UKismetSystemLibrary::IsValidInterface

function Engine Blueprint Since 4.0

#include "Kismet/KismetSystemLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Checks whether an interface reference has a valid underlying object, for use with Blueprint interface function calls. Works for both natively and Blueprint-implemented interfaces.

Caveats & Gotchas

• This checks that the underlying object exists, not that the object implements every function of the interface with meaningful logic.
• Not marked ENGINE_API in the header, so it can't be called across DLL boundaries from external modules — call it from within Engine-linked code only.

Signature

static bool IsValidInterface(const FScriptInterface& Interface)

Parameters

Name	Type	Description	Default
Interface	const FScriptInterface&	The interface reference to check.	—

Return Type

bool

Example

Guard an interface call C++

if (UKismetSystemLibrary::IsValidInterface(InteractableInterface))
{
    IInteractable::Execute_Interact(Conv_InterfaceToObject(InteractableInterface), Instigator);
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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