Question How to store anonymous method reference for future use?

Hello,

This is the dynamic UI button creation from prefab example:

Code (CSharp):

1. private void CreateItemDisplay(MyItem item)
2. {
3.     var obj = Instantiate(ItemDisplayPrefab, ContentPanel);
4.     obj.Button.onClick.AddListener(() => { OnItemClick(item); });
5. }

If at some other point in time I want to unsubscribe from onClick how can I remove the listener if I dont have a reference to this anonymous method?

 

Code (CSharp):

1. Action myListener = () => { OnItemClick(item); };

Then use the "myListener" variable as desired.

 

If you end up lifting that delegate out of the function and instead passing it in, keep in mind the concept of variable capture, applicable wherever you call this such as from within a loop.

Delegate / Action variable capture / value capture:

https://forum.unity.com/threads/dyn...s-with-parameter-passing.974346/#post-6334800

 

You mean I need to write it like this, if I have an array of these actions and want to store them for future use?

Code (CSharp):

1. private void CreateItemDisplay(MyItem item)
2. {
3.     var obj = Instantiate(ItemDisplayPrefab, ContentPanel);
4.     UnityAction action = () => { var myItem = item; OnItemClick(myItem); };
5.     obj.Button.onClick.AddListener(action);
6.     itemClickActions.Add(obj, action);
7. }