team2_fs/assets/Scripts/Main/SoundSystem.ts

import { _decorator, Component, Node, game, find } from 'cc';
import { Sound } from '../core/sound/Sound';
const { ccclass, property } = _decorator;

@ccclass('SoundSystem')
export class SoundSystem extends Component {
    private static thisObject: SoundSystem;
    start() {
        SoundSystem.thisObject = this;
        game.addPersistRootNode(this.node);
    }
    public static play(index: number) {
        this.thisObject.getComponent(Sound).play(index);
    }
    public static stop() {
        this.thisObject && this.thisObject.getComponent(Sound).stop();
    }
    public static setVolume(value: number) {
        this.thisObject.getComponent(Sound).volume = value;
    }
}