传递刚体的值不会使对象移动

Question

这是附加到对象上的敌人脚本。我真的不知道为什么它不起作用，但是除了刚体之外，我传递的其他值也起作用。也没有显示警告或错误。

public class Enemy : MonoBehaviour {

private EnemyMovement movement;

private Rigidbody2D rBody;

public GameObject ball;

void Start () {
    rBody = GetComponent<Rigidbody2D> ();
    movement = new EnemyMovement ();
    movement.SetJump(false);
    movement.SetWalkDur (Random.Range (0, EnemyMovement.MAX_WALK_DURATION));
    movement.SetSwapDirDur (Random.Range (0, 
    EnemyMovement.MAX_SWAP_DIRECTION_DURATION));
}

void FixedUpdate () {
    if (movement.IsJump()) {
        movement.Jump (ball, rBody, transform);
    } else {
        movement.Move (rBody, transform);
    }
}

这是EnemyMovement类，我在其中传递了刚体的值。

public class EnemyMovement{
    public EnemyMovement(){}

    public void Move(Rigidbody2D rBody, Transform transform){
        walkDur -= Time.deltaTime;
        swapDirDur -= Time.deltaTime;

        if(swapDirDur <= 0)
            swapDirDur = Random.Range (0, MAX_SWAP_DIRECTION_DURATION);

        if (walkDur <= 0) {
            jumpStatus = true;
            walkDur = Random.Range (0, MAX_WALK_DURATION);
        }

        switch (side) {
            case "Top":
                Movement ("Horizontal", rBody, transform);  
            break;
            case "Bottom":
                Movement ("Horizontal", rBody, transform);
            break;
            case "Right":
                Movement ("Vertical", rBody, transform);
            break;
            case "Left":
                Movement ("Vertical", rBody, transform);
            break;
        }
    }
}

我真的找不到解决我问题的方法。我希望这里有人可以帮助我。