Unity中，不继承MonoBehaviour的类使用Mono的相关功能
实现一个单例MonoSys，外部调用它。MonoSys自己维护一个MonoController。
using System;using System.Collections;using System.Collections.Generic;using UnityEngine;using UnityEngine.SceneManagement;public class MonoController : MonoBehaviour{ public event Action ApplicationPauseEvent; public event Action ApplicationQuitEvent; public event Action UpdateEvent; public event Action<Scene, LoadSceneMode> SceneChangedEvent; private void OnEnable() { SceneManager.sceneLoaded += OnSceneLoaded; } private void OnDisable() { SceneManager.sceneLoaded -= OnSceneLoaded; } private void OnApplicationPause(bool pauseStatus) { if (pauseStatus) { ApplicationPauseEvent?.Invoke(); } } private void OnApplicationQuit() { ApplicationQuitEvent?.Invoke(); } private void Update() { UpdateEvent?.Invoke(); } private void OnSceneLoaded(Scene scene, LoadSceneMode mode) { SceneChangedEvent?.Invoke(scene, mode); }}public class MonoSys{ private static MonoSys _instance; public static MonoSys Instance { get { if (_instance == null) { _instance = new MonoSys(); } return _instance; } } private MonoController _monoController; private MonoSys() { var parentGo = GameObject.Find("Singleton"); if (parentGo == null) { parentGo = new GameObject("Singleton"); UnityEngine.Object.DontDestroyOnLoad(parentGo); } GameObject go = new GameObject(nameof(MonoController)); go.transform.SetParent(parentGo.transform); _monoController = go.AddComponent<MonoController>(); } public Coroutine StartCoroutine(IEnumerator routine) { return _monoController.StartCoroutine(routine); } public void StopCoroutine(IEnumerator routine) { _monoController.StopCoroutine(routine); } public void AddApplicationQuitEvent(Action action) { _monoController.ApplicationQuitEvent += action; } public void RemoveApplicationQuitEvent(Action action) { _monoController.ApplicationQuitEvent -= action; } public void AddApplicationPauseEvent(Action action) { _monoController.ApplicationPauseEvent += action; } public void RemoveApplicationPauseEvent(Action action) { _monoController.ApplicationPauseEvent -= action; } public void AddUpdateEvent(Action action) { _monoController.UpdateEvent += action; } public void RemoveUpdateEvent(Action action) { _monoController.UpdateEvent -= action; } public void AddSceneChangedEvent(Action<Scene, LoadSceneMode> action) { _monoController.SceneChangedEvent += action; } public void RemoveSceneChangedEvent(Action<Scene, LoadSceneMode> action) { _monoController.SceneChangedEvent -= action; }}
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