unity泛型对象池

代码

using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Unity.VisualScripting;
using UnityEngine;


public abstract class Objectpool<T> : MonoBehaviour where T : Component
{
    private Queue<T> pool = new Queue<T>();
    [SerializeField] private T prefab;
    [SerializeField] private int maxPoolCapacity = 100;
    public static Objectpool<T> Instance;

    private void Awake()
    {
        if (Instance == null)
        {
            Instance = this;
            DontDestroyOnLoad(gameObject);
        }
        else
        {
            if (Instance != this) Destroy(gameObject);
        }
    }//单例模式

    public T Get()
    {
        if (pool.Count == 0)
        {
            Add(1);
        }//如果池内没有元素那么新建一个
        T obj = pool.Dequeue();
        obj.gameObject.SetActive(true);
        ResetObject(obj); // 重置对象状态在引用该方法的类中实现
        return obj;
    }

    protected abstract void ResetObject(T obj);

    public void ReturnToPool(T obj)
    {
        obj.gameObject.SetActive(false);//把使用完的对象重新返回池中待使用
        pool.Enqueue(obj);
    }
    public void Add(int num)
    {
        if (prefab == null)//空状态检查
        {
            Debug.LogError("Prefab is null. Cannot instantiate objects.");
            return;
        }
        if(pool.Count() + num >= maxPoolCapacity)
        {
            Debug.LogError("pool will be full!");
            return;
        }
        for (int i = 0; i < num; i++)//创建num个实例加入池中
        {
            var temp = Instantiate(prefab);
            temp.gameObject.SetActive(false);
            pool.Enqueue(temp);
        }
    }
}