Unity不销毁的单例写法

    // Use this for initialization
    void Awake()
    {

        if (instance == null)
        {
            instance = this;
            DontDestroyOnLoad(this);
            name = "UserManager";

        }
        else if (this != instance)
        {
            string sceneName = SceneManager.GetActiveScene().name;
            Debug.Log("删除场景" + sceneName + "的" + name);
            Destroy(gameObject);
        }
    }