Interface defines in C++ can not be called in blueprint

Development Programming & Scripting C++
1 

#pragma once

#include "ItemActionsInterface.generated.h"

UINTERFACE(Blueprintable)
class UItemActionsInterface : public UInterface
{
	GENERATED_UINTERFACE_BODY()
};

class IItemActionsInterface
{
	GENERATED_IINTERFACE_BODY()

public:
	UFUNCTION(BlueprintNativeEvent, Category = "Pickup", meta = (DisplayName = "Pickup Item"))
	bool PickupItem(class AItemActor* InItemActor);

	UFUNCTION(BlueprintNativeEvent, Category = "Match", meta = (DisplayName = "Match Item"))
	bool MatchItem(int32 MatchType);
};




IItemActionsInterface::Execute_PickupItem(OtherActor, Item);

It is ok in C++. But can not find the Pickup Item in Blueprint Context Menu.
I was using Unreal Engine 4.12.3
I tried many methods, but all failed. I think this is a bug in engine.

2

The PickupItem(Message) is not appeared even after cast to ItemActionsInterface in Blueprint.

3

Interface created in Editor is all OK.

4

Have you tried making your interface UFunctions ‘BlueprintCallable’?

5

I have an C++ interface setup with BlueprintNativeEvent & BlueprintCallable.
Give this a try.

.h:



#pragma once

#include "ItemActionsInterface.generated.h"

UINTERFACE(Blueprintable)
class UItemActionsInterface : public UInterface
{
    GENERATED_UINTERFACE_BODY()
};

class IItemActionsInterface
{
    GENERATED_IINTERFACE_BODY()

public:
    UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "Pickup", meta = (DisplayName = "Pickup Item"))
    bool PickupItem(class AItemActor* InItemActor);

    UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "Match", meta = (DisplayName = "Match Item"))
    bool MatchItem(int32 MatchType);
};

.cpp:



// Copyright bla bla bla

#include "<YourGame>.h"
#include "ItemActionsInterface.h"

UItemActionsInterface::UItemActionsInterface(const FObjectInitializer& ObjectInitializer)
    : Super(ObjectInitializer)
{
}

bool IItemActionsInterface::PickupItem_Implementation(class AItemActor* InItemActor)
{
}

bool  IItemActionsInterface::MatchItem_Implementation(int32 MatchType)
{
}
6

Thank you, Kris.
BlueprintNativeEvent and BlueprintCallable can both exist. I just tried BlueprintCallable , but got a compiler error.