How do I access the instance of a script held by a GameObject?

Questions & Answers
1

I am putting myself through learning Unity atm and I got an issue. I have a class GameVariablesController. That is only a C# Script. This is supposed to hold all game variables that need to be saved. Now I want to access them. However, I am not sure how to do this. In Game Maker Studio, I would make an Object, add it to the scene and access this one via the game object list. So I tried to do the same in Unity.

For finding the GameObject, I need to search for it and GameObject.Find(); returns me the object. However, it does not contain the definitions for the functions the script is holding. So my question is, how do I access the instance of that script? I am not quite sure how this works in Unity.

2

If there’s only one instance of that script in the scene, you can simply use

GameVariablesController gvc = FindObjectOfType<GameVariablesController>();

It saves you from finding the bearer.
The component has to be on a game object in the scene though.

3

To add to the answer @UnityCoach has given, I am using this singleton to solve the issueusing

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

//---------------------------------------------
public class GameVariablesController
//---------------------------------------------
{
	//---------------------------------------------
	// Private Members
	//---------------------------------------------
	private static GameVariablesController instance = null;
	private static readonly object padlock = new Object();

	//---------------------------------------------
	// Public Members
	//---------------------------------------------
	public float playerShipMaxSpeed		{get;set;}
	public float playerBulletMaxSpeed 	{get; set;}

	//---------------------------------------------
	GameVariablesController()
	//---------------------------------------------
	{
		playerShipMaxSpeed = 40;
		playerBulletMaxSpeed = 900;
	}

	//---------------------------------------------
	public static GameVariablesController Instance
	//---------------------------------------------
	{
		get
		{
			lock(padlock)
			{
				if ( instance == null )
				{
					instance = new GameVariablesController();
				}
				return instance;
			}
		}
	}		
}