[UE4]DYNAMIC_MULTICAST_DELEGATE

// button1 : BP에서 Delegate 호출해 BP, C++의 함수를 호출

// button2 : C++에서 Delegate 호출해 BP, C++의 함수를 호출

 

// EventGraph

 

// BP_Func함수는 로그만 출력만 함

 

 

 

// Header파일

#pragma once

#include "CoreMinimal.h"

#include "Blueprint/UserWidget.h"

#include "MyMulticastTest.generated.h"

// 인자이름 앞에 'F'를 붙여서 네이밍 해야함

DECLARE_DYNAMIC_MULTICAST_DELEGATE(FMulticastTest1);

DECLARE_DYNAMIC_MULTICAST_DELEGATE(FMulticastTest2);

 

UCLASS()

class PLUGIN_API UMyMulticastTest : public UUserWidget

{

GENERATED_BODY()

public:

UMyMulticastTest(const FObjectInitializer& ObjectInitializer);

 

UPROPERTY(BlueprintAssignable, VisibleAnywhere, BlueprintCallable, Category = "Event")

FMulticastTest1 fMulticast1;

 

UPROPERTY(BlueprintAssignable, VisibleAnywhere, BlueprintCallable, Category = "Event")

FMulticastTest2 fMulticast2;

 

UFUNCTION()

void CNativeFunc1();

 

UFUNCTION()

void CNativeFunc2();

UFUNCTION(BlueprintCallable, Category = "Event")

 

void ClickButton2();

};

 

 

// cpp

#include "MyMulticastTest.h"

UMyMulticastTest::UMyMulticastTest(const FObjectInitializer& ObjectInitializer)

:Super(ObjectInitializer)

{

fMulticast1.AddDynamic(this, &UMyMulticastTest::CNativeFunc1);

fMulticast2.AddDynamic(this, &UMyMulticastTest::CNativeFunc2);

}

void UMyMulticastTest::CNativeFunc1()

{

UE_LOG(LogTemp, Warning, TEXT("CNativeFunc1"));

GEngine->AddOnScreenDebugMessage(-1, 1.f, FColor::White, TEXT("CNativeFunc1"));

}

void UMyMulticastTest::CNativeFunc2()

{

UE_LOG(LogTemp, Warning, TEXT("CNativeFunc2"));

GEngine->AddOnScreenDebugMessage(-1, 1.f, FColor::White, TEXT("CNativeFunc2"));

}

void UMyMulticastTest::ClickButton2()

{

// Delegate 호출 : 등록된 BP 함수와 C++함수를 호출

fMulticast2.Broadcast();

}

 

// 결과

Button1, Button2순서로 눌렀을때 아래와 같이 출력됨