[UE4]多播代理

1. 第一种

DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FReceiveDelegateEvent, FString, Value1, FString, Value2);

UPROPERTY(BlueprintAssignable, Category = "Event")
FReceiveDelegateEvent  ReceiveDelegateEvent;
UFUNCTION(BlueprintCallable, Category = "My|MyActor")
void BroadcastToBluePrint(FString value1, FString value2);

void AMyActor::BroadcastToBluePrint(FString value1, FString value2)
{
　　this->ReceiveDelegateEvent.Broadcast(value1, value2);
}

2.第二种

.h

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

#pragma once  

#include "UObject/NoExportTypes.h"
#include "Kismet/BlueprintAsyncActionBase.h"
#include "MyObject.generated.h"  

/**
 *
 */
UCLASS()
class TTTTT_API UMyObject : public UBlueprintAsyncActionBase
{
    GENERATED_BODY()  

public:  

    DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FTestDelegate, FString, Content, int32, StatusCode);  

    UFUNCTION(BlueprintCallable, Category = "MyObject")
        static UMyObject* DDDelegate(FString url,  FString Content);  

    UPROPERTY(BlueprintAssignable)
        FTestDelegate OnSuccess;  

    UPROPERTY(BlueprintAssignable)
        FTestDelegate OnFail;
private:
    void DDUseDelegate(bool bSucceeded);
};  

.cpp

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

#include "TTTTT.h"
#include "MyObject.h"  

UMyObject* UMyObject::DDDelegate(FString url, FString Content)
{
    UMyObject* Helper = NewObject<UMyObject>();  

    return Helper;
}  

void UMyObject::DDUseDelegate(bool bSucceeded)
{
    if (bSucceeded)
    {
        OnSuccess.Broadcast("",);
    }
    else
    {
        OnFail.Broadcast("", );
    }
}