38,关卡管理器初始化改为c++

整体方案总结（AMyLevelManager）

架构目标

1. BeginPlay在 C++ 完成初始化逻辑，获取 GameInstance、PostProcessVolume、播放背景音乐、开启定时器。

2. TimeCount 是纯 C++ 普通成员函数，不暴露给蓝图，定时器触发 TimeCount。

3. TimeCount（C++ 内部）调用子函数TimerSubLogic；仅子函数支持蓝图重写，C++ 提供默认实现。

4. 背景音乐资源StageLevelSound暴露到蓝图细节面板，编辑器直接选音效，无需改代码。

5. 
   UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = “Audio”)
   USoundBase* StageLevelSound = nullptr;
   UPROPERTY(BlueprintReadWrite, Category = “LevelManager”)
   UMyGameInstance* gameIns = nullptr;

   UPROPERTY(BlueprintReadWrite, Category = “LevelManager”)
   APostProcessVolume* pp = nullptr;
   FTimerHandle TimerHandle_level;
   void TimeCount();
   // 扩展入口：蓝图 / C++ 均可重写，
   UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = “LevelManager”)
   void TimerSubLogic();
   virtual void TimerSubLogic_Implementation() {}

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

gameIns = Cast<UMyGameInstance>(UGameplayStatics::GetGameInstance(GetWorld())); if (!gameIns) { return; } pp = Cast<APostProcessVolume>(UGameplayStatics::GetActorOfClass(GetWorld(), APostProcessVolume::StaticClass())); SoundManagement(StageLevelSound); GetWorldTimerManager().SetTimer(TimerHandle_level, this, &AMyLevelManager::TimeCount, 1.0f, true);

}

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

}

void AMyLevelManager::TimeCount()
{
TimerSubLogic();
}