Creating callback in C# for player respawn

Unity Engine
1

Hello, how can i make callback in C# which is called on player respawn? For example i have teleport script where player is teleported on spawn with decrease value for lives by 1. On this step i want callback for example OnPlayerRespawn which i can call from another script. I need this to set SetActive to true for certain object which player destroy and on respawn i want to setactive to true back. Thanks a lot for your help and time.

2

Events - Unity Learn ?

3

Yea, thanks, events, that what i looking for. But now i must learn how can i make this eventmanager to call my function on specific time (onrespawnplayer)

4

i create in TeleportScript this

public class CollisionStateTeleportToStart : AbstractClass
{
    public delegate void RespawnAction();
    public static event RespawnAction OnRespawn;

and in specific line i put OnRespawn() in teleportscript and on another script where i want to use event, it looks like

void Test()
    {
        SceneManager.LoadScene("LevelSelector");
    }

    private void OnEnable()
    {
        CollisionStateTeleportToStart.RespawnAction += Test;
    }

    private void OnDisable()
    {
        CollisionStateTeleportToStart.RespawnAction -= Test;
    }

but error is CollisionStateTeleportToStart.RespawnAction is a type but its used like a variable. How to use it properly please? im working firs time with events

5

… big mistake, i call type as error said :smile: i need to call OnRespawn. It works now :slight_smile: thanks a lot

6

but one question more, why sometimes my script throw nullreferenceexception when i call OnRespawn() in script where i define event?

NullReferenceException: Object reference not set to an instance of an object
CollisionStateTeleportToStart.TeleportToStart () (at Assets/Scripts/Collision/CollisionStateTeleportToStart.cs:221)

public void TeleportToStart()
    {
        OnRespawn();
        restartCount++;
        textScore.text = restartCount.ToString();
        transform.position = spawnLocation;
        kamera.position = CameraRestartPoint;

        foreach (MoveObject item in moveObject)
        {
            item.ResetPositions();
        }

        foreach (var item in restartOnDeath)
        {

line 221 is OnRespawn();

7

problem solved via checking if OnRespawn != null and add listener to OnStart and not in OnEnable;