Play Sound 2D

说明

使用C++实现:

1. 进入游戏时播放开始音效
   
2. 显示暂停和游戏结束窗口时出场音效
   

创建Sound Cue资产

• wav
  

  

  
  

• 创建Sound Cue
  

  

  
  

• 移动到Content/Sounds/UI
  

  

  
  

API导航

1. 播放Sound Cue
   
   Sound为空退出
   

   Copy 1/**
    2​ * Plays a sound directly with no attenuation, perfect for UI sounds.
    3 *
    4​ * * Fire and Forget.
    5​ * * Not Replicated.
    6​ * @param Sound - Sound to play.
    7​ * @param VolumeMultiplier - A linear scalar multiplied with the volume, in order to make the sound louder or softer.
    8​ * @param PitchMultiplier - A linear scalar multiplied with the pitch.
    9​ * @param StartTime - How far in to the sound to begin playback at
   10​ * @param ConcurrencySettings - Override concurrency settings package to play sound with
   11​ * @param OwningActor - The actor to use as the "owner" for concurrency settings purposes. 
   12 *						Allows PlaySound calls to do a concurrency limit per owner.
   13​ * @param bIsUISound - True if sound is UI related, else false
   14 */
   15UFUNCTION(BlueprintCallable, BlueprintCosmetic, Category="Audio", meta=( WorldContext="WorldContextObject", AdvancedDisplay = "2", UnsafeDuringActorConstruction = "true" ))
   16static void PlaySound2D(const UObject* WorldContextObject, USoundBase* Sound, float VolumeMultiplier = 1.f, float PitchMultiplier = 1.f, float StartTime = 0.f, USoundConcurrency* ConcurrencySettings = nullptr, const AActor* OwningActor = nullptr, bool bIsUISound = true);

2. USoundBase
   
   Sound Cue和Sound Wave的基类
   

   Copy 1/**
    2​ * The behavior of audio playback is defined within Sound Cues.
    3 */
    4UCLASS(hidecategories=object, BlueprintType, meta= (LoadBehavior = "LazyOnDemand"))
    5class ENGINE_API USoundCue : public USoundBase
    6{
    7    // ...
    8};
    9
   10UCLASS(hidecategories=Object, editinlinenew, BlueprintType, meta= (LoadBehavior = "LazyOnDemand"))
   11class ENGINE_API USoundWave : public USoundBase, public IAudioProxyDataFactory, public IInterface_AsyncCompilation
   12{
   13    // ...
   14};

播放游戏开始音效

1. 添加属性
   
   protected

ShootThemUp: Menu/UI/STUMenuWidget.h
   

   Copy1class USoundCue;
   2
   3UPROPERTY(EditDefaultsOnly, BlueprintReadWrite)
   4USoundCue *StartGameSound;

2. 点击按钮时播放
   
   ShootThemUp: Menu/UI/STUMenuWidget.cpp
   

   Copy1#include "Sound/SoundCue.h"
   2
   3// OnStartGame
   4UGameplayStatics::PlaySound2D(GetWorld(), StartGameSound);

窗口部件出场时播放音效

为窗口部件基类实现该功能

1. 添加属性
   
   protected

ShootThemUp: UI/STUBaseWidget.h
   

   Copy1class USoundCue;
   2
   3UPROPERTY(EditDefaultsOnly, BlueprintReadWrite)
   4USoundCue *OpenSound;

2. 添加接口
   
   public

ShootThemUp: UI/STUBaseWidget.h
   

   Copy1void PlayOpenSound();

   ShootThemUp: UI/STUBaseWidget.cpp
   

   Copy1#include "Sound/SoundCue.h"
   2#include "Kismet/GameplayStatics.h"
   3
   4void USTUBaseWidget::PlayOpenSound()
   5{
   6    UGameplayStatics::PlaySound2D(GetWorld(), OpenSound);
   7}

窗口部件出场时播放音效

ShootThemUp: UI/STUGameHUD.cpp

Copy1// OnMatchStateChanged
2
3if (CurrentWidget)
4{
5    CurrentWidget->Show();
6    CurrentWidget->PlayOpenSound();
7    CurrentWidget->SetVisibility(ESlateVisibility::Visible);
8}

设置对应Sound Cue资产

1. 游戏开始
   

   

   
   

2. 暂停
   

   

   
   

3. 结束