User Widget Expose on spawn doesn´t work

Development Programming & Scripting
1

Hi.

This is a bug that I can see since a long time ago.

I have a UserWidget, with a custom property marked as “Expose on spawn” and “editable”

Here you can see i´m adding pawn (current player) reference, so it´s impossible to have it empty, as he is the one creating the widget.

Intermediately created, if you try to read property “Heroe Base Actual” will be null… it´s like exposed on spawn fields are not took in consideration, but just for user widgets, for blueprints work ok.

Also, If I set SELF as a second step using the ReturnValue.HeroeBaseActual = self, it works ok, it just fails while using it on expose on spawn.

202838-exposeonspawn.jpg

Am I doing something wrong or is this a bug?

2

Checking my old questions, I can see this is already solved in the engine, it was a bug indeed.

3

I’ve just came across this bug on UE 4.22.3. Still not fixed.

4

Tested today 09.2020 in 4.25, still not getting “Expose on spawn” properties passed to widget. Bug still exists after years or i am doing something wrong?

5

Can confirm. Still some weird/undefined behaviour when trying to use “Expose On Spawn”-set variables inside the Construction Script of a widget. Sometimes it actually seems to work, and then it starts failing again without touching it (e.g. after restarting the engine/editor) .

6

We have encountered this problem when a coworker misused the listview widget, so there is a chance that you may still observe this problem if listview items were set in the wrong way. Listview never uses a user-created widget, it gets an object and it creates its widget itself. these links may be helpful about how to use listview in Unreal. blueprints - How do I add custom data to a ListView widget in Unreal? - Game Development Stack Exchange Listview - getting started in BP

2 Likes
7

+1 Same issue in 4.25.4

Exposed on Spawn Variable won’t be accessible in event “On Initialized”. Adding a 1 frame delay solves the issue, but then other functionality needs a 2 frames delay and this scales up…

1 Like
9

+1 Same issue in 4.27.2

10

+1 Same issue in 5.3.2

11

+1 5.3.2

unable to get spawn parameters in ‘Event On Initialized’.