SingletonBase.cs Reusable Singleton Pattern for Unity
SingletonBase.cs — A Reusable Singleton Pattern for Unity
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A lightweight, generic Singleton pattern for Unity that ensures only one instance of a manager or system exists at a time.
It automatically handles duplicates, optional scene persistence, and lazy initialization — perfect for Game Managers, Audio Managers, and other global controllers.
✨ Features
Generic and reusable — works for any MonoBehaviour type
- Thread-safe lazy access pattern
- Auto-creates an instance if missing
- Optional “Don’t Destroy On Load” behavior
- Automatically removes duplicates
🧰 How to Use
1️⃣ Add SingletonBase.cs to your project (or import the included Unity package).
2️⃣ Create a new class that inherits from it, for example:
public class AudioManager : SingletonBase<AudioManager>
{
public void PlayClick() => Debug.Log("Click Sound Played");
}
3️⃣ Access your manager from anywhere:
AudioManager.Instance.PlayClick();
4️⃣ (Optional) Enable “Don’t Destroy On Load” in the Inspector to keep it between scenes.
🧠 Example
public class GameManager : SingletonBase<GameManager>
{
public int CurrentScore { get; private set; }
public void AddScore(int value)
{
CurrentScore += value;
Debug.Log($"Score updated: {CurrentScore}");
}
}
Use it like this:
GameManager.Instance.AddScore(100);
📦 What’s Included
- SingletonBase.cs — Source code
- SingletonBase.unitypackage — Ready-to-import Unity package
✅ Tested with Unity 2021 LTS and newer
🔧 License: MIT — free for personal and commercial use
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