[]获取sprite对象的 width和height为0

/**

 * 船

 */

class Boat extends Laya.Sprite {

    private bt:Laya.Sprite;

    constructor() {

        super()

        this.bt = new Laya.Sprite()

        this.bt.loadImage("res/boat.png")

        this.addChild(this.bt)

    }

}

/**

 * 游戏背景

 */



class BackGround extends Laya.Sprite {

    //背景图

    private bg:Laya.Sprite;



    constructor(){

        super();

        this.init();

    }



    init():void{

        this.bg = new Laya.Sprite()

        this.bg.loadImage("res/background.png")

        this.addChild(this.bg)

    }

}

/**

* Game

*/

class Game {

  

    constructor(){

        Laya.init(768,1136);



        //设置适配模式

        Laya.stage.scaleMode = "showall";

        //设置剧中对齐

        Laya.stage.alignH = "center";

        //设置横竖屏

        Laya.stage.screenMode = "vertical";

        //创建背景

        let bg:BackGround = new BackGround();

        

        Laya.stage.addChild(bg);

        //创建船

        let bt:Boat = new Boat();

        Laya.stage.addChild(bt)



         //获取动画大小区域

        var bgBound: Laya.Rectangle = bg.getBounds();

        var btBound: Laya.Rectangle = bg.getBounds();





        console.log(bgBound.width/2)

        console.log(bgBound.height - 150)

        bt.pos(bgBound.width/2 - btBound.width/2,bgBound.height - 150)

    }



    

}

  

//启动游戏

new Game();