TiaoQi.cpp:

#include "TiaoQiWidget.h"
void ATiaoQi::setWidget(UTiaoQiWidget* w) { //在控件蓝图中调用，参数为self即可。
    widget = w; //之后即可调用widget->humanFinish();
}

播放wav格式音效

.h

UCLASS()
class UNREALTIAOQI_API ATiaoQi : public APawn
{
    GENERATED_BODY()
public:
    USoundWave* jumpSoundWave[6];
    ATiaoQi();
    void playSound();
}

.cpp

#include "Sound/SoundWave.h"
const FString jumpSound[5] = { 
TEXT("/Script/Engine.SoundWave'/Game/soundFX/Jump/s1.s1'"), 
TEXT("/Script/Engine.SoundWave'/Game/soundFX/Jump/s2.s2'"), 
TEXT("/Script/Engine.SoundWave'/Game/soundFX/Jump/s3.s3'"),						 
TEXT("/Script/Engine.SoundWave'/Game/soundFX/Jump/s4.s4'"),
TEXT("/Script/Engine.SoundWave'/Game/soundFX/Jump/s5.s5'") };

const FString nextStepSound[5] = {
TEXT("/Script/Engine.SoundWave'/Game/soundFX/humanNextStep/button01_mp3.button01_mp3'"),
TEXT("/Script/Engine.SoundWave'/Game/soundFX/humanNextStep/button03_mp3.button03_mp3'"),
TEXT("/Script/Engine.SoundWave'/Game/soundFX/humanNextStep/button04_mp3.button04_mp3'"),
TEXT("/Script/Engine.SoundWave'/Game/soundFX/humanNextStep/button05_mp3.button05_mp3'"),
TEXT("/Script/Engine.SoundWave'/Game/soundFX/humanNextStep/button06_mp3.button06_mp3'") };

ATiaoQi::ATiaoQi() {
    for (int i = 0; i < 5; ++i) {
        ConstructorHelpers::FObjectFinder<USoundWave> jumpSoundObject(*jumpSound[i]);
        jumpSoundWave[i] = jumpSoundObject.Object;
    }
}
void ATiaoQi::playSound(){
    const FVector3d T = ...; // 发声地点，省略具体值。
    UGameplayStatics::PlaySoundAtLocation(this, jumpSoundWave[FMath::RandRange(0, 4)], T);
    //下面这种动态载入方式也可以
    USoundWave* HitSound = LoadObject<USoundWave>(this, *nextStepSound[FMath::RandRange(0,4)]); 
    //下面这种是直接发声，无关具体位置。
    if (HitSound) {UGameplayStatics::PlaySound2D(GetWorld(), HitSound);}
}