AS3动态获得类名及类的方法

1.获得某个实例对象的类名：getQualifiedClassName (实例名字符串表达式);

 

stage.addEventListener(MouseEvent.MOUSE_OVER, mouseOverHandle);
function mouseOverHandle(e:Event):void {
	trace("over");
	//   返回instance**之类的        
	trace(e.target.name);
	//返回元件名   
	trace(getQualifiedClassName(e.target));
}

 

2.获得某个实例对象的类：constructor

 

dynamic class A {};
trace(A.prototype.constructor);// [class A]
trace(A.prototype.constructor == A);// true
var myA:A = new A();
trace(myA.constructor == A);// true

 

3.根据类名获得类： getDefinitionByName(类名);

 

package {
	import flash.display.DisplayObject;
	import flash.display.Sprite;
	import flash.utils.getDefinitionByName;

	public class GetDefinitionByNameExample extends Sprite {
		private var bgColor:uint = 0xFFCC00;
		private var size:uint = 80;

		public function GetDefinitionByNameExample() {
			var ClassReference:Class = getDefinitionByName("flash.display.Sprite") as Class;
			var instance:Object = new ClassReference();
			instance.graphics.beginFill(bgColor);
			instance.graphics.drawRect(0, 0, size, size);
			instance.graphics.endFill();
			addChild(DisplayObject(instance));
		}
	}
}

 

4.用得到的类实例化对象：一般中间要用一个无类型变量传递类，进行实例化；如:

 

var i = 0;
var c:* = getDefinitionByName(getQualifiedClassName("MyClass" + i));
var myClass:*=new c();