(New Input System) Check if .performed == null

Unity Engine
1

Is there any way to see if .performed has any methods in its invocation list? I want to do a simple check to see if there’s anything in it and add only if it’s empty.

if( _playerinputActions.Player.LMB.performed == null)
{
_playerinputActions.Player.LMB.performed += DoSomething;
}

This doesn’t work. I’m only starting to get into the new Input System, so there’s probably something I’m missing here.

2

Right now, not really, one way to do it would be to have a boolean on your side and only add callback if bool is false and then set bool to true.

3

I see. I looked at the input system, and the delegate attached to the event is private, so I can’t access it. Thanks anyway, I did it the way you described.