public class SnakeManager : MonoBehaviour {
    [SerializeField]
    private List<GameObject> snakeBodys = new List<GameObject>();
    [SerializeField]
    private GameObject snakePrefab;
    [SerializeField]
    private GameObject foodGo;
    [SerializeField]
    private float randomRange = 9.6f;

    private const float moveRate = 0.1f;
    private const float cellSize = 0.3f;

    private Vector3 lastOnePostion = new Vector3(0 , 0.15f , -0.9f);
    private int winCount = 300;
    private bool canRun = true;
	// Use this for initialization
	void Start () {
        StartCoroutine(move());
        createFood();
    }
	
	// Update is called once per frame
	void Update () {
        if(Input.GetKeyDown(KeyCode.W) || Input.GetKeyDown(KeyCode.UpArrow)) {
            snakeBodys[0].transform.rotation = Quaternion.Euler(0, 0, 0);
        }else if(Input.GetKeyDown(KeyCode.A) || Input.GetKeyDown(KeyCode.LeftArrow)) {
            snakeBodys[0].transform.rotation = Quaternion.Euler(0, -90, 0);
        } else if(Input.GetKeyDown(KeyCode.S) || Input.GetKeyDown(KeyCode.DownArrow)) {
            snakeBodys[0].transform.rotation = Quaternion.Euler(0, 180, 0);
        } else if(Input.GetKeyDown(KeyCode.D) || Input.GetKeyDown(KeyCode.RightArrow)) {
            snakeBodys[0].transform.rotation = Quaternion.Euler(0, 90, 0);
        }
    }

    IEnumerator move() {
        while(canRun) {
            lastOnePostion = snakeBodys[snakeBodys.Count - 1].transform.position;
            for(int i = snakeBodys.Count - 1; i >= 1; i--) {
                snakeBodys[i].transform.position = snakeBodys[i - 1].transform.position;
                snakeBodys[i].transform.rotation = snakeBodys[i - 1].transform.rotation;
            }
            snakeBodys[0].transform.Translate(Vector3.forward * cellSize);
            yield return new WaitForSeconds(moveRate);
        }
    }

    public void eatFood() {
        if(snakeBodys.Count > winCount)
            GameOver(true);
        GameObject go = Instantiate(snakePrefab) as GameObject;
        go.transform.SetParent(transform , false);
        go.transform.position = lastOnePostion;
        snakeBodys.Add(go);
        createFood();
    }

    void createFood() {
        float x = Random.Range(-randomRange, randomRange);
        float z = Random.Range(-randomRange, randomRange);
        Vector3 v3 = foodGo.transform.position;
        v3.x = x;
        v3.z = z;
        Collider[] hitColliders = Physics.OverlapSphere(v3, 0.5f);
        if(hitColliders.Length > 1) {
            createFood();
            return;
        }
        foodGo.SetActive(true);
        foodGo.transform.position = v3;
    }

    public void GameOver(bool isWin) {
        Debug.Log("gameover:" + isWin);
        canRun = false;
    }

    public void LeftTouchValueChange(Vector2 v2) {
        Vector2 inputV2 = v2.MinusOneToOne();
        snakeBodys[0].transform.LookAt(new Vector3(snakeBodys[0].transform.position.x + inputV2.x, snakeBodys[0].transform.position.y, snakeBodys[0].transform.position.z + inputV2.y));
    }
}
 

搖桿問題我弄了兩個，一個是虛擬搖桿，還有一個就是wsad電腦控制，這取決於個人。