如何在 foreach 循环中访问字符控制器变量列表

Question

Hi, so I'm currently trying to set my enemies aggro bool to true if another enemy takes damage. 

//list for enemies
    public List<CharacterController> enemies = new List<CharacterController>();

//variables for aggro range and aggressive check
    public float aggroRange;
    public bool isAggressive;

        int nearestTarget = 0;
        //cycling through player character list
        for (int i = 1; i < GameManager.instance.playerCharacters.Count; i++)
        {
            //if any of the player characters positions arent within our aggro range
            if (Vector3.Distance(transform.position, GameManager.instance.playerCharacters[nearestTarget].transform.position) > aggroRange)
            {
                //they are not aggressive
                isAggressive = false;
                // if non aggressive enemies health becomes lower than max health, they have taken damage
                if (GameManager.instance.activePlayer.currentHealth < GameManager.instance.activePlayer.maxHealth)
                {
                    
                    //||||  Figure out how to cylce through enemies and set them all to aggressive when one takes damage ||||
                    foreach (CharacterController allies in enemies)
                    {
                       //solution 1 - setting larget aggro range so they aggro anyway
                        //aggroRange = 20f;
                        //isAggressive = true;
                        //solution 2 - accessing the component on the script?
                        //allies.GetComponent<AIBrain>().aggroRange = 20f;
                        //allies.GetComponent<AIBrain>().isAggressive = true;
                    }
                    //set them as aggressive - Disables when fixed above logic
                    isAggressive = true;

                }
            }
            //players are within AI aggro range
            else
            {
                //set them as aggressive
                isAggressive = true;
                
            }

`敌人被正确添加到列表中，并试图在第二个 foreach 循环中循环遍历列表并设置它们具有侵略性。尝试过的解决方案在循环中被评论无济于事。

如果格式不好，我深表歉意，我是堆栈溢出的新手。`

Answer 1

使用事件通常是一种更有效和更有组织的方式来处理这种情况😁

实现此目的的一种方法是向您的 AIBrain 脚本添加一个事件，该事件将在该角色受到伤害时触发。然后，您可以订阅该事件，当事件被触发时，将所有订阅角色的 isAggressive 布尔值设置为 true。

在你的 AIBrain 脚本中，定义一个受到伤害的事件：

公共事件 Action OnTakeDamage；

public void TakeDamage()
{
    // take damage logic...

    // trigger the OnTakeDamage event
    OnTakeDamage?.Invoke(this);
}

当敌人受到伤害时，你需要调用 TakeDamage() （所以无论你在哪里受到伤害，也调用它）。在您的 AIBrain 脚本中，为敌人列表中的每个敌人订阅 OnTakeDamage 事件：

void Start()
{
    // subscribe to OnTakeDamage event for each enemy in the enemies list
    foreach (AIBrain enemy in enemies)
    {
        enemy.OnTakeDamage += OnEnemyTakeDamage;
    }
}

void OnDestroy()
{
    // unsubscribe from OnTakeDamage event for each enemy in the enemies list
    foreach (AIBrain enemy in enemies)
    {
        enemy.OnTakeDamage -= OnEnemyTakeDamage;
    }
}

void OnEnemyTakeDamage(AIBrain enemy)
{
    // set isAggressive to true for all enemies
    foreach (AIBrain ally in enemies)
    {
        ally.isAggressive = true;
    }
}

通过此实现，每当敌人受到伤害并触发 OnTakeDamage 事件时，将为所有订阅的敌人调用 OnEnemyTakeDamage 方法，将其 isAggressive 布尔值设置为 true。

让我知道这是否有效，或者您是否需要任何帮助！

Answer 2

        for (int i = 1; i < GameManager.instance.playerCharacters.Count; i++)
    {
        //if any of the player characters positions arent within our aggro range
        if (Vector3.Distance(transform.position, GameManager.instance.playerCharacters[nearestTarget].transform.position) > aggroRange)
        {
            //they are not aggressive
            //isAggressive = false;
            // if non aggressive enemies health becomes lower than max health, they have taken damage
            if (GameManager.instance.activePlayer.currentHealth < GameManager.instance.activePlayer.maxHealth)
            {
                
                //||||  Figure out how to cylce through enemies and set them all to aggressive when one takes damage ||||
                foreach (CharacterController allies in enemies)
                {
                     
                    //solution 1 - setting larget aggro range so they aggro anyway
                    //aggroRange = 20f;
                    //isAggressive = true;
                    //solution 2 - accessing the component on the script?
                    allies.GetComponent<AIBrain>().aggroRange = 20f;
                    allies.GetComponent<AIBrain>().isAggressive = true;


                }
                //set them as aggressive - Disables when fixed above logic
                //isAggressive = true;
             
                isAggressive = false;

            }

在循环解决问题后将 isAggressive 移动到。不确定为什么。