12.10 오브젝트 풀 활용

코드:

 

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
 
public class App : MonoBehaviour
{
    public Button btn;
    public GameObject bulletPrefab;
    public objectPool objectPool;
    // Start is called before the first frame update
    void Start()
    {
        this.objectPool.Init(this.bulletPrefab);
        this.objectPool.PreLoad();
 
        btn.onClick.AddListener(() => {
            var bullet = this.objectPool.GetBullet();
            var initPos = new Vector3(0, 0, 1);
            bullet.Init(initPos);
            bullet.onDestroy = () =>
            {
                objectPool.Release(bullet);
            };
        });
 
    }
}
 

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class Bullet : MonoBehaviour
{
    public float speed =3.5f;
    public System.Action onDestroy;
    private Coroutine coroutine;
    public void Init(Vector3 initPos)
    {
        this.transform.position = initPos;
        this.gameObject.SetActive(true);
        this.Move();
    }
    public void Move()
    {
        coroutine = this.StartCoroutine(this.MoveImpl());
    }
    public IEnumerator MoveImpl()
    {
        while(true)
        {
            this.transform.Translate(Vector3.up * this.speed * Time.deltaTime);            
            yield return null;
        }
    }
    private void OnTriggerEnter2D(Collider2D collision)
    {
        Debug.LogFormat("OnTriggerEnter2D:{0}", collision);
        StopCoroutine(coroutine);
        this.onDestroy();
    }
    
}
 

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class objectPool : MonoBehaviour
{
    private List<Bullet> bullets;
    private GameObject bulletPrefab;
    public void Init(GameObject bulletprefab)
    {
        this.bullets = new List<Bullet>();
        this.bulletPrefab = bulletprefab;
    }
    public void PreLoad()//만들기
    {
        for(int i =0; i<10; i++)
        {
            var bulletGo = Instantiate<GameObject>(this.bulletPrefab);
            bulletGo.transform.SetParent(this.transform, false);
            bulletGo.transform.localPosition = Vector3.zero;
            bulletGo.SetActive(false);
            var bullet = bulletGo.GetComponent<Bullet>();
            this.bullets.Add(bullet);
        }
    }
    public Bullet GetBullet() //꺼내기
    {
        Bullet bullet = null;
        if (this.bullets.Count > 0)
        {
            bullet = this.bullets[0];
            this.bullets.RemoveAt(0);
            bullet.gameObject.SetActive(true);
            bullet.transform.SetParent(null);
        }
        else
        {
            //재사용할 총알 없음
            bullet = Instantiate<GameObject>(this.bulletPrefab).GetComponent<Bullet>();           
        }
        return bullet;
    }
    public void Release(Bullet bullet) // 넣기
    {
        bullet.transform.SetParent(this.transform, false);
        bullet.transform.localPosition = Vector3.zero;
        bullet.gameObject.SetActive(false);
        this.bullets.Add(bullet);
    }
}