IMPLEMENT MONOSINGLETON

To complete this Game Based Example, complete these three steps...

1. Create a MonoSingleton Script

2. Create a SpawnManager Script that utilizes the MonoSingleton Design Pattern

3. Access the SpawnManager from the GameManager

STEP ONE

OBJECTIVE: CREATE A MONOSINGLETON SCRIPT

public abstract class MonoSingleton<T> : MonoBehaviour where T : MonoSingleton<T>
{
    private static T _instance;
    public static T Instance
    {
        get
        {
            if(_instance == null)
                Debug.Log(typeof(T).ToString() + " is NULL");
                
            return _instance;
        }
    }
    
    private void Awake()
    {
        _instance = (T)this;
        
        Init();
    }
    
    public virtual void Init()
    {
        //optinal to override
    }
}

STEP TWO

OBJECTIVE: Create a SpawnManager Script that utilizes the MonoSingleton Design Pattern

public class SpawnManager : MonoSingleton<SpawnManager>
{
    public override void Init()
    {
        base.Init();
        Debug.Log("SpawnManager Initialized!");
    }
    
    public void DisplayName()
    {
        Debug.Log("My name is Jordan.");
    }
}

CODE BREAKDOWN

There is no need to declare this script as a Singleton class as it is being forced to gain the MonoSingleton properties with SpawnManager replacing the Type Parameter within the MonoSingleton Script.

STEP THREE

OBJECTIVE: Access the SpawnManager from the GameManager

public class GameManager: MonoBehaviour
{   
    private void Start()
    {
        SpawnManager.Instance.DisplayName();
    }
}

CODE BREAKDOWN

With only a few lines of code from within the GameManager script and the SpawnManager script, the program can easily access public methods from each script.