Singleton Toolbox compile error

Questions & Answers
1

I’m trying to use the Toolbox Singleton implementation you can find here: http://wiki.unity3d.com/index.php/Toolbox

From my main game controller I’m trying to register my map loader component in the following way:

using UnityEngine;
using System.Collections;
    
public class MainGameController : MonoBehaviour {
    
    void Awake(){
        Screen.SetResolution (Screen.height, Screen.width, true);
        MapLoader mLoader = Toolbox.Instance.RegisterComponent<MapLoader>();
    }
}

But in the console window of unity I get the following compile error:

Assets/Scripts/MainGameController.cs(11,54):
error CS0176: Static member
`Toolbox.RegisterComponent()’ cannot
be accessed with an instance
reference, qualify it with a type name
instead

I’m not really experienced with unity game dev nor with C# generics, so I can’t find what I’m doing wrong.

This is the map loader class

using UnityEngine;
using System.Collections;

[System.Serializable]
public class MapLoader {

	private ArrayList tilesInstances = new ArrayList();

	public ArrayList TilesInstances
	{
		get { return tilesInstances; }
	}

	private void LoadMap()
	{
		//Do some stuff
	}

}
2

The error is quite clear what you did wrong. Just have a look at the declaration of the RegisterComponent method:

static public T RegisterComponent<T> () where T: Component {
    return Instance.GetOrAddComponent<T>();
}

The method is a static method, not an instance method. So you just have to use:

MapLoader mLoader = Toolbox.RegisterComponent<MapLoader>();

As you can see the method RegisterComponent uses the “Instance” property internally to access the singleton instance. That method is just a shortcut for:

Toolbox.Instance.GetOrAddComponent<MapLoader>();
// is the same as:
//Toolbox.RegisterComponent<MapLoader>();
3

@shadowking I seem to have resolved this through much trial and error. The issue I had was the example implementation writes:

MyComponent myComponent = Toolbox.Instance.RegisterComponent<MyComponent>();

But it worked once I changed this too (removing the ‘Instance’ request):

MyComponent myComponent = Toolbox.RegisterComponent<MyComponent>();