C# interfaces tutorial

Unity Engine
1

Hey guys, I was wondering if there was a generally regaurded best tutorial out there for implementing C# interfaces in unity. I am aware of various C# programming books and sites that touch on the subject of interfaces, however I am really interested in a tutorial or example that shows it’s implementation inside unity and not in purely example code.

Thanks so much!

2

check out burgzergarcade.com

he recently did some c# tutorials on interfaces
link

1 Like
3 
//the interface
public interface iThing 
{
	bool exposedWhatever {get;set;}
	bool exposedAndSetfromEditor {get;set;}
	void DoSomething(int number);
}

//a class that you will access via the interface.

public class SpecificThing : MonoBehaviour, iThing 
{
	//Properties can be exposed via Interfaces
	public bool exposedWhatever {get;set;}
	
	//But a variable cannot be
	public int publicButNotVia_iThing;
	
	//Too bad you can't set properties with the Unity Editor
	//Just do this:
	public bool _exposedAndSetfromEditor;
	public bool exposedAndSetfromEditor {get{return _exposedAndSetfromEditor;} set {_exposedAndSetfromEditor = value;}}
	//_exposedAndSetfromEditor can be set in the editor and you can work with exposedAndSetfromEditor via the interface
	
	//work with methods as usual.	
	public void DoSomething(int number)
	{
		publicButNotVia_iThing = number * 1000000;
	}
	
}

//If you are working with interfaces in unity you are probably getting stuff off of instantiated objects.
//Despite what some "vocal" members of the community claim; you can use GetComponent to retrieve your interfaces.
//I've been doing it since 2010 on PC, Webplayer, and Android - no performance impact and no errors.
//But you do have to use the string overload. It would be nice to get better Interface support from Unity.

//Finally, Code that needed to access different classes via an interface

public class MainLoop : MonoBehaviour
{
	Start()
	{
		//Okay - getting tired of writing this, use your imagination
		//Obtain your target "other" gameobject that has some script that uses your interface.
		other = GameObject.Find("TheThingGameObject");
		iThing thing = (iThing)other.GetComponent("iThing");
		//And do what you need.
		thing.exposedWhatever = false;
		thing.DoSomething(10);
	}

}
3 Likes
4

Just in case anyone’s interested in serializing/exposing interfaces (or any abstract object in general), check out VFW

5

Did you check the interface tutorial in the learn section?

6

How can I put that type of file into a Game Object? When I try to put it in to the Game Object, i says that it’s class can’t be abstract. HELP ME, PLS!!

7

Please share the code that you are using, and the error text.