一：目的

游戏音频的播放在任何游戏中都占据非常重要的地位，音频的播放可以分为两种，一种为游戏音乐，另一种为游戏音效。前者适用于较长的音乐，如游戏背景音乐。第二种适用于比较短的游戏音乐，如开枪瞬间的音效
在Unity中有两个关于音频的重要组件：AudioListener和AudioSource，通过AudioListener进行监听，AudioSource进行播放

所以我们需要一个管理器统一管理音频的相关操作

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二：解决的问题及优点

——音效的播放、暂停、继续、静音
——背景音乐的播放、暂停、继续、静音、渐隐

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三：使用方法

——将所有音频文件统一放在Resources文件夹下的Sounds文件夹下
——使用SoundMgr.Ins.XXX

SoundMgr.Ins.PlayBGM("bgm");
SoundMgr.Ins.PlaySound("coin");
SoundMgr.Ins.StopPlay();
SoundMgr.Ins.PausePlay();
SoundMgr.Ins.BGMFade(2);

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四：代码实现

using UnityEngine;/// <summary>
/// 音频管理器
/// </summary>
public class SoundMgr : MonoSingleton<SoundMgr>
{public const string SoundDir = "Sounds/";//音频目录//BGM播放器private AudioSource bgmPlayer;public AudioSource BgmPlayer { get { return bgmPlayer; } }//音效播放器private AudioSource soundPlayer;public AudioSource SoundPlayer { get { return soundPlayer; } }//是否全局静音public bool IsGlobalMute { get { return bgmPlayer.mute && soundPlayer.mute; } }public override void Awake(){base.Awake();if (bgmPlayer == null){bgmPlayer = gameObject.AddComponent<AudioSource>();bgmPlayer.loop = true;bgmPlayer.playOnAwake = false;bgmPlayer.mute = false;}if (soundPlayer == null){soundPlayer = gameObject.AddComponent<AudioSource>();soundPlayer.loop = false;soundPlayer.playOnAwake = false;soundPlayer.mute = false;}}#region Interface/// <summary>/// 播放音效/// </summary>public void PlaySound(string soundName, float volume = 1, bool loop = false){AudioClip clip = Resources.Load<AudioClip>(SoundDir + soundName);if (clip == null){Debug.LogError("没有此音频：" + soundName);return;}soundPlayer.clip = clip;soundPlayer.volume = volume;soundPlayer.loop = loop;soundPlayer.Play();}/// <summary>/// 播放背景音乐/// </summary>public void PlayBGM(string bgmName, float volume = 1, bool loop = true){AudioClip clip = Resources.Load<AudioClip>(SoundDir + bgmName);if (clip == null){Debug.LogError("没有此音频：" + bgmName);return;}bgmPlayer.clip = clip;bgmPlayer.volume = volume;bgmPlayer.loop = loop;bgmPlayer.Play();}/// <summary>/// 背景音乐渐隐/// </summary>public void FadeBGM(float fadeDuration){bgmFade = true;bgmFadeBeginTime = Time.realtimeSinceStartup;bgmFadeBeginVolume = bgmPlayer.volume;bgmFadeDuration = fadeDuration;}/// <summary>/// 暂停播放/// </summary>public void PausePlay(){bgmPlayer.Pause();soundPlayer.Pause();}/// <summary>/// 继续播放/// </summary>public void ResumePlay(){bgmPlayer.Play();soundPlayer.Play();}/// <summary>/// 停止播放/// </summary>public void StopPlay(){bgmPlayer.Stop();soundPlayer.Stop();}/// <summary>/// 设置静音状态/// </summary>public void SetMuteState(bool b){bgmPlayer.mute = b;soundPlayer.mute = b;}/// <summary>/// 设置BGM静音状态/// </summary>public void SetBgmMuteState(bool b){bgmPlayer.mute = b;}/// <summary>/// 设置Sound静音状态/// </summary>public void SetSoundMuteState(bool b){soundPlayer.mute = b;}/// <summary>/// 停止播放BGM/// </summary>public void StopPlayBGM(){bgmPlayer.Stop();}/// <summary>/// 暂停播放BGM/// </summary>public void PausePlayBGM(){bgmPlayer.Pause();}/// <summary>/// 继续播放BGM/// </summary>public void ResumePlayBGM(){bgmPlayer.Play();}/// <summary>/// 停止播放音效/// </summary>public void StopPlaySound(){soundPlayer.Stop();}#endregion#region Toolsprivate bool bgmFade;//背景音乐是否渐隐private float bgmFadeBeginVolume;//背景音乐渐隐开始时的音量private float bgmFadeBeginTime;//背景音乐渐隐开始的时间private float bgmFadeDuration;//背景音乐渐隐的时间private void Update(){if (bgmFade){float delta = Time.realtimeSinceStartup - bgmFadeBeginTime;if (delta <= bgmFadeDuration){bgmPlayer.volume = Mathf.Lerp(bgmFadeBeginVolume, 0, delta / bgmFadeDuration);}else{bgmFade = false;bgmPlayer.volume = 0;}}}#endregion
}