[LayaAir 2.0]sprite.loadImage加载图片怎么设置要显示的x,y坐标和宽高？

import TiledMap = Laya.TiledMap;

class GameMain{

    private tMap:TiledMap;



    constructor()

    {

        Laya.init(935, 224, Laya.WebGL);



        this.tMap = new TiledMap();

        

        var viewRect: Laya.Rectangle = new Laya.Rectangle(0, 0, Laya.stage.width, Laya.stage.height);

        

        this.tMap.createMap("res/mario_map/new_map2.json", viewRect, Laya.Handler.create(this,this.initMap));

        

    }



    private initMap(): void {

        

        var layer = this.tMap.getLayerByIndex(9);

        var gs = layer.getObjectByName('others1');        



        var sp: Laya.Sprite = new Laya.Sprite();

        sp.loadImage("res/smallWalkRight.png");



        sp.pos(gs.x, gs.y);

        layer.addChild(sp);

    }

}



new GameMain();