Simple implementation of unity object pool

unity Simple implementation of object pool , You can use it directly

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

public class ObjectPool
{
    
    public float DeadTime = 60f;
    private static ObjectPool instance;
    private ObjectPool()
    {
    
        pool = new Dictionary<string, List<GameObject>>();
        prefabs = new Dictionary<string, GameObject>();
    }
    public static ObjectPool Instance
    {
    
        get
        {
    
            if (instance == null)
            {
    
                instance = new ObjectPool();
            }
            return instance;
        }
    }

    /// <summary>
    ///  Object pool 
    /// </summary>
    private Dictionary<string, List<GameObject>> pool;

    /// <summary>
    ///  Presupposition 
    /// </summary>
    private Dictionary<string, GameObject> prefabs;

    /// <summary>
    ///  Get objects from the object pool 
    /// </summary>
    /// <param name="objName"></param>
    /// <returns></returns>
    public GameObject GetObj(string objName, string groupName = "ObjectPool")
    {
    
        // Result object 
        GameObject result = null;
        // Determine whether there is an object pool with this name 
        if (pool.ContainsKey(objName))
        {
    
            // There are objects in the object pool 
            if (pool[objName].Count > 0)
            {
    
                // To get the results 
                result = pool[objName][0];
                // Activate the object 
                result.SetActive(true);
                // Remove the object from the pool 
                pool[objName].Remove(result);
                // Return results 
                return result;
            }
        }
        // If there is no named object pool or the named object pool has no objects 

        GameObject prefab = null;
        // If the preset has already been loaded 
        if (prefabs.ContainsKey(objName))
        {
    
            prefab = prefabs[objName];
        }
        else     // If the preset has not been loaded 
        {
    
            // Load preset 
            prefab = Resources.Load<GameObject>("Prefabs/" + objName);
            // Update Dictionary 
            prefabs.Add(objName, prefab);
        }

        // Generate 
        result = UnityEngine.Object.Instantiate(prefab);
        // Change of name （ Remove  Clone）
        result.name = objName;

        // Increase sublease 
        var parentGo = GameObject.Find(groupName);
        if (parentGo == null)
        {
    
            parentGo = new GameObject(groupName);
        }

        result.transform.SetParent(parentGo.transform);

        // return 
        return result;
    }

    /// <summary>
    ///  Recycle objects to the object pool 
    /// </summary>
    /// <param name="objName"></param>
    public void RecycleObj(GameObject obj)
    {
    
        // Set to inactive 
        obj.SetActive(false);
        // Determine whether there is an object pool for this object 
        if (pool.ContainsKey(obj.name))
        {
    
            // Put into the object pool 
            pool[obj.name].Add(obj);
        }
        else
        {
    
            // Create a pool of this type , And put the object into 
            pool.Add(obj.name, new List<GameObject>() {
     obj });
        }

    }

}

Usage method ：
Place the preform in Assets\Resources\Prefabs Under the table of contents ,
You need to create objects ObjectPool.GetObj(objName,ObjectPool);
You need to recycle objects RecycleObj(obj);(ps: You can do it yourself GameObject Implement the extension method );