UE4中添加异步蓝图节点（定时节点）

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

#pragma once

#include "CoreMinimal.h"
#include "Kismet/BlueprintAsyncActionBase.h"
#include "BlueprintAsyncNode.generated.h"

DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FBlueprintAsyncNodePinResult, int32, Result);

/**
 * 
 */
UCLASS()
class UECPP_API UBlueprintAsyncNode : public UBlueprintAsyncActionBase
{
	GENERATED_BODY()

	UPROPERTY(BlueprintAssignable)
	FBlueprintAsyncNodePinResult OnSuccess;

	UFUNCTION(BlueprintCallable, meta = (BlueprintInternalUseOnly = "true", WorldContext = "WorldContextObject", Delay = "0.5"))
	static UBlueprintAsyncNode* AsyncDelay(UObject* WorldContextObject, float Delay);

protected:
	void TimeoutCallback();
};

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

#include "BlueprintAsyncNode.h"
#include <Engine/World.h>
#include <TimerManager.h>

UBlueprintAsyncNode* UBlueprintAsyncNode::AsyncDelay(UObject* WorldContextObject, float Delay)
{
	UBlueprintAsyncNode* Node = NewObject<UBlueprintAsyncNode>();
	//构建定时器
	FTimerHandle Handle;
	WorldContextObject->GetWorld()->GetTimerManager().SetTimer(Handle, FTimerDelegate::CreateUObject(Node, &UBlueprintAsyncNode::TimeoutCallback), Delay, false);
	return Node;
}

void UBlueprintAsyncNode::TimeoutCallback()
{
	if (OnSuccess.IsBound())
	{
		OnSuccess.Broadcast(10);
	}
}