How can I expose a property in C++ to blueprint spawn-function?

Development Programming & Scripting
1

You have the ability to mark variables in blueprints to be exposed as a pin on spawn-functions.

Is this possible for C++ properties (UPROPERTY(…)) ?

1 Like
2

Any intel on this?

3

Hello, I ran into this issue today and was able to resolve it using “Meta=(ExposeOnSpawn=true)”

In my case the code was like so:

UPROPERTY(Replicated, EditAnywhere, BlueprintReadWrite, Meta = (DisplayName = "Caster", ExposeOnSpawn = true), Category = "Magic")
APawn* caster;

Hope that helps :slight_smile:

1 Like
4

Is there a way to ONLY expose it on spawn? I want to set a class type (TSubclassOf<>) during SpawnActorFromClass (Blueprint) but do not want access to that variable later on.

UPROPERTY(meta = (ExposeOnSpawn = “true”)) brings up LogCompile:Error: Property cannot have ‘ExposeOnSpawn’ with ‘BlueprintVisible’ flag.

I tried some combinations of keywords but did not get it to compile.

5

You must to put at least BlueprintVisible before to meta flag.

6

better late than never for an answer, this kind of UPROPERTY should go in public section of the class.
Something like

    	public:
    
    		UPROPERTY(BlueprintReadWrite, Meta = (ExposeOnSpawn = true))
    		int SelectionIndex;

works well where it failed while on private/protected

1 Like