UE4 class “UObject” 没有成员 “Beginplay”,“Tick”,是什么问题？

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

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

}