EventSystem.lastSelectedGameObject is always null on some objects

Unity Engine
1

Hello, I recently updated to 4.6.1 from one of the betas, I can’t exactly remember which one (18-20?) and after the update, inside the callback of some button’s onClick event, EventSystem.lastSelectedGameObject is always null… Nothing was changed in the code or the scene form before I updated, it worked before just fine.

I receive the event in my callback ( all of the buttons’ callbacks are set dynamically ), but lastSelectedGameObject is always null.

Even when creating new buttons, with a simple Image component, i still get lastSelectedGameObject to be null. Events fire fine, but always with a null reference to lastSelectedGameObject or currentSelectedGameObject.

I then tried switching to EventTriggers, but the same thing happened. Callback called just fine, but
BaseEventData.selectedObject as well as EventSystem.lastSelectedGameObject are still null.

Does anyone know if there’s a gotcha popped up since the beta that I’m missing? Can’t seem to find any other way to refer to the object that was just clicked…

Thanks!

2

Can’t you just use Selection.gameObject?

3

Selection.gameObject is for the Editor. I’m talking about the runtime engine, with uGUI. :slight_smile:

I worked around it by messing with the source, ( made PointerInputModule.GetLastPointerEventData public ) but it would be nice to know why it won’t work.

4

@Harito I ran into the exact same problem as you did. Could you please explain what you did to fix it? Thanks.

5

I’m not sure if this was your issue, but mine was having more than one EventSystem component floating around in my scene.