Unity 音乐播放管理器

MonoSingleton

using UnityEngine;
public class MonoSingleton<T> : MonoBehaviour where T : MonoBehaviour
{
    private static T instance;

    public static T Instance
    {
        get
        {
            if (instance == null)
            {
                // 查找存在的实例
                instance = (T)FindObjectOfType(typeof(T));

                // 如果不存在实例，则创建
                if (instance == null)
                {
                    // 需要创建一个游戏对象，再把这个单例组件挂载到游戏对象上
                    var singletonObject = new GameObject();
                    instance = singletonObject.AddComponent<T>();
                    singletonObject.name = typeof(T).ToString() + " (Singleton)";

                    // 让实例不在切换场景时销毁
                    DontDestroyOnLoad(singletonObject);
                }
            }

            return instance;
        }
    }
}

音乐播放管理器

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[System.Serializable]
public class MusicList
{
    public string listName;
    public List<AudioClip> clips;
}

[System.Serializable]
public class MusicPlayer
{
    public string playerName;
    public AudioSource source;
    public List<AudioClip> musicList;
    public int index;

    [Header("只读")]
    public bool isPlaying;
    public bool IsPlaying => source.isPlaying;

    public MusicPlayer(string playerName, AudioSource source, List<AudioClip> musicList, int index)
    {
        this.playerName = playerName;
        this.source = source;
        this.musicList = musicList;
        this.index = index;
    }

    public void UpdateStatus()
    {
        isPlaying = IsPlaying;
    }
}

public class MusicManager : MonoSingleton<MusicManager>
{
    public List<MusicList> musicLists;

    AudioClip GetAudioClip(string listName,int index)
    {
        foreach (var i in musicLists)
        {
            if (i.listName == listName)
            {
                return i.clips[index];
            }
        }
        return null;
    }

    public List<MusicPlayer> players;

    public MusicPlayer GetMusicPlayer(string playerName)
    {
        foreach (var i in players)
        {
            if (i.playerName == playerName)
            {
                return i;
            }
        }
        return null;
    }

    void RegisterMusicPlayer(string listName, int index, int volume, bool playRightNow, bool loop)
    {
        GameObject obj = new GameObject(listName);
        obj.transform.SetParent(transform);

        AudioSource source = obj.AddComponent<AudioSource>();

        foreach (var i in musicLists)
        {
            if (i.listName == listName)
            {
                source.clip = i.clips[index];
                source.volume = volume;
                source.playOnAwake = false;
                source.loop = loop;
                MusicPlayer player = new MusicPlayer(listName, source, i.clips, index);
                players.Add(player);

                if (playRightNow)
                    PlayMusic(listName);
            }
        }
    }

    public void PlayMusic(string playerName)
    {
        foreach (var i in players)
        {
            if (i.playerName == playerName)
            {
                i.source.Play();
                i.UpdateStatus();
            }
        }
    }

    public void PauseMusic(string playerName)
    {
        foreach (var i in players)
        {
            if (i.playerName == playerName)
            {
                i.source.Pause();
                i.UpdateStatus();
            }
        }
    }

    public void SetVolume(string playerName,float volume)
    {
        foreach (var i in players)
        {
            if (i.playerName == playerName)
            {
                i.source.volume = volume;
            }
        }
    }

    public void PlayNextMusic(string playerName)
    {
        foreach (var i in players)
        {
            if (i.playerName == playerName)
            {
                i.index++;
                if (i.index >= i.musicList.Count)
                    i.index = 0;
                i.source.clip = GetAudioClip(playerName, i.index);
                i.source.Play();
            }
        }
    }

    public void PlayLastMusic(string playerName)
    {
        foreach (var i in players)
        {
            if (i.playerName == playerName)
            {
                i.index--;
                if (i.index < 0)
                    i.index = i.musicList.Count - 1;
                i.source.clip = GetAudioClip(playerName, i.index);
                i.source.Play();
            }
        }
    }

    void Start()
    {
        RegisterMusicPlayer("BackgroundMusic", 0, 1, true, true);
        RegisterMusicPlayer("EnvironmentMusic", 0, 1, false, true);
    }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.RightArrow))
        {
            PlayNextMusic("BackgroundMusic");
        }

        if (Input.GetKeyDown(KeyCode.LeftArrow))
        {
            PlayLastMusic("BackgroundMusic");
        }

        if (Input.GetKeyDown(KeyCode.UpArrow))
        {
            PlayMusic("BackgroundMusic");
        }

        if (Input.GetKeyDown(KeyCode.DownArrow))
        {
            PauseMusic("BackgroundMusic");
        }
    }
}

使用方法

在音乐列表添加音乐

然后使用脚本提供的API，注册播放器并使用

效果