Flash/Flex学习笔记(35)：如何正确监听Stage对象的事件

package{
	
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
	
	public class MyClass extends Sprite{
		
		public function MyClass(){
			trace("MyClass 构造函数被调用了...");			
			trace(this.stage);//输出null			
			addEventListener(Event.ADDED_TO_STAGE,AddedToStageHandler);
		}
		
		function AddedToStageHandler(e:Event):void{
			trace(this.stage);//这时才能获得stage引用 
			
			this.stage.addEventListener(MouseEvent.MOUSE_DOWN,MouseDownHandler)		
		}
		
		function MouseDownHandler(e:Event):void{
			trace("you clicked the stage");
		}
		
		
	}
}

var mycls:MyClass = new MyClass();
addChild(mycls);