MonoSingleton.cs

//参考: http://wiki.unity3d.com/index.php?title=Singleton
using UnityEngine;
 
public abstract class MonoSingleton<T> : MonoBehaviour where T : MonoSingleton<T>
{
  private static T instance = null;
 
  public static T Instance {
    get {
      //Scene内にあったら取得
      instance = instance ?? (FindObjectOfType (typeof(T)) as T);
      //TをアタッチしたGameObject生成してT取得
      instance = instance ?? new GameObject (typeof(T).ToString (), typeof(T)).GetComponent<T> ();
      return instance;
    }
  }
 
  private void OnApplicationQuit ()
  {
    instance = null;
  }
}