Forked from:: Fumio's Testing weak reference

疑問

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license : MIT License
modified : 2009-09-04 06:03:26

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package {
    import flash.display.Sprite;
    import flash.utils.Timer;
    import flash.system.System;
    import flash.text.TextField;
    import flash.text.TextFieldAutoSize;
    import flash.events.Event;
    import flash.events.TimerEvent;
    public class TestingWeakRef extends Sprite {
        private var my_txt:TextField = new TextField();
        
        /*
        疑問
        こんなふうにリスナーが消えてしまった場合、
        removeListenerした場合とどう違うのか？
        内部にリスナーの登録自体はのこるのか、
        */
        public function TestingWeakRef() {
            var myTimer:Timer = new Timer(1);
			var listener:Function = function():void {
				my_txt.text = 
				String(new Date().time) + ": " + 
				String(System.totalMemory);				
			}
            addEventListener(Event.ENTER_FRAME, listener, false, 0, true);   // 弱い参照を指定
            my_txt.wordWrap = true;
            my_txt.autoSize = TextFieldAutoSize.LEFT;
            addChild(my_txt);
            myTimer.addEventListener(TimerEvent.TIMER, xTest);
            myTimer.start();
        }
        private function xTest(eventObject:Event):void {
            new TextField();
            //trace('timer');
        }
		
    }
}

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