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assets/seripts/managers/MusicManager.ts

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+/**
+ * 游戏开发者：程序员加菲猫
+ * 游戏名称：Like A Dino!
+ */
+
+import { _decorator, Component, AudioClip } from "cc";
+import { EventDispatcher } from "../libs/EventDispatcher";
+import { SpeedAudioPlayer } from "../libs/SpeedAudioPlayer";
+import { GlobalData } from "../config/GlobalData";
+
+const { ccclass, property } = _decorator;
+
+@ccclass("MusicManager")
+export class MusicManager extends Component {
+  //音频播放器
+  private audioPlayer: SpeedAudioPlayer = null;
+
+  //音频剪辑列表
+  @property({
+    type: [AudioClip],
+    tooltip: "音频剪辑列表",
+  })
+  audioClips: AudioClip[] = [];
+
+  //当前选择的音频剪辑索引
+  private currentAudioClipIndex: number = 0;
+
+  async onLoad() {
+    //设置当前选择的音频剪辑
+    this.currentAudioClipIndex = GlobalData.selectedMusicID - 1;
+    //初始化音频播放器
+    this.audioPlayer = new SpeedAudioPlayer();
+    //初始化音频
+    await this.audioPlayer.init(this.audioClips[this.currentAudioClipIndex]);
+  }
+
+  start() {
+    //监听游戏暂停事件
+    EventDispatcher.getTarget().on(
+      EventDispatcher.GAME_PAUSE,
+      this.pause,
+      this,
+    );
+    //监听游戏继续事件
+    EventDispatcher.getTarget().on(
+      EventDispatcher.GAME_RESUME,
+      this.resume,
+      this,
+    );
+    //监听游戏结束事件
+    EventDispatcher.getTarget().on(EventDispatcher.GAME_OVER, this.stop, this);
+  }
+
+  //播放音乐
+  async play() {
+    //播放之前判断是否需要切换音频
+    if (this.currentAudioClipIndex !== GlobalData.selectedMusicID - 1) {
+      //切换音频
+      this.currentAudioClipIndex = GlobalData.selectedMusicID - 1;
+      //初始化音频
+      await this.audioPlayer.changeAudioClip(
+        this.audioClips[this.currentAudioClipIndex],
+      );
+    }
+    // 初始速率播放
+    this.audioPlayer.play(GlobalData.speedRate);
+    // 设置初始音量
+    this.audioPlayer.setVolume(1.0);
+  }
+
+  //暂停音乐
+  pause() {
+    this.audioPlayer.pause();
+  }
+
+  //停止音乐
+  stop() {
+    this.audioPlayer.stop();
+  }
+
+  //继续播放音乐
+  resume() {
+    this.audioPlayer.resume();
+  }
+
+  update(deltaTime: number) {}
+}