Unsolvable issue with System.Action and IEnumerator

I have 2 scripts. One in UnityScript called Calling.js, another in C# called DelegateHandler.cs, here are the two scripts:

Calling.js:

Code (JavaScript):

1.  function Awake ()
2.     {
3.         var myHandler : DelegateHandler = DelegateHandler.Get().OnEvent(Callback);
4.         myHandler.TryHandler();
5.     }
6.    
7.     function Callback( _string : String ) : IEnumerator
8.     {
9.         //yield WaitForSeconds(1);
10.         print("value = "  + _string);
11.     }
12.  

And DelegateHandler.cs:

Code (CSharp):

1.  public class DelegateHandler : MonoBehaviour
2.     {
3.         public static System.Action<string> callbackAction;
4.    
5.         public static DelegateHandler  Get()
6.         {
7.             DelegateHandler delegateHandler = GameObject.Find ("Main Camera").AddComponent<DelegateHandler>();
8.             return delegateHandler;
9.         }
10.    
11.    
12.         public DelegateHandler  OnEvent( System.Action<string> _callback)
13.         {
14.             callbackAction = _callback;
15.             return this;
16.         }
17.    
18.         public void TryHandler()
19.         {
20.              callbackAction("test") ;
21.         }
22.        
23.     }

I need OnEvent to be DelegateHandler typed.

Problem is: If I uncomment the yield WaitForSeconds(1) on the .js , the Callback function is never called.

I've searched for hours for workaround with delegates() , abstract methods and everything but I can't find anything to make this work... I think I have teared enough hair of my head to make myself a new wig!

Any help/hints would be really apreciated

 

My first thought (not knowing about Unitys internal handling of IEnumerator) is that maybe (and I know I read somewhere but can't remember where) unitys lack of support for actions and events is the possible cause for it not being called after the yield line. My first thought for a solution is to create another method (for the ienumerator) and call startcoroutine on that inside the action callback. Might work? hope this helps!

 

Yeap, I already tried with success something like this

Code (JavaScript):

1. function Callback( _string : String )
2.    {
3.        CallbackFake( _string );
4.    }
5.  
6. function CallbackFake( _string : String ) : IEnumerator
7.    {
8.       yield WaitForSeconds(1);
9.        print("value = " + _string)
10.    }

But I want to avoid it. And just have one real callback function

 

Solution here: http://answers.unity3d.com/questions/808463/unsolvable-issue-with-systemaction-and-ienumerator.html

 

try to use invoke function insteads of yield WaitForSeconds

 

Why would I do such a thing?