[]关于event中只读属性touches，问题，求解

package

{

	import laya.display.Text;

	import laya.events.Event;

	import laya.webgl.WebGL;

	

	public class DemoTouch

	{

		public function DemoTouch()

		{

			Laya.init(800, 600, WebGL);

			Laya.stage.bgColor = "#232628";

			

			var txt:Text = new Text();

			txt.text = "hello";

			txt.color = "#FF00FF";

			txt.width = 100;

			txt.height = 100;

			txt.x = 200;

			txt.y = 100;

			txt.fontSize = 50;

			txt.on("click", this, onFunc);

			Laya.stage.addChild(txt);

		}

		

		private function onFunc(e:Event):void

		{

			var arr:Array = e.touches;

			console.log("e.touchId="+e.touchId);

			console.log("arr[0]"+arr[0]);

		}

	}

}