十五、UI音乐播放与调节

实现音乐播放，半实现进入游戏与加载存档

声明资源

SlAiMenuWidgetStyle.h

#include"SlateSound.h"
...
/*
	* 开始游戏声音
	*/
	UPROPERTY(EditAnywhere, Category = Sound)
		FSlateSound StartGameSound;

	/*
	* 结束游戏声音
	*/
	UPROPERTY(EditAnywhere, Category = Sound)
		FSlateSound ExitGameSound;

	/*
	* 转换按钮声音
	*/
	UPROPERTY(EditAnywhere, Category = Sound)
		FSlateSound MenuItemChangeSound;

	/*
	* Menu背景声音
	*/
	UPROPERTY(EditAnywhere, Category = Sound)
		FSlateSound MenuBackgroundMusic;

实时处理声音数据

调整音量是会实时更新。

SlAiHelper.h

#include"SlateApplication.h"
#include"TimerManager.h"

namespace SlAiHelper {
    
    

	
	
//播放声音并且延时调用UserClass的某个函数
	template<class UserClass>
	FORCEINLINE FTimerHandle PlaySoundAndCall(UWorld* World, const FSlateSound Sound,
		UserClass* InUserObject, typename FTimerDelegate::TRawMethodDelegate<UserClass>::FMethodPtr InMethod) 
	{
    
    
		FSlateApplication::Get().PlaySound(Sound);
		FTimerHandle Result;
		const float SoundDuration = FMath::Max(FSlateApplication::Get().GetSoundDuration(Sound), 0.1f);
		FTimerDelegate Callback;
		Callback.BindRaw(InUserObject, InMethod);
		World->GetTimerManager().SetTimer(Result, Callback, SoundDuration, false);
		return Result;
	}
}

SlAiDataHandle.h

public:
	
	//修改菜单音量
	void ResetMenuVolume(float MusicVal, float SoundVal);

	//初始化Menu声音数据
	void InitializeMenuAudio();

private:
	//保存Menu的声音
	TMap<FString, TArray<class USoundCue*>> MenuAudioResource;
};

SlAiDataHandle.cpp

...
#include"Sound/SoundCue.h"

SlAiDataHandle::SlAiDataHandle()
{
    
    
	//初始化存档数据
	InitRecordData();
	//初始化Menu声音数据
	InitializeMenuAudio();
}


void SlAiDataHandle::ResetMenuVolume(float MusicVal, float SoundVal)
{
    
    
	if (MusicVal > 0)
	{
    
    
		MusicVolume = MusicVal;
		
		//循环设置背景音乐
		for (TArray<USoundCue*>::TIterator It(MenuAudioResource.Find(FString("Music"))->CreateIterator()); It; ++It)
		{
    
    
			//设置音量
			(*It)->VolumeMultiplier = MusicVolume;
		}
	}
	if (SoundVal > 0)
	{
    
    
		SoundVolume = SoundVal;
		
		//循环设置音效
		for (TArray<USoundCue*>::TIterator It(MenuAudioResource.Find(FString("Sound"))->CreateIterator()); It; ++It)
		{
    
    
			//指针的指针
			(*It)->VolumeMultiplier = SoundVolume;
		}
	}
	//更新存档数据
	SlAiSingleton<SlAiJsonHandle>::Get()->UpdateRecordData(GetEnumValueAsString<ECultureTeam>(FString("ECultureTeam"),
		CurrentCulture), MusicVolume, SoundVolume, &RecordDataList);
}
...
void SlAiDataHandle::InitializeMenuAudio()
{
    
    
	//添加资源文件到资源列表
	TArray<USoundCue*> MusicList;
	MusicList.Add(Cast<USoundCue>(SlAiStyle::GetMenuStyle()->MenuBackgroundMusic.GetResourceObject()));

