Unity泛型单例模式

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

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

        public static T Instance { get => instance; }

        protected virtual void Awake()
        {
            
            if (instance != null)
                Destroy(gameObject);
            else
                instance = (T)this;   
        }

        public static bool IsInitialized
        {
            get { return instance != null; }
        }

        protected virtual void OnDestroy()
        {
            if(instance == this)
            {
                instance = null;
            }
        }
    }