我正在练习我的Unity编程，通过创建一个自上而下的射击游戏，就像Stardew Valley的“草原之王之旅”。当我上下看并射击时，我试图将子弹旋转90度，以便它面向正确的方向。然而，每当我旋转子弹时，当我面朝上时，它向左移动，当我面朝下时，它向右移动。没有任何旋转，它运行得很好。下面是我的代码：

public class BulletMovement : MonoBehaviour
{
    public Vector2 moveDirection;
    private GameObject player;
    public int speed;
    
    // Start is called before the first frame update
    void Start()
    {
        player = GameObject.Find("Player");
        Move();
    }

    // Update is called once per frame
    void Update()
    {
        transform.Translate(moveDirection * Time.deltaTime * speed);
        CheckIfOutOfBounds();
    }
    
    //Moves the bullet in the direction the player is facing when the bullet is fired
    private void Move()
    {
        if (player.GetComponent<PlayerMovement>().GetPlayerFacing().Equals("up"))
        {
            RotateBullet(90);
            moveDirection = new Vector2(0, 1);
        }
        if (player.GetComponent<PlayerMovement>().GetPlayerFacing().Equals("down"))
        {
            RotateBullet(90);
            moveDirection = new Vector2(0, -1);
        }
        if (player.GetComponent<PlayerMovement>().GetPlayerFacing().Equals("left"))
        {
            //Moves the bullet in front of the gun
            transform.Translate(-0.363f, 0, 0);
            moveDirection = new Vector2(-1, 0);
        }
        if (player.GetComponent<PlayerMovement>().GetPlayerFacing().Equals("right"))
        {
            //Moves the bullet in front of the gun
            transform.Translate(0.363f, 0, 0);
            
            moveDirection = new Vector2(1, 0);
        }
    }

    //Destroys the bullet if it goes off-screen
    private void CheckIfOutOfBounds()
    {
        if (transform.position.x is > 10 or < -10)
        {
            Destroy(gameObject);
        }

        if (transform.position.y is > 10 or < -10)
        {
            Destroy(gameObject);
        }
    }

    private void RotateBullet(int degrees)
    {
        transform.rotation = Quaternion.Euler(new Vector3(0, 0, degrees));
    }
}

尝试：
transform.Rotate（Vector 3（0，0，90））transform.Rotate（Vector3.right））transform.rotation = Quaternion.Euler（new Vector 3（0，0，degrees））; ->当前使用