Unity3D 场景管理单例模式

using UnityEngine;

using System.Collections;

 

public class SceneManager : MonoBehaviour
{
    private static SceneManager s_Instance = null;

    public static SceneManager instance
    {
        get
        {
            if(s_Instance == null)
            {
                s_Instance = FindObjectOfType(typeof(SceneManager)) as SceneManager;
            }
            if(s_Instance == null)
            {
                GameObject obj = new GameObject("SceneManager");
                s_Instance = obj.AddComponent(typeof(SceneManager)) as SceneManager;
                Debug.Log ("Could not locate an SceneManager object. \ SceneManager was Generated Automaticly.");
            }
        }

        return s_Instance;
    }

    void OnApplicationQuit()
    {
        s_Instance = null;
    }

    public void DoSomeThing()
    {
         Debug.Log("Doing something now", this);
    }
}