泛型单例

unity中有很多地方需要用到单例，每个都写一遍的话就显得冗余，所以就可以写一个泛型单例，以后单例脚本直接继承就可以了。

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

public class Singleton<T> : MonoBehaviour where T : Singleton<T>
{

    private static T instance;
    private static object _lock = new object();

    public static T Instance
    {
        get
        {
            lock (_lock)
            {
                if (instance == null)
                {
                    GameObject go = new GameObject();
                    instance = go.AddComponent<T>();
                    go.name = typeof(T).Name;
                }
                return instance;
            }
        }  
    }
}