一种不推荐的写法:

FActorSpawnParameters SpawnInfo;
SpawnInfo.Instigator = Instigator;  
SpawnInfo.ObjectFlags |= RF_Transient;  // We never want to save player controllers into a map
SpawnInfo.bDeferConstruction = true;
AMyPlayerController* NewPC = GetWorld()->SpawnActor<AMyPlayerController>(AMyPlayerController::StaticClass(), SpawnLocation, SpawnRotation, SpawnInfo);

参考自AGameMode::SpawnPlayerController()函数:

APlayerController* AGameMode::SpawnPlayerController(ENetRole RemoteRole, FVector const& SpawnLocation, FRotator const& SpawnRotation)
{
    FActorSpawnParameters SpawnInfo;
    SpawnInfo.Instigator = Instigator;  
    SpawnInfo.ObjectFlags |= RF_Transient;  // We never want to save player controllers into a map
    SpawnInfo.bDeferConstruction = true;
    APlayerController* NewPC = GetWorld()->SpawnActor<APlayerController>(PlayerControllerClass, SpawnLocation, SpawnRotation, SpawnInfo);
    if (NewPC)
    {
        if (RemoteRole == ROLE_SimulatedProxy)
        {
            // This is a local player because it has no authority/autonomous remote role
            NewPC->SetAsLocalPlayerController();
        }

        UGameplayStatics::FinishSpawningActor(NewPC, FTransform(SpawnRotation, SpawnLocation));
    }

    return NewPC;
}

推荐写法:

AMyPlayerController* PC = GetWorld()->SpawnActor<AMyPlayerController>(SpawnLoc, SpawnRot);

因为FActorSpawnParameters的参数非常多,如果自己设置,很可能有些参数设置不不正确导致不可预期的效果。