Passing a method through to a button's OnClick() listener?

Hey guys, I'm hoping someone on here might have some experience with Unity2D/4.6 UI elements. I'm building a system that procedurally generates random items, and loads them into a storefront system. I've got a barebones prefab which the script is filling - stats, image, etc etc. The problem is in filling the method to be called via the button's OnClick method.

Currently I've got the following script on it's parent container; note that the method being passed through is just a Debug.Log call, to see if the button is actually working.

Code (CSharp):

1.     Transform purchaseButton = newItem.transform.FindChild("Purchase");
2.         if (purchaseButton != null) {
3.             Debug.Log("found button");
4.             UnityEngine.Events.UnityAction action1 = () => { Debug.Log ("Got a button click"); };
5.             purchaseButton.GetComponent<Button>().onClick.AddListener(action1);
6.  
7.             Transform buttonText = purchaseButton.transform.FindChild("Text");
8.             buttonText.GetComponent<Text>().text = "Purchase " + itemNames;
9.         }

Altering the buttonText works fine and as expected; and obviously, I've no problem in finding the button object via the script. There's no compile-time, or run-time errors to speak of. However, try as I may, I can't pass through the new action into the onClick listener.

Can anyone lend me a hand, or some advice on this? I'd very much appreciate it

 

What is the code on the button?

 

There is no code attached to the button; it's set up with a blank onClick listener, and I'm looking to pass through the relevant code method via a parent object.

I've gotton event listener updating working fine on a script that's actually attached to the button itself; but if accessed from an external class, it seems to just.. not exist. No compile/run-time errors, debug.log shows that the correct method is being accessed.. but it just refuses to actually update the onClick method.