How to determine which button triggered onClick Listener event

Unity Engine
1

I have an object that I want to instantiate that contains a button, and I want to spawn any number of them (number of objects is not constant). When the buttons are instantiated, I add ‘onClick.AddListener’ so I can call a function for when they’re clicked. But how do I determine which button called the event? Can I not just have one function that takes in a parameter, e.g. the index of the button in a list I create, to use to identify the button that called it? Because that doesn’t work. An example of what I’m trying to do:

Adding the listener:

buttons[i].onClick.AddListener(delegate { DeleteObject(index); });

And the function:

public void DeleteObject(int index)
{
    GameObject.Destroy(objects[index]);
}

However, for some reason this keeps destroying the object at the end of the list, and not at the index. So I can only assume whenever a new button is added it overrides the function with the new index. If so, what is the proper way to do this?

2

You’ve got the wrong forum, this is the 2D forum. The UI forum is here.

I’ll move your post for you.

3

Had the same problem some time ago. When you set the delegate it points to the same address in memory (I think?). Just use a temporary variable:

int temp = index;
buttons[i].onClick.AddListener(delegate { DeleteObject(temp); });

I think this should work.