c# - Unity协程无法跨场景工作

Question

我正在调用如下所示的协程，它附加到跨场景持续存在的 DontDestroyOnLoad 对象。

IEnumerator InitMaxScore()
{
    Debug.Log("will wait for some time");
    yield return new WaitForSeconds(1);
    GameObject[] coins = GameObject.FindGameObjectsWithTag("Coin");
    Debug.Log("coins length == " + coins.Length);
    if (coins.Length > 0)
    {
        maxScoreInitialized = true;
        maxScore = score + coins.Length * 10;
        foreach (GameObject healthPickup in GameObject.FindGameObjectsWithTag("Health"))
        {
            maxScore += healthPickup.GetComponent<Pickups>().pointsForLifePickup;
        }
        Debug.Log("maxScore inti == " + maxScore);
    }
    yield return null;
}

此协程在所述游戏对象的 OnLevelWasLoaded 事件中调用，该事件在唤醒时设置为 DontDestroyOnLoad ，如下所示。

private void Awake()
{
    int numGameSessions = FindObjectsOfType<GameSession>().Length;
    if (numGameSessions > 1)
    {
        Destroy(gameObject);
    }
    else
    {
        DifficultyManagement.setDifficulty(Difficulty.One); // start the game with diff one always
        DontDestroyOnLoad(this.gameObject);
    }
}

虽然协程中的日志“将等待一段时间”正在打印，但 Debug.Log("coins length == "+ coin.Length) 并不总是被打印。我当然不会在整个游戏过程中销毁所述游戏对象，这可能会导致协程出现这种行为。行为也不一致，有时有效，有时无效，我就想你为什么不能下定决心。

我已经为此烦恼了很长时间，似乎无法解决这个问题，任何线索都将不胜感激，以解除我的心理障碍:/

Answer 1

OnLevelWasLoaded 已弃用，请考虑使用 sceneLoaded 事件:

using UnityEngine.SceneManagement;

private void Awake()
{
    int numGameSessions = FindObjectsOfType<GameSession>().Length;
    if (numGameSessions > 1)
    {
        Destroy(gameObject);
    }
    else
    {
        DifficultyManagement.setDifficulty(Difficulty.One); // start the game with diff one always
        DontDestroyOnLoad(this.gameObject);
        SceneManager.sceneLoaded += (scene, mode) => StartCoroutine(InitMaxScore());
    }
}