Unity简单的单例模式

using UnityEngine;
using System.Collections;

public class SingleMono<T> : MonoBehaviour where T : MonoBehaviour
{
    private static T _instance;
    public static T Instance()
    {
        if (_instance == null)
        {
            _instance = (T)FindObjectOfType(typeof(T));
            if (_instance == null)
            {
                GameObject singleton = new GameObject();
                _instance = singleton.AddComponent<T>();
                singleton.name = "(singleton) " + typeof(T).ToString();
                DontDestroyOnLoad(singleton);
            }
        }
        return _instance;
    }
}

Tips:FindObjectOfType<Type type> 返回类型为type的活动的第一个对象