IEnumerator 在yield return new WaitForSeconds 后跳过代码

Question

我正在尝试按照 Unity Learn 教程使用协程在游戏中生成立方体，但我做了与教程中相同的所有操作，代码不起作用，并在产量返回新的 WaitForSeconds 后跳过代码。我已经在 stackoverflow 中查看了问题，只有我能找到有同样问题的人，但唯一接受的答案是““可能”在 WaitForSeconds 输入的时间过去之前杀死场景”并且代码是正确的，但有问题场景中。所以，作为一个 Unity 和 C# 新手，我无法解决这个问题。

我在游戏中使用了此代码作为难度按钮；

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class DifficultyButton : MonoBehaviour
{
    private GameManager gameManager;
    private Button button;
    // Start is called before the first frame update
    void Start()
    {
        button = GetComponent<Button>();
        button.onClick.AddListener(SetDifficulty);
        gameManager = GameObject.Find("Game Manager").GetComponent<GameManager>();
    }

    // Update is called once per frame
    void Update()
    {
        
    }

    void SetDifficulty()
    {
        Debug.Log(gameObject.name + " was clicked");
        gameManager.StartGame();
    }
}

而这个按钮脚本中使用的GameManager脚本是这样的；

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro;
using UnityEngine.SocialPlatforms.Impl;
using UnityEngine.SceneManagement;
using UnityEngine.UI;
using System.Runtime.CompilerServices;

public class GameManager : MonoBehaviour
{
    public List<GameObject> targets = new List<GameObject>(4);
    public TextMeshProUGUI scoreText;
    public TextMeshProUGUI gameOverText;
    public Button restartButton;
    public bool isGameActive;

    private float score = 0;
    private float spawnRate = 1.0f;
    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        
    }

    IEnumerator SpawnTarget() 
    {
        Debug.Log("hop ordayım");
        Debug.Log("isGameActive: " + isGameActive);
        while (isGameActive)
        {
            Debug.Log("Sonunda burdayım");
            
            yield return new WaitForSeconds(spawnRate);
            Debug.Log("Buraya da geldim");
            int index = Random.Range(0 ,targets.Count);
            Debug.Log("Buraya da");
            Instantiate(targets[index]);
            Debug.Log("cok sukur be");
        }

    }

    public void UpdateScore(int scoreToAdd) 
    {
        score += scoreToAdd;
        scoreText.text = "Score:" + score;
    }

    public void GameOver() 
    {
        gameOverText.gameObject.SetActive(true);
        restartButton.gameObject.SetActive(true);
        isGameActive = false;
    }

    public void RestartGame()
    {
        SceneManager.LoadScene(SceneManager.GetActiveScene().name);
    }

    public void StartGame()
    {
        isGameActive = true;
        StartCoroutine(SpawnTarget());
        Debug.Log("geldim");
        UpdateScore(0);
    }
}

我使用 Debug.Log 来查看发生了什么，当我单击简单按钮时的输出是这样的；

Easy Button was clicked
hop ordayım
isGameActive: True
Sonunda burdayım
geldim

所以打印“geldim”后它不会继续，尽管我在打印“geldim”后等待超过1秒；

预期产出；

...
geldim
Buraya da geldim
Buraya da
cok sukur be

为什么会发生这种情况？我该怎么办？

Answer 1

在最后添加yield return null