UE C++延迟调用实现（LatentAction方法）

.h:

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "Runtime/Engine/Classes/Kismet/KismetSystemLibrary.h"  
#include "MyActor.generated.h"

UCLASS()
class MYPROJECT_API AMyActor : public AActor
{
   
    GENERATED_BODY()

public:    
    // Sets default values for this actor's properties
    AMyActor();

private:
    UFUNCTION()
        void OnLatentActionCompleted(int32 LinkID);

protected:
    // Called when the game starts or when spawned
    virtual void BeginPlay() override;
public:    
    // Called every frame
    virtual void Tick(float DeltaTime) override;
}

.cpp:

#include "MyActor.h"

// Sets default values
AMyActor::AMyActor()
{
   
     // Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
    PrimaryActorTick.bCanEverTick = true;

}

void AMyActor::OnLatentActionCompleted(int32 LinkID)
{
   
    UE_LOG(LogTemp, Log, TEXT("Delay Invoke!"));
}

// Called when the game starts or when spawned
void AMyActor::BeginPlay()
{
   
    Super::BeginPlay();

    FLatentActionInfo Ret(0, GetTypeHash(FGuid::NewGuid()), TEXT("OnLatentActionCompleted"), this);
    UKismetSystemLibrary::Delay(this, 3.0, Ret);
    //延迟3秒后，调用函数名为OnLatentActionCompleted的函数
}

// Called every frame
void AMyActor::Tick(float DeltaTime)
{
   
    Super::Tick(DeltaTime);
}