Unity使用IEnumerator调整InvokeRepeating生成间隔不生效求助

问题原因 #

你调用InvokeRepeating的时候，传入的spawnSpeed是值传递，Unity会直接把你调用那一刻的数值存下来作为固定调用间隔，后续你修改spawnSpeed变量不会同步到已经启动的InvokeRepeating逻辑里，所以才会出现修改不生效的情况。

解决方案1：全协程实现生成逻辑（更推荐） #

直接把障碍物生成逻辑也整合到协程里，每次等待都用最新的spawnSpeed值，代码修改如下：

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

public class ObstaclesController : MonoBehaviour
{
    public GameObject obstacle;
    public Transform ObstacleMarker;
    private float CloneLifeTime = 4f;
    float spawnSpeed;
    float spawnInterval = 3;
    float minSpawn = -4;
    float maxSpawn = 0;

    void Start()
    {
        spawnSpeed = 2f;
        StartCoroutine(SpawnObstaclesContinuously());
        StartCoroutine("IncreaseSpeedWithInterval");
    }

    // 新增生成障碍物协程
    IEnumerator SpawnObstaclesContinuously()
    {
        // 首次生成等待初始间隔
        yield return new WaitForSeconds(spawnSpeed);
        while (true)
        {
            AddingObstacle();
            // 每次间隔取当前最新的spawnSpeed值
            yield return new WaitForSeconds(spawnSpeed);
        }
    }

    IEnumerator IncreaseSpeedWithInterval()
    {
        while (true)
        {
            yield return new WaitForSeconds(spawnInterval);
            spawnSpeed *= 1.5f;
        }
    }

    private void AddingObstacle()
    {
        float randomLocation = Random.Range(minSpawn, maxSpawn);
        GameObject obstacleClone = Instantiate(obstacle, ObstacleMarker.position, ObstacleMarker.rotation);
        obstacleClone.transform.position = new Vector3(ObstacleMarker.transform.position.x, randomLocation, ObstacleMarker.transform.position.z);
        Destroy(obstacleClone, CloneLifeTime);
    }
}

解决方案2：修改速度时重启InvokeRepeating #

如果你不想调整现有结构，也可以每次调整spawnSpeed后先取消原来的Invoke任务，再用新参数重新启动，修改点如下：

void Start()
{
    spawnSpeed = 2f;
    StartCoroutine("IncreaseSpeedWithInterval");
    InvokeRepeating("AddingObstacle", spawnSpeed, spawnSpeed);
}

IEnumerator IncreaseSpeedWithInterval()
{
    while (true)
    {
        yield return new WaitForSeconds(spawnInterval);
        spawnSpeed *= 1.5f;
        // 取消旧的Invoke任务
        CancelInvoke("AddingObstacle");
        // 用新的间隔重新启动
        InvokeRepeating("AddingObstacle", spawnSpeed, spawnSpeed);
    }
}

额外提示 #

你现有逻辑里spawnSpeed *=1.5f会让生成间隔越来越大，障碍物生成越来越慢。如果你需要的是难度提升、生成越来越快的效果，应该改成spawnSpeed /=1.5f，同时可以加个最小间隔阈值，避免生成速度过快影响游戏体验。

内容的提问来源于stack exchange，提问作者Hernaldo Sandoval