I've passed last 2 days reading articles and book for understand how can i make a plugin for iOS in Unity. Basically i need just a demo for understand how it work. For now i've tried to make this process (with really poor luck):

I've started a new project in Unity and writed a simple script

using UnityEngine;

using System.Collections;

using System;

using System.Runtime.InteropServices;



public class CallPlugin : MonoBehaviour {



    [DllImport ("__Internal")]

    private static extern int test();



    void Start () 

    {

        Debug.Log(test());

    }

}

Then i've created a project in Xcode with this simple script:

extern "C"{



    int test()

    {

       int che = 5;

        return che;

    }

}

Then i've tried:

to put the .mm and .h in the Assets/Plugins/iOS = nothing to build the unity project and than add the .h and .mm in the Xcode project = nothing

In Unity i will always get the EntryPointNotFoundException, so unity see the file but is unable to reach the method. The problem is... how?! :)

Maybe i miss something or i've done something wrong? Thanks a lot for every help that you can give me :)