加入服务定位器模式 | add Service Locator Pattern

加入服务定位器模式 | add Service Locator Pattern

Author: QianMo

Assets/Game Programming Patterns/Service Locator Pattern.meta

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+//-------------------------------------------------------------------------------------
+//	ServiceLocatorPatternExample.cs
+//-------------------------------------------------------------------------------------
+
+using UnityEngine;
+using System.Collections;
+using System;
+
+namespace ServiceLocatorPatternExample
+{
+ public class ServiceLocatorPatternExample : MonoBehaviour
+ {
+ void Start()
+ {
+ //注册到服务定位器
+ TheAudioPlayer audio = new TheAudioPlayer();
+ ServiceLocator.RegisterService(audio);
+ }
+
+ void Update()
+ {
+ //播放声音
+ if (Input.GetKeyDown(KeyCode.Alpha1))
+ {
+ var audio=ServiceLocator.GetAudioService();
+ if (audio!=null)
+ {
+ audio.PlaySound(1);
+ }
+ }
+
+ //结束声音
+ if (Input.GetKeyDown(KeyCode.Alpha2))
+ {
+ var audio = ServiceLocator.GetAudioService();
+ if (audio != null)
+ {
+ audio.StopSound(1);
+ }
+ }
+
+ //结束所有声音
+ if (Input.GetKeyDown(KeyCode.Alpha3))
+ {
+ var audio = ServiceLocator.GetAudioService();
+ if (audio != null)
+ {
+ audio.StopAllSounds();
+ }
+ }
+
+ //注册日志音频类
+ if (Input.GetKeyDown(KeyCode.Alpha4))
+ {
+ ServiceLocator.EnableAudioLogging();
+ }
+ }
+
+
+ }
+
+
+
+ /// <summary>
+ /// 服务定位器管理类
+ /// </summary>
+ public class ServiceLocator
+ {
+ static IAudio AudioService_;
+ static NullAudio NullAudioService_;
+
+ public static IAudio GetAudioService() { return AudioService_; }
+
+ /// <summary>
+ /// 注册服务
+ /// </summary>
+ /// <param name="service"></param>
+ public static void RegisterService(IAudio service)
+ {
+ if (service == null)
+ {
+ // Revert to null service.
+ AudioService_ = NullAudioService_;
+ }
+ else
+ {
+ AudioService_ = service;
+ }
+ Debug.Log("[ServiceLocator]Finish Register Service!");
+ }
+
+ /// <summary>
+ /// 注册带日志的音频类
+ /// </summary>
+ public static void EnableAudioLogging()
+ {
+ // Decorate the existing service.
+ IAudio service = new LoggedAudio(ServiceLocator.GetAudioService());
+
+ // Swap it in.
+ RegisterService(service);
+ }
+
+ }
+
+
+
+ /// <summary>
+ ///音频接口 
+ /// </summary>
+ public interface IAudio
+ {
+ void PlaySound(int soundID);
+ void StopSound(int soundID);
+ void StopAllSounds();
+ };
+
+ /// <summary>
+ /// 实际的播放音频的实现类
+ /// </summary>
+ public class TheAudioPlayer : IAudio
+ {
+ public void PlaySound(int soundID)
+ {
+ // Play sound using console audio api...
+ Debug.Log("Play Sound ! ID = "+soundID.ToString());
+ }
+
+ public void StopSound(int soundID)
+ {
+ // Stop sound using console audio api...
+ Debug.Log("Stop Sound ! ID = " + soundID.ToString());
+ }
+
+ public void StopAllSounds()
+ {
+ // Stop all sounds using console audio api...
+ Debug.Log("Stop All Sound ! ");
+ }
+ };
+
+ /// <summary>
+ /// null音频类
+ /// </summary>
+ public class NullAudio : IAudio
+ {
+ public void PlaySound(int soundID) { /* Do nothing. */ }
+ public void StopSound(int soundID) { /* Do nothing. */ }
+ public void StopAllSounds() { /* Do nothing. */ }
+ };
+
+ /// <summary>
+ /// 带日志的音频类
+ /// </summary>
+ class LoggedAudio : IAudio
+ {
+
+ IAudio wrapped_;
+ public LoggedAudio(IAudio wrapped)
+ {
+ wrapped_ = wrapped;
+ }
+
+ public void PlaySound(int soundID)
+ {
+ Log("[LoggedAudio]Play sound!");
+ wrapped_.PlaySound(soundID);
+ }
+
+ public void StopSound(int soundID)
+ {
+ Log("[LoggedAudio]Stop sound!");
+ wrapped_.StopSound(soundID);
+ }
+
+ public void StopAllSounds()
+ {
+ Log("[LoggedAudio]Stop all sounds!");
+ wrapped_.StopAllSounds();
+ }
+
+ private void Log(string message)
+ {
+ Debug.LogError(message);
+ // Code to log message...
+ }
+ }
+
+
+
+}
+
+
+