	TArray<USoundCue*> SoundList;
	SoundList.Add(Cast<USoundCue>(SlAiStyle::GetMenuStyle()->StartGameSound.GetResourceObject()));
	SoundList.Add(Cast<USoundCue>(SlAiStyle::GetMenuStyle()->ExitGameSound.GetResourceObject()));
	SoundList.Add(Cast<USoundCue>(SlAiStyle::GetMenuStyle()->MenuItemChangeSound.GetResourceObject()));

	//添加资源到Map
	MenuAudioResource.Add(FString("Music"), MusicList);
	MenuAudioResource.Add(FString("Sound"), SoundList);

	//重置一下声音
	ResetMenuVolume(MusicVolume, SoundVolume);
}

退出游戏，半实现进入游戏，加载存档

新地图未创建

...
private:
	//退出游戏
	void QuitGame();
	//进入游戏
	void EnterGame();
	
};

...
#include"SlAiMenuController.h"
#include"Kismet/GameplayStatics.h"
#include"SlAiHelper.h"

BEGIN_SLATE_FUNCTION_BUILD_OPTIMIZATION
void SSlAiMenuWidget::Construct(const FArguments& InArgs)
{
    
    

	//播放背景音乐
	FSlateApplication::Get().PlaySound(SlAiStyle::GetMenuStyle()->MenuBackgroundMusic);

	
	InitializeMenuList();
	InitializeAnimation();
}


END_SLATE_FUNCTION_BUILD_OPTIMIZATION


void SSlAiMenuWidget::MenuItemOnClicked(EMenuItem::Type ItemType)
{
    
    
	...
	case EMenuItem::QuitGame:
		//退出游戏,播放声音并且延时调用退出函数
		SlAiHelper::PlaySoundAndCall(UGameplayStatics::GetPlayerController(GWorld, 0)->GetWorld(), SlAiStyle::GetMenuStyle()->ExitGameSound, this, &SSlAiMenuWidget::QuitGame);

		...
		
	case EMenuItem::EnterGame:
		
		SlAiHelper::PlaySoundAndCall(UGameplayStatics::GetPlayerController(GWorld, 0)->GetWorld(), 
				SlAiStyle::GetMenuStyle()->StartGameSound, this, &SSlAiMenuWidget::EnterGame);
		
		break;
	case EMenuItem::EnterRecord:
		
		SlAiHelper::PlaySoundAndCall(UGameplayStatics::GetPlayerController(GWorld, 0)->GetWorld(), 
				SlAiStyle::GetMenuStyle()->StartGameSound, this, &SSlAiMenuWidget::EnterGame);
		break;
	}
}

void SSlAiMenuWidget::ChangeCulture(ECultureTeam Culture)
{
    
    
	SlAiDataHandle::Get()->ChangeLocalzationCulture(Culture);
}

void SSlAiMenuWidget::ChangVolume(const float MusicVal, const float SoundVal)
{
    
    
	SlAiDataHandle::Get()->ResetMenuVolume(MusicVal, SoundVal);
}


void SSlAiMenuWidget::PlayClose(EMenuType::Type NewMenu)
{
    
    
	//设置新的界面
	CurrentMenu = NewMenu;
	//设置新高度
	CurrentHeight = (*MenuMap.Find(NewMenu))->MenuHeight;
	//设置播放状态是Close
	AnimState = EMenuAnim::Close;
	//播放反向动画
	MenuAnimation.PlayReverse(this->AsShared());
	//播放切换菜单音乐
	FSlateApplication::Get().PlaySound(SlAiStyle::GetMenuStyle()->MenuItemChangeSound);
}

//退出游戏
void SSlAiMenuWidget::QuitGame()
{
    
    
	Cast<ASlAiMenuController>(UGameplayStatics::GetPlayerController(GWorld, 0))->ConsoleCommand("quit");
}

//进入游戏
void SSlAiMenuWidget::EnterGame()
{
    
    
	SlAiHelper::Debug(FString("EnterGame"), 10.f);
	//解锁按钮
	ControlLocked = false;
}

点击进入存档后打印EnterGame