MRTK V2 - How to access Receivers?

Question

At the beginning of my scene I set up all my OnClick- and OnFocus-Listeners (which you see in the code snippet at the end of this post). As I'm using the given mrtk-prefab-buttons, which have the Interactable script on them, there is already under Receivers an InteractableOnFocusReceiver, you see in the screenshot below.



My issue:
By adding an receiver (via the code below), everything works fine, but I get these message:



I guess this happens because there is already a OnFocusReceiver and I'm adding another one or I missing some extra data/component. So I tried to access somehow the OnFocusReceiver that already exists, but could not find a way to achieve that. Trying comp.GetReceiver<InteractableOnFocusReceiver>(); is giving me null even though in the unity editor I see a OnFocusReceiver. Does sb know how to access this receiver so I can just add to it another trigger-method?

public static void ManageListenerForFocus(
    bool addReceiver, 
    Interactable comp, 
    Listener methodForFocusEnter, 
    Listener methodForFocusExit)
{
    var onFocusReceiver = comp.AddReceiver<InteractableOnFocusReceiver>();

    if (addReceiver)
    {
        onFocusReceiver.OnFocusOn.AddListener(() => methodForFocusEnter(comp));
        onFocusReceiver.OnFocusOff.AddListener(() => methodForFocusExit(comp));
    }
    else
    {
        onFocusReceiver.OnFocusOn.RemoveListener(() => methodForFocusEnter(comp));
        onFocusReceiver.OnFocusOff.RemoveListener(() => methodForFocusExit(comp));
    }
}

public static void ManageListenerForClicks(
    bool addListener,
    Interactable comp,
    UnityAction actionForOnClick)
{
    if (addListener)
        comp.OnClick.AddListener(actionForOnClick);
    else
        comp.OnClick.RemoveListener(actionForOnClick);
}

Answer 1

To add a method for OnFocusReceiver on runtime, you just need to add a listener to the existing receiver:

    var onFocusReceiver = gameObject.GetComponent<Interactable>().GetReceiver<InteractableOnFocusReceiver>();
    onFocusReceiver.OnFocusOn.AddListener(() => Debug.Log("ONtest"));
    onFocusReceiver.OnFocusOff.AddListener(() => Debug.Log("OFFtest"));