Creating Manager classes with Singleton pattern

2 min readAug 8, 2021

A GameManager is in meant to deal with stuff such as loading scenes. A way to communicate with it is using GetComponent method, but now we will use the Singleton pattern

When to use it?

When working with managers like AudioManager, GameManager, UIManager

Process

Create this line of code. It is private because we don’t want it to be modified outside

private static GameManager _instance;

Create a public static property. It will be accessed from outside and return the _instance value

public static GameManager Instance
{
    get
    {
        if (_instance == null)
        {
            Debug.LogError("GameManager is null");
        }
        return _instance;
    }
}

Set the _instance value in Awake

private void Awake()
{
    _instance = this;
}

Why is it good?

Because it ensures there will be only 1 instance of the class
Also, the public class and its static variables can be accessed easily from any other class
Static variables are stored in memory

Example
Let’s say we have a bool hasCard in GameManager.csAn approach is