How to Send GameObject[] in Event System

Questions & Answers
1

Hi, I’ve got code that needs access to a list of gameobjects for reference. Although, I am quite new to event systems, and don’t know how to pass parameters through to listeners.

I have to errors with the code below, including:

  • CS0123, No overload for 'OnClick' matches delegate 'Action'
  • CS1593, Delegate 'Action' does not take 1 arguments

GameEvents.cs

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

public class GameEvents : MonoBehaviour
{
    public static GameEvents current;
    public GameObject[] SubSettingMenus;

    void Awake()
    {
        current = this;
    }

    public event Action OnClick;
    public void Click()
    {
        if (OnClick != null)
        {
            OnClick(SubSettingMenus); //CS0123
        }
    }
}

ChangeSubSettingsMenu.cs

using System.Collections;
using System.Collections.Generic;
using System.Data;
using UnityEngine;
using UnityEngine.UI;
//using UnityEngine.UIElements;

public class ChangeSubSettingsMenu : MonoBehaviour
{
    void Start()
    {
        GameEvents.current.OnClick += OnClick; //CS1593
    }

    void OnClick(GameObject[] SubSettingMenus)
    {

    }
}
2

You’d have to create a custom event handler to pass the parameter something like:

public class GameEvents : MonoBehaviour
{
    public static GameEvents current;

    public delegate void OnClickHandler(GameObject[] gameObjects);
    public event OnClickHandler OnClick;

    public void Click()
      {
          OnClick?.Invoke(SubSettingMenus);
      }
}

Then subscribe to the event:

public class ChangeSubSettingsMenu : MonoBehaviour
{
  void OnEnable(){
    GameEvents.current.OnClickHandler += OnClick;
  }
}