Unity加載場景、計時器、加載時不銷毀某物體

異步加載場景，SceneManager.LoadSceneAsync(SceneName);需引用 using UnityEngine.SceneManagement;命名空間，

Application.LoadLevel這個方法不再適用；

可以用協同程序做一個簡單的計時器，詳見代碼；

DontDestroyOnLoad (this.gameObject);方法可以在加載場景時不銷毀指定物體；

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class Base : MonoBehaviour {
    
    public virtual void ScenesLoad(string SceneName,int AfterSomeMinutesToLoad)
    {
        StartCoroutine (Calculagraph(SceneName,AfterSomeMinutesToLoad));
    }
    IEnumerator Calculagraph(string SceneName,int AfterSomeMinutesToLoad)
    {
        yield return new WaitForSeconds (AfterSomeMinutesToLoad*60);
        DontDestroyOnLoad (this.gameObject);
        SceneManager.LoadSceneAsync(SceneName);
    }
}