PrepareMapChange/CommitMapChange delete actors

Development Programming & Scripting C++
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1

Hi,

I need to keep the instance of my gameMode between levels.
After a bit of research i use PrepareMapChange/CommitMapChange, it works as intended but when changing levels,
the actors of the previous one are not garbage collected.
So all the previous actors, light, bsp are still up.

Should i destroy them manually ?

this is the code i got now.

The event that change level, when enterring in a “Hole”

void ■■■■■::OnBeginOverlap(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult & SweepResult) {

	OurParticleSystem->Activate(false);
	AudioComp->Activate(false);
	if(OtherActor->GetClass()->IsChildOf(ABall::StaticClass())){
        ((ATwitchTestGameMode*)GetWorld()->GetAuthGameMode())->destroyActors();
		((ATwitchTestGameMode*)GetWorld()->GetAuthGameMode())->loadMaps();
	}
}

in ATwitchTestGameMode i have 2 method: destoryActors and loadmaps

void ATwitchTestGameMode::destroyActors()
{
	for (TActorIterator<AActor> ActorItr(GetWorld()); ActorItr; ++ActorItr)
	{
		AActor *actor = *ActorItr;
		UE_LOG(LogTemp, Warning, TEXT("Actors: %s"),*(actor->GetName()));
		//actor->Destroy();
	}
}

void ATwitchTestGameMode::loadMaps()
{
	TArray<FName> loader;
	incrementLevel();
	loader.Add(FName(*levels[level]));
	GetWorld()->PrepareMapChange(loader);
	displayWinningScreen();

	FTimerHandle timer;
	GetWorld()->GetTimerManager().SetTimer(timer, this, &ATwitchTestGameMode::resetLevel, timeScreen, false);

	//if (GetWorld()->IsMapChangeReady) {
	GetWorld()->CommitMapChange();
}

Then i have a bit of code in the PostCommitMapChange() callback method

I don’t know why the actors are not deleted when swapping levels.
I don’t know if GetWorld()->CommitMapChange(); is blocking untill GetWorld()->IsMapChangeReady return true.
If not should i block the execution and avoiding a while loop ?

Do you think deleted all the actors before swapping is the good aproach and avoiding the gamemode?

Thanks