Couroutine無法啟動，因為游戲物件處于非活動狀態

我正在嘗試執行respawn，但如標題中所述，出現該錯誤。但是我該怎么做才能使物件被禁用，并在幾秒鐘后再次啟用它，而不會出現此錯誤？

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

public class playerCollision : MonoBehaviour
{
    public GameObject Destroy;

    [SerializeField] private Transform spawnPoint;
    [SerializeField] private Transform diePoint;

    private void OnCollisionEnter(Collision other)
    {
        if (other.gameObject.tag == "Enemy")
        {
            GameObject d = Instantiate(Destroy) as GameObject;
            d.transform.position = transform.position;
            d.SetActive(true);
            gameObject.SetActive(false);
            StartCoroutine(waitForRespawn());
            StartCoroutine(DestroyOptimization());
            IEnumerator DestroyOptimization()
            {
                yield return new WaitForSeconds(2);
                d.SetActive(false);
            }
        }
    }

    IEnumerator waitForRespawn()
    {
        yield return new WaitForSeconds(3);
        gameObject.SetActive(true);
        gameObject.transform.position = spawnPoint.transform.position;
    }
}

uj5u.com熱心網友回復：

您設定gameObject.SetActive(false);.. 以便錯誤正確地告訴您：您無法在未激活的物件上啟動協程。

由于您的協程沒有做任何花哨的事情，只會延遲某些事情，因此您可以使用Invoke它也適用于非活動物件：

public class playerCollision : MonoBehaviour
{
    public GameObject Destroy;
    
    [SerializeField] private Transform spawnPoint;
    [SerializeField] private Transform diePoint;

    private void OnCollisionEnter(Collision other)
    {
        if (other.gameObject.tag == "Enemy")
        {
            GameObject d = Instantiate(Destroy) as GameObject;
            d.transform.position = transform.position;
            d.SetActive(true);
            gameObject.SetActive(false);

            // will invoke the method called "Respawn" after 3 seconds
            Invoke(nameof(Respawn), 3f);;

            // will invoke the methd called "DestroyOptimization" aftre 2 seconds
            Invoke(nameof(DestroyOptimization), 2f);
        }
    }

    private void DestroyOptimization()
    {
        d.SetActive(false);
    }

    private void Respawn()
    {
        gameObject.SetActive(true);
        gameObject.transform.position = spawnPoint.transform.position;
    }
}

另一種方法是讓協程在控制器腳本上運行，該腳本本身不會處于非活動狀態。它實際上可以是任何 MonoBehaviour但你也可以有一個中央控制器腳本，例如

// is attached to an empty object in your scene which always stays active
public class CoroutineRunner : MonoBehaviour
{ 
    // Singleton instance
    private static CoroutineRunner _instance;

    // Lazy initialization of the Singleton
    public static CoroutineRunner Instance
    {
        get
        {
            if(_instance) return _instance;

            _instance = FindObjectOfType<CoroutineRunner>();

            if(_instance) return _instance;

            _instance = new GameObject(nameof(CoroutineRunner)).AddComponent<CoroutineRunner>();
        }
    }

    private void Awake()
    {
        if(_instance != null && _instance != this)
        {
            Destroy(gameObject);
            return;
        }

        _instance = this;
        DontDestroyOnLoad(gameObject);
    }  
}

然后做

public class playerCollision : MonoBehaviour
{
    public GameObject Destroy;
    
    [SerializeField] private Transform spawnPoint;
    [SerializeField] private Transform diePoint;

    private void OnCollisionEnter(Collision other)
    {
        if (other.gameObject.tag == "Enemy")
        {
            GameObject d = Instantiate(Destroy) as GameObject;
            d.transform.position = transform.position;
            d.SetActive(true);
            gameObject.SetActive(false);
            CoroutineRunner.Instance.StartCoroutine(waitForRespawn());
            CoroutineRunner.Instance.StartCoroutine(DestroyOptimization());
        }
    }

    private IEnumerator DestroyOptimization()
    {
        yield return new WaitForSeconds(2);
        d.SetActive(false);
    }

    private IEnumerator waitForRespawn()
    {
        yield return new WaitForSeconds(3);
        gameObject.SetActive(true);
        transform.position = spawnPoint.transform.position;
    }
}

標籤：C＃ 统一3d

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