unity 单例

using System.Collections.Generic;
using System.Linq;
using UnityEngine;
 
public class BaseWindow : MonoBehaviour where T : MonoBehaviour
{
    static T instance;
 
    public static T Instance
    {
        get
        {
            if (instance == null)
            {
                // 先在场景中找寻
                List ts = Skode_GetTObjs();
 
                // 场景中找不到就报错
                if (ts.Count == 0)
                {
                    Debug.Log("该场景找不到该脚本:" + typeof(T));
                    return instance;
                }
 
                instance = ts[0];
 
                if (ts.Count > 1)
                {
                    foreach (var VARIABLE in ts)
                    {
                        Debug.Log("场景存在多个" + VARIABLE, VARIABLE.gameObject);
                    }
                }
            }
 
            return instance;
        }
    }
 
    /// 
    /// 获取场景中带有T组件的所有物体
    /// 
    public static List Skode_GetTObjs() where T : MonoBehaviour
    {
        List objectsInScene = new List();
        //该方法会连带预制体一起查找。因此gameObject.scene.name可过滤掉预制体
        foreach (T go in Resources.FindObjectsOfTypeAll().ToList())
        {
            if (!(go.hideFlags == HideFlags.NotEditable || go.hideFlags == HideFlags.HideAndDontSave ||
                  go.gameObject.scene.name == null))
                objectsInScene.Add(go);
        }
 
        return objectsInScene;
    }
}

用法

public class Test : BaseWindow
{
}

原文地址：https://blog.csdn.net/weixin_38239050/article/details/117066912?spm=1001.2014.3001.5501