Unity中的C＃事件

Question

I have two scripts attached to two different game objects, and in one of them I have an Action like this:

public class EnemeyController : MonoBehavior
{
    internal Action EnemyWaveKilled;

    private void OnTriggerEnter2D(Collider2D other)
    {
        // If hit by a bullet, kill and raise the event
        EnemyWaveKilled?.Invoke();
    }
}

In my other script's Start method, I try to subscribe to this event in this way:

public class GameController : MonoBehavior
{
    internal int PlayerLevel;

    private void Start()
    {
        _enemyController = GameObject.FindWithTag("Enemy").GetComponent<EnemyController>();
        _enemyController.EnemyWaveKilled += () => PlayerLevel++;
    }
}

I have 3 game objects all with tag Enemy in the scene.

Now, it seems that my GameController somehow randomly subscribes to the event.

To be more accurate, if I print EnemyWaveKilled.Target in my EnemyController class's Update() method, it displays one line saying it's GameController and two lines saying it's null )

Any help is much appreciated

Answer 1

I think I know what's happening. I have 3 objects with the same tag, but I'm only subscribing to one of them; that's why I see the two null values (and a single non- null value)