Creator 3.1移植 Creator 2.4.3 新手上路快速上手：tween缓动修改Position问题

Creator 2.x
#1

请问我在用3.1版本移植2.4版本2D游戏时，按照步骤首先创建一个重复跳动的小球。代码如下:

全局变量：

private accLeft:boolean = false;
private accRight:boolean = false;
private xSpeed:number = 0;
private hVer3: Vec3 = new Vec3(0,-120,0);

runJumpAction():Tween {

    let jumpUp = tween().by(this.jumpDuration,{position: new Vec3(0,this.jumpHeight,0)},{easing: 'sineOut'});
    let jumpDown = tween().by(this.jumpDuration,{position: new Vec3(0,-this.jumpHeight,0)},{easing: 'sineIn'});
    let targetTween = tween().sequence(jumpUp,jumpDown);
    return tween().repeatForever(targetTween);
}

随后按照逻辑在update生命周期内代码如下：

update (deltaTime: number) {
    if (this.accLeft) {
        this.xSpeed -= this.accel * deltaTime;
    }else if (this.accRight) {
        this.xSpeed += this.accel * deltaTime
    }

    if (Math.abs(this.xSpeed) > this.maxMoveSpeed) {
        this.xSpeed = this.maxMoveSpeed * this.xSpeed / Math.abs(this.xSpeed)
    }
    
    this.hVer3.x += this.xSpeed*deltaTime;
    // this.node.position = this.hVer3;
    this.node.setPosition(this.hVer3);
    // this._targetTw.set({position:this.hVer3});
    // console.log(this._targetTw)
}

现在的问题是逻辑内的hVer3的x值是变动了，但是小球依然不动。请教如何解决，谢谢！