AS3定时任务管理工具类

       用timer实现的定时任务工具类，有registerDelay和register俩个方法，一个是延迟任务，一个是立即执行的方法。该定时器依赖于flash的Enterframe帧频，请注意。使用前请调用init方法初始化。如有不足请指出。

package com.core.timer
{
	import flash.display.Sprite;
	import flash.display.Stage;
	import flash.events.Event;
	import flash.utils.Dictionary;
	import flash.utils.getTimer;

	/**    
	 * 定时器
	 * @author yuebinbin
	 * @date 2012-12-30
	 * */
	public class EnterframeTimer extends Sprite
	{
		/** 注册的任务集合 */
		private var _dic:Dictionary;
		/** 任务数量 */
		private var _count:int;
		private static var _instance:EnterframeTimer;
		
		public function EnterframeTimer()
		{
			if (_instance != null) {
				throw new Error();
			}
		}
		
		public static function getInstance():EnterframeTimer
		{
			if (_instance == null) 
			{
				_instance = new EnterframeTimer();
			}
			return _instance;
		}
		
		/** 
		 * 初始化
		 * */
		public function init(stage:Stage):void
		{
			_dic = new Dictionary();
			_count = 0;
			stage.addEventListener(Event.ENTER_FRAME, execute);
		}
		
		private function execute(e:Event):void
		{
			var timer:int = getTimer();
			for each(var obj:Object in _dic) 
			{
				if (obj["delayTime"] == 0 && obj["flag"])
				{
					obj["fun"](obj["args"]);
					obj["times"] = obj["times"] - 1;
					obj["flag"] = false;
				} 
				else 
				{
					if (timer - obj["registerTime"] <= obj["delayTime"] && obj["flag"]) 
					{
						continue;
					}
					if (timer - obj["registerTime"] >= obj["interval"])
					{
						obj["registerTime"] = timer;
						obj["fun"](obj["args"]);
						obj["times"] = obj["times"] - 1;
						obj["flag"] = false;
					}
				}
				
				if (obj["times"] == 0) 
				{
					delete _dic[obj["key"]];
				}
			}
		}
		
		/**
		 * 注册任务
		 * @para interval:间隔时间， times：执行次数， fun:执行函数
		 * */
		public function register(interval:int = 1000, times:int = 1, fun:Function = null, ...args):int
		{
			var key:int = -1;
			if (fun != null) 
			{
				var _obj:Object = new Object();
				key = ++_count;
				trace(_obj);
				trace(_obj["fun"]);
				_obj["registerTime"] = getTimer();
				_obj["fun"] = fun;
				_obj["interval"] = interval;
				_obj["times"] = times;
				_obj["args"] = args;
				_obj["delayTime"] = 0;
				_obj["flag"] = true;
				_obj["key"] = key;
				_dic[key] = _obj;
			}
			return key;
		}
		
		/**
		 * 注册延迟任务
		 * @para interval:间隔时间， times：执行次数， delayTime：延迟时间， fun:执行函数
		 * */
		public function registerDelay(interval:int = 1000, times:int = 1, delayTime:int = 0, fun:Function = null, ...args):int
		{
			var key:int = -1;
			if (fun != null) 
			{
				var _obj:Object = new Object();
				key = ++_count;
				_obj["registerTime"] = getTimer();
				_obj["fun"] = fun;
				_obj["interval"] = interval;
				_obj["times"] = times;
				_obj["args"] = args;
				_obj["delayTime"] = delayTime;
				_obj["flag"] = true;
				_obj["key"] = key;
				_dic[key] = _obj;
			}
			return key;
		}
		
		/**
		 * 移除任务
		 * */
		public function unregister(key:int):void
		{
			if (key != -1) 
			{
				delete _dic[key];
			}
		}
		/**
		 * 销毁计时器
		 * */
		public function destroy():void
		{
			_dic = null;
			this.removeEventListener(Event.ENTER_FRAME, execute);
		}
	}
}

测试代码：

package
{
	import com.core.timer.EnterframeTimer;
	
	import flash.display.Sprite;
	import flash.utils.getTimer;
	
	public class test extends Sprite
	{
		public function test()
		{
			EnterframeTimer.getInstance().init(this.stage);
			EnterframeTimer.getInstance().register(2000,3,function():void{
				trace("#####################" + getTimer());
			});
		}
	}
}

代码输出结果：