每波增加敵人的生命值

正如標題所說，我想在每一波之后增加我的敵人 hp，但是在第一波之后我得到“IndexOutOfRangeException：索引超出了陣列的范圍。” 錯誤

注意：我仍然是初學者，這是我正在從事的第一個專案，我遵循了這個腳本的教程（我自己也寫了一些東西）

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

public class WaveSpawner : MonoBehaviour
{
    public enum SpawnState { SPAWNING, WAITING, COUNTING };
    public int waveNumber = 0;
    [SerializeField] public TMP_Text waveNumberTextValue;
    public bool waveEnded = false;

    [System.Serializable]
    public class Wave
    {
        public string name;
        public Transform enemy;
        public int count;
        public float rate;
    }

    public Wave[] waves;
    private int nextWave = 0;

    public Transform[] spawnPoints;

    public float timeBetweenWaves = 5f;
    private float waveCountdown;

    private float searchCountdown = 1f;

    private SpawnState state = SpawnState.COUNTING;


    void Start()
    {

        waveNumber = 1;
        waveCountdown = timeBetweenWaves;
    }
    
    public void EnemyHpIncrease()
    {
        if (waveEnded == true)
        {
            if(waveNumber <= 10)
            {
                FindObjectsOfType<EnemyHealth>()[0].enemyHealth  = 100f;
            }
            else
            {
                FindObjectsOfType<EnemyHealth>()[0].enemyHealth *= 1.1f;
            }
        }
    }

    void Update()
    {
        waveNumberTextValue.text = "Wave "   waveNumber.ToString("0");
        if(state == SpawnState.WAITING)
        {
            if(!EnemyIsAlive())
            {
                WaveCompleted();
                Debug.Log("hp increased by 100hp");
                waveEnded = true;
                waveNumber  ; 
                
                
            }
            else
            {
                return;
            }
        }

        if(waveCountdown <= 0)
        {
            if(state != SpawnState.SPAWNING)
            {
                StartCoroutine(SpawnWave(waves[nextWave]));
            }
        }
        else
        {
            waveCountdown -= Time.deltaTime;
        }
    }

    public void WaveCompleted()
    {
        waveEnded = true;
        EnemyHpIncrease();
        state = SpawnState.COUNTING;
        waveCountdown = timeBetweenWaves;

        if(nextWave   1 > waves.Length - 1)
        {
            nextWave = 0;
            Debug.Log("ALL WAVES COMPLETED!");
        }
            else
        {
            nextWave  ;
        }
    }

    bool EnemyIsAlive()
    {
        searchCountdown -= Time.deltaTime;
        if(searchCountdown <= 0f)
        {
            searchCountdown = 1f;
            if(GameObject.FindGameObjectWithTag("Enemy") == null)
            {
                
                return false;
            }
        }
        return true;
    }

    IEnumerator SpawnWave (Wave _wave)
    {
        Debug.Log("Spawning Wave"   _wave.name);
        state = SpawnState.SPAWNING;
        waveEnded = false;

        for (int i = 0; i < _wave.count; i  )
        {
            SpawnEnemy(_wave.enemy);
            yield return new WaitForSeconds( 1f/_wave.rate );
        }

        state = SpawnState.WAITING;
        yield break;
    }

    void SpawnEnemy(Transform _enemy)
    {
        Debug.Log("Spawning Enemy"   _enemy.name);
        Transform _sp = spawnPoints[Random.Range(0, spawnPoints.Length)];
        Instantiate (_enemy, _sp.position, _sp.rotation);
    }
}

我嘗試將 debug.log 放在任何地方，但在 WaveCompleted() 之后它不再顯示；在

                WaveCompleted();
                Debug.Log("hp increased by 100hp");
                waveEnded = true;
                waveNumber  ; 
         

錯誤：

IndexOutOfRangeException: Index was outside the bounds of the array.
WaveSpawner.EnemyHpIncrease () (at Assets/scripts/WaveSpawner.cs:48)
WaveSpawner.WaveCompleted () (at Assets/scripts/WaveSpawner.cs:93)
WaveSpawner.Update () (at Assets/scripts/WaveSpawner.cs:65)

uj5u.com熱心網友回復：

IndexOutOfRangeException 在第 48 行：

IndexOutOfRangeException: Index was outside the bounds of the array.
WaveSpawner.EnemyHpIncrease () (at Assets/scripts/WaveSpawner.cs:48) <-- line number here

將您的代碼復制到 Notepad 中，第 48 行似乎如下：

FindObjectsOfType<EnemyHealth>()[0].enemyHealth  = 100f;

代碼假設 FindObjectsOfType<> 方法的結果是回傳一個包含至少一個元素的陣列。我假設這種情況下的結果是一個空陣列，因此位置 0 處沒有元素。

如果 FindObjectsOfType 的回傳值應該是一個物件，而您只想更新一個物件，那么只有在陣列中至少有一個元素時才可以執行該操作。如果要更改所有回傳的物件，則需要使用回圈遍歷陣列foreach。

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