Interface Won't Compile

Development Programming & Scripting UI
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1

I’m just trying to get a very basic very straight forward interface with two methods OnGrab and OnRelease working in c++. I feel like this shouldn’t be that hard to do.

This is my header currently

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "Grabbable.generated.h"

/**
 * 
 */
UINTERFACE(MinimalAPI)
class GODGAME_API UGrabbable : public UInterface
{
	GENERATED_UINTERFACE_BODY()	
};

class IGrabbable
{
	GENERATED_IINTERFACE_BODY()
};

and my .cpp

// Fill out your copyright notice in the Description page of Project Settings.

#include "GodGame.h"
#include "Grabbable.h"

first error in the compiler

Error D:\Unreal\GodGame\Source\GodGame\Public\Grabbable.h(13) : error C2487: ‘GetPrivateStaticClass’: member of dll interface class may not be declared with dll interface

I’ve now looked at 4 different tutorials online dealing with C++ interfaces in unreal and they all point to roughly this structure but I can’t get it to compile for the life of me. I’ve even tried just doing it in a totally clean project with no luck. Ideally I want this interface to be usable in blueprints but I’m considering that secondary to getting it usable at all. What am I doing wrong here?

2

I think i figured it out

this is my header file now

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "Grabbable.generated.h"

/**
 * 
 */
UINTERFACE(MinimalAPI)
class UGrabbable : public UInterface
{
	GENERATED_UINTERFACE_BODY()	
};

class IGrabbable
{
	GENERATED_IINTERFACE_BODY()

public:
	virtual void OnGrab();

	virtual void OnRelease();
};

and this is my source file

// Fill out your copyright notice in the Description page of Project Settings.

#include "GodGame.h"
#include "Grabbable.h"


UGrabbable::UGrabbable(const class FObjectInitializer& PCIP)
	: Super(PCIP)
{

}

void IGrabbable::OnGrab()
{

}


void IGrabbable::OnRelease()
{

}

it compiles but time will only tell if it actually works XD