Integrating ios Unity 3d into ios source code

Check it:

http://docs.unity3d.com/Manual/PluginsForIOS.html

In short: Start over with a simple class, say FooPlugin.cs in Unity3D

, that does the following:

[DllImport ("__Internal")]
private static extern float _FooPluginFunction();

      

        
        
        
      

    

which has a public method:

public static void FooPluginFunction()
{
    _FooPluginFunction(); // call the native extension
}

      

        
        
        
      

    

Then create an XCode project and add FooPlugin.m that implements this method:

void FooPluginFunction() {
   // this is where native world is met
}