#] 纯文本查看 复制代码
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/**
 * 震动工具
 * @author chenkai
 * [url=home.php?mod=space&uid=81950]@since[/url] 2017/5/24
 *
 * Example:
 * 震动目标obj,1秒内震动10次,震动最大距离10
 * ShakeTool.getInstance().shakeObj(obj, 1, 10, 10);
 */
class ShakeTool {
    private static instance:ShakeTool;   //单例
    private initX:number;                //初始位置
    private initY: number; 
    private target:egret.DisplayObject;  //震动目标
    private maxDis: number;              //震动距离
    private count: number = 0;           //计时器次数
    private rate: number;                //一秒震动次数
    private timer:egret.Timer = new egret.Timer(1000);
     
        public static getInstance():ShakeTool{
            if(this.instance == null){
                this.instance = new ShakeTool();
            }
            return this.instance;
        }
         
    /**
     * 震动显示对象
     * @param        target    震动目标对象
     * @param        time      震动持续时长(秒)
     * @param        rate      震动频率(一秒震动多少次)
     * @param        maxDis    震动最大距离
     */
    public shakeObj(target: egret.DisplayObject,time: number,rate: number,maxDis: number): void {
        this.target = target;
        this.initX = target.x;
        this.initY = target.y;
        this.maxDis = maxDis;
        this.count = time * rate;
        this.rate = rate;
     
        this.timer.delay = 1000/rate;
        this.timer.repeatCount = this.count;
        this.timer.addEventListener(egret.TimerEvent.TIMER,this.shaking, this);
        this.timer.addEventListener(egret.TimerEvent.TIMER_COMPLETE, this.shakeComplete, this);
        this.timer.reset();
        this.timer.start();
    }
     
    private shaking(): void {
        egret.Tween.removeTweens(this.target);
        this.target.x = this.initX - this.maxDis + Math.random()*this.maxDis*2;
        this.target.y = this.initY - this.maxDis +  Math.random()*this.maxDis*2;
        egret.Tween.get(this.target).to({x:this.initX, y:this.initY},999/this.rate);   
    }
     
    private shakeComplete(): void {
        if(this.target){
            egret.Tween.removeTweens(this.target);
            this.target.x = this.initX;
            this.target.y = this.initY;
        }
        this.timer.removeEventListener(egret.TimerEvent.TIMER,this.shaking,this);
        this.timer.removeEventListener(egret.TimerEvent.TIMER_COMPLETE,this.shakeComplete,this);
    }
 
    /**停止震动 */
    public stop(){
        this.shakeComplete();
    }
 
}
 
 
   





Demo下载:

https://files-cdn.cnblogs.com/files/gamedaybyday/Egret4.1.0_ShakeExample.7z

posted on 2018-06-24 11:13  gamedaybyday  阅读(1032)  评论(0编辑  收藏  举报