10_24/Test10_24/assets/Scripts/UIFrameWork/UIEventManager.ts

import { _decorator, Component, Node, EventTarget } from 'cc';
const { ccclass, property } = _decorator;

@ccclass('UIEventManager')
export class UIEventManager extends EventTarget {
    private static _instance: UIEventManager;
    constructor() {
        super();
        if (UIEventManager._instance) {
            // 如果实例已存在，返回这个实例
            return UIEventManager._instance;
        }
        UIEventManager._instance = this;
    }

    public static getInstance(): UIEventManager {
        if (!UIEventManager._instance) {
            UIEventManager._instance = new UIEventManager();
        }
        return UIEventManager._instance;
    }
}