Unity C# 脚本的单例

今天学习了一个比较不错的单例模式

 public class UnitySigleton <T>: MonoBehaviour where T:class
 {
     public static T instance;

     protected virtual void Awake(){
         if (instance != null) {
             DestroyImmediate (this);
             return;
         } else
             instance = this as T;
     }

     protected virtual void OnDistroy(){
         T t = this as T;
         if (this == t) {
             instance = null;
         }
     }
 }

但是这种单例，脚本需要手动挂在场景中！