实现功能主要4个脚本：音乐源管理，资源加载，进度条SliderUI，音乐信息显示UI（prefab）
音乐源管理脚本：
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
using UnityEngine.Events;
using System;
public class Sound_demo : MonoBehaviour
{
AudioSource source;
RectTransform content;
SliderUI slider;//进度控制
Slider volume;//音量控制
int currentIndex = 0;//当前音频索引
// Use this for initialization
void Start()
{
source = this.GetComponent<AudioSource>();//获该脚本下的音频源组件
content = GameObject.Find("Content").GetComponent<RectTransform>();//找到Scroll View 下的Content 用来存放预设体
slider = GameObject.Find("Slider").GetComponent<SliderUI>();//获取进度条下的自定义SliderUI:Slider组件
volume = GameObject.Find("Volume").GetComponent<Slider>();//获取音量进度条
InitSoundList();//初始化播放列表
}
// Update is called once per frame
void Update()
{
//if (slider!=null&& source.isPlaying) {
// slider.value = source.time / Date_demo.Instance.clips[currentIndex].length;
//}
if (source == null || source.clip == null) return;
if (source.isPlaying && SliderUI.State == SliderState.Normal)
{
print("当前歌曲下标：" + currentIndex);
slider.value = source.time / source.clip.length;//进度条实时更新
//判断歌曲是否播放完毕，开始播放下一首
if (source.time>=source.clip.length*0.99f) {
OnPlayNext();
}
source.volume = volume.value;//音量实时更新
}
//拖拽滑块播放
if (SliderUI.State == SliderState.Up)
{
source.time = slider.value * source.clip.length;
slider.Reset();
}
}
void InitSoundList()
{
//根据加载的歌曲资源将其添加到播放列表中
for (var i = 0; i < Date_demo.Instance.clips.Length; i++)
{
AudioClip clip = Date_demo.Instance.clips[i];
GameObject Amusic = GameObject.Instantiate(Date_demo.Instance.prefabs, content);
//动态添加脚本
SoundItem item = Amusic.AddComponent<SoundItem>();
item.InitItemInfo(clip.name, clip.length, i);
item.AddListener(ToPlay);
}
}
//点击播放
private void ToPlay(int obj)
{
source.time = 0;
if (source.isPlaying)
{
source.Stop();
}
currentIndex = obj;
source.clip = Date_demo.Instance.clips[obj];
source.Play();
}
//播放暂停按钮
public void OnPlayPause()
{
if (source.isPlaying)
{
source.Pause();
return;
}
if (source.clip == null)
{
source.clip = Date_demo.Instance.clips[currentIndex];
}
source.Play();
}
//播放下一曲
public void OnPlayNext()
{
source.time = 0;
currentIndex++;
if (currentIndex >= Date_demo.Instance.clips.Length)
{
currentIndex = 0;
}
source.clip = Date_demo.Instance.clips[currentIndex];
source.Play();
}
//播放上一曲
public void OnPlayLast()
{
source.time = 0;
currentIndex--;
if (currentIndex<0) {
currentIndex = Date_demo.Instance.clips.Length - 1;
}
source.clip = Date_demo.Instance.clips[currentIndex];
source.Play();
}
}
资源加载脚本：
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Date_demo : MonoBehaviour {
public static Date_demo Instance;
[HideInInspector]
public AudioClip[] clips;
[HideInInspector]
public GameObject prefabs;
private void Awake()
{
Instance = this;
//加载Resources/Musics目录下的音频
clips = Resources.LoadAll<AudioClip>("Musics");
//加载Resources/Amusic目录下的预制体
prefabs = Resources.Load<GameObject>("Prefabs/Amusic");
}
// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
}
}进度条SliderUI:(重写Slider组件)
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public enum SliderState
{
Normal, Down, Up
}
public class SliderUI :Slider{
public static SliderState State = SliderState.Normal;//默认状态2，按下时候1，松开时候0
public override void OnPointerDown(UnityEngine.EventSystems.PointerEventData eventData)
{
base.OnPointerDown(eventData);
State = SliderState.Down;
print("按下");
}
public override void OnPointerUp(UnityEngine.EventSystems.PointerEventData eventData)
{
base.OnPointerUp(eventData);
State = SliderState.Up;
print("松开");
}
public void Reset() {
State = SliderState.Normal;
}
}音乐信息显示UI：（挂载在Prefab上）
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
//挂载每个音乐信息显示UI
public class SoundItem : MonoBehaviour {
//歌曲委托，index歌曲索引
public event System.Action<int> SOUNDPLAY;
//保存索引
private int index=-1;
private Text nameUI;
private Text timerUI;
private void Awake()
{
nameUI = transform.Find("name").GetComponent<Text>();
timerUI = transform.Find("time").GetComponent<Text>();
}
void Start () {
Button but = this.GetComponent<Button>();
but.onClick.AddListener(OnClick);
}
public void InitItemInfo(string soundName,float seconds,int index)
{
nameUI.text = soundName;
timerUI.text = getTime(seconds);
this.index = index;
}
//时间格式
private string getTime(float len) {
int f =(int) len/60;
int h = f / 60;
int s = (int)len % 60;
return /*(h < 10 ? "0" + h : h.ToString()) + ":" +*/ (f < 10 ? "0" + f : f.ToString()) + ":" + (s<10?"0"+s:s.ToString());
}
/// <summary>
/// 点击歌曲应该播放这首歌，触发歌曲播放事件
/// </summary>
private void OnClick() {
if(SOUNDPLAY!=null&&index!=-1)
SOUNDPLAY(index);
}
public void AddListener(System.Action<int> method) {
SOUNDPLAY += method;
}
}