SimUL/Assets/Scripts/SceneManager.cs

using UnityEngine;

public class SceneManager : MonoBehaviour
{
    [SerializeField]
    private LevelChanger _levelChanger;

    public static SceneManager Instance { get; private set; }

    private void Awake()
    {
        if (Instance == null)
        {
            Instance = this;
            DontDestroyOnLoad(gameObject);
        }
        else
            Destroy(gameObject);

    }

    private void Start()
    {
        _levelChanger.gameObject.SetActive(true);
        _levelChanger.FadeIn(OnSceneChanged);
    }

    public void ChangeScene(string sceneName)
    {
        _levelChanger.gameObject.SetActive(true);
        _levelChanger.FadeToLevel(sceneName, OnSceneChanged);

    }
    private void OnSceneChanged()
    {
        _levelChanger.gameObject.SetActive(false);
    }
}