Unity http请求封装（www）

项目中需要经常访问后台，以任何需求都只写一遍代码的想法决定对www进行一下封装，目的即是让程序在每个访问后台的入口保持唯一，同时可以自己定制回调函数，处理每一个访问http请求：

首先看了其他网友的文章，访问www方法如下：

WWW __request = new WWW(__url);

yield return __request;if(string.IsNullOrEmpty(__request.error)){   //doing something}else{   //doing something}

首先我希望访问http方法要是单例，但是如果用协程的方法（yield）必须要继承MonoBehaviour,所以先写一个继承MonoBehaviour的单例

public class _InstanceMonoBehaviour<T> : MonoBehaviour where T : MonoBehaviour  

...

然后写一个访问http的单例类

////  HttpTool.cs//  EndlessRunner////  Created by jiabl on 09/06/2017.////using System.Collections;using System.Collections.Generic;using UnityEngine;public delegate void HttpRequestEventHandle(string __request);/// <summary>/// Http tool./// 当需要请求http的时候调用Request方法/// 例子：/// HttpTool.Instance.Request("www.baidu.com",new HttpRequestEventHandle(myfunc))/// void myfunc(string str) {do something]/// </summary>public class HttpTool : _InstanceMonoBehaviour<HttpTool> {/// <summary>/// http请求/// </summary>/// <param name="url">URL.</param>/// <param name="fa">Fa.</param>/// public void Request(string __url,HttpRequestEventHandle __eventHandle){StartCoroutine(httpRequest(__url,__eventHandle));}/// <summary>/// Request the specified __url, __eventHandleForComplete and __eventHandleForError./// </summary>/// <param name="__url">URL.</param>/// <param name="__eventHandleForComplete">Event handle for complete.</param>/// <param name="__eventHandleForError">Event handle for error.</param>public void Request(string __url,HttpRequestEventHandle __eventHandleForComplete,HttpRequestEventHandle __eventHandleForError){StartCoroutine(httpRequest(__url,__eventHandleForComplete,__eventHandleForError));}/// <summary>/// Https the request./// </summary>/// <returns>The request.</returns>/// <param name="url">URL.</param>public IEnumerator httpRequest(string __url,HttpRequestEventHandle __eventHandle){WWW __request = new WWW(__url);yield return __request;if(string.IsNullOrEmpty(__request.error)){onHttpRequestCompleted(__request.text,__eventHandle);}else{Debug.Log("<====== http request error! =======> info: url=>"+__url+" request error: "+__request.error);}}/// <summary>/// Https the request./// </summary>/// <returns>The request.</returns>/// <param name="__url">URL.</param>/// <param name="__eventHandleForComplete">Event handle for complete.</param>/// <param name="__eventHandleForError">Event handle for error.</param>public IEnumerator httpRequest(string __url,HttpRequestEventHandle __eventHandleForComplete,HttpRequestEventHandle __eventHandleForError){WWW __request = new WWW(__url);yield return __request;if(string.IsNullOrEmpty(__request.error)){onHttpRequestCompleted(__request.text,__eventHandleForComplete);}else{onHttpRequestFailed(__request.text,__eventHandleForError);Debug.Log("<====== http request error! =======> info: url=>"+__url+" request error: "+__request.error);}}/// <summary>/// http请求后的回调方法./// </summary>/// <param name="__requestText">Request text.</param>/// <param name="__eventHandle">Event handle.</param>private void onHttpRequestCompleted(string __requestText,HttpRequestEventHandle __eventHandle){__eventHandle(__requestText);}/// <summary>/// http请求失败的回调方法/// </summary>/// <param name="__requestText">Request text.</param>/// <param name="__eventHandle">Event handle.</param>private void onHttpRequestFailed(string __requestText,HttpRequestEventHandle __eventHandle){__eventHandle(__requestText);}}

其中用了委托的方法处理回调函数

调用方法如下：

HttpTool.Instance.Request("https://www.baidu.com",new HttpRequestEventHandle(requestEventForPromotion));//void requestEventForPromotion(string resquest){//Dictionary<string, object> response = (Dictionary<string, object>)Json.Deserialize(resquest);////if (response.ContainsKey("img"))//{//WWW imgRequest = new WWW((string)response["img"]);//// do something...//}//}