单例模式 单例模式的定义: 保证一个类只有一个实例,并提供一个访问它的全局访问点 通过一个简单的例子来了解单例模式的作用: class Div { constructor() { return document.createElement("div"); } } btn.addEventListener("click", function (event) { const div = new Div(); document.body.appendChild(div);
饿汉式单例 public class Singleton { private Singleton(){} private static Singleton instance = new Singleton(); public static Singleton getInstance(){ return instance; } } 懒汉式单例 public class Singleton { private static Singleton instance = null; private Sin
cocos2d-x lua 实现单例(管理类) version: cocos2d-x 3.6 示例代码 local DogManager = class("DogManager") -- other require local UserData = require("src/app/controller/UserData") DogManager.instance = nil function DogManager:getInstance() if not DogM