Unity使用C#网络下载用户头像

封装UnityEngine.WWW进行下载的类DownloadWWW .cs
HTTP下载HttpManager.cs

其实每个人中都会遇到在项目下载用户头像，下面是项目中使用的网络下载图片，使用WWW从网络上下载到本地，本地获取图片，使用的Unity版本是2017.1，使用UGUI

封装UnityEngine.WWW进行下载的类DownloadWWW .cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Xml;
using System.Linq;
using UnityEngine;/// <summary>/// 封装UnityEngine.WWW进行下载的类/// </summary>public class DownloadWWW : MonoBehaviour{private static DownloadWWW instance;public static DownloadWWW Instance{get{if (instance == null){GameObject obj = new GameObject();//obj.name = "DownloadWWW";instance = obj.AddComponent<DownloadWWW>();}return instance;}}private void Awake(){DontDestroyOnLoad(gameObject);}/// <summary>/// 下载url资源的文本内容/// </summary>/// <param name="url">url资源</param>/// <param name="isAddRandomParams">是否添加随机参数</param>/// <param name="callback">下载完毕回调函数</param>/// <param name="retryCount">本次下载失败后的重试次数</param>public void DownloadText(string url, bool isAddRandomParams, Action<bool, string> callback, Action<float> progress, int retryCount){if (isAddRandomParams)url = GetRandomParamsUrl(url);Debug.Log("URL:" + url);StartCoroutine(DoDownloadText(url, callback, progress, retryCount));}private IEnumerator DoDownloadText(string url, Action<bool, string> callback, Action<float> progress, int retryCount){var www = new WWW(url);while (!www.isDone){if (progress != null)progress(www.progress);yield return null;}if (progress != null)progress(www.progress);if (string.IsNullOrEmpty(www.error)){if (callback != null)callback(true, www.text);}else{if (retryCount <= 0){// 彻底失败Debug.LogError(string.Concat("DownloadText Failed!  URL: ", url, ", Error: ", www.error));if (callback != null)callback(false, null);}else{// 继续尝试yield return StartCoroutine(DoDownloadText(url, callback, progress, --retryCount));}}}/// <summary>/// 下载url资源的字节内容/// </summary>/// <param name="url">url资源</param>/// <param name="isAddRandomParams">是否添加随机参数</param>/// <param name="callback">下载完毕回调函数</param>/// <param name="retryCount">本次下载失败后的重试次数</param>public void DownloadBytes(string url, bool isAddRandomParams, Action<bool, byte[]> callback, Action<float> progress, int retryCount){if (isAddRandomParams)url = GetRandomParamsUrl(url);Debug.Log("URL:" + url);StartCoroutine(DoDownloadBytes(url, callback, progress, retryCount));}private IEnumerator DoDownloadBytes(string url, Action<bool, byte[]> callback, Action<float> progress, int retryCount){var www = new WWW(url);while (!www.isDone){if (progress != null)progress(www.progress);yield return null;}if (progress != null)progress(www.progress);if (string.IsNullOrEmpty(www.error)){if (callback != null)callback(true, www.bytes);}else{if (retryCount <= 0){// 彻底失败Debug.LogError(string.Concat("DownloadBytes Failed!  URL: ", url, ", Error: ", www.error));if (callback != null)callback(false, null);}else{// 继续尝试yield return StartCoroutine(DoDownloadBytes(url, callback, progress, --retryCount));}}}/// <summary>/// 给原始url加上随机参数/// </summary>/// <param name="url"></param>/// <returns></returns>private string GetRandomParamsUrl(string url){var r = new System.Random();var u = string.Format("{0}?type={1}&ver={2}&sign={3}", url.Trim(), r.Next(100), r.Next(100), Guid.NewGuid().ToString().Substring(0, 8));return u;}/// <summary>/// 访问http/// </summary>/// <param name="url"></param>/// <param name="onDone"></param>/// <param name="onFail"></param>public void GetHttp(string url, Action<string> onDone, Action<string> onFail){Debug.Log("URL:" + url);StartCoroutine(DoGetHttp(url, onDone, onFail));}private IEnumerator DoGetHttp(string url, Action<string> onDone, Action<string> onFail){WWW www = new WWW(url);yield return www;if (string.IsNullOrEmpty(www.error)){onDone(www.text);}else{Debug.Log("HttpResponse onFail:" + www.error);onFail(www.error);}}}

HTTP下载HttpManager.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Net;
using System.IO;
using System;
using System.Text;
using UnityEngine.UI;/// <summary>
/// HTTP下载
/// </summary>
public class HttpManager : MonoBehaviour {private static HttpManager instance;public static HttpManager Instance{get{if (instance == null){GameObject obj = new GameObject();obj.name = "HttpManager";instance = obj.AddComponent<HttpManager>();}return instance;}}/// <summary>/// web下载物体/// </summary>private  GameObject webDownloaderObj;/// <summary>/// 下载类/// </summary>private  DownloadWWW downloadWWW;/// <summary>/// 缓存字典/// </summary>private  Dictionary<string, Texture2D> dicHeadTextureMd5;/// <summary>/// 下载的图相list/// </summary>private  List<string> lisHeadName;//预备下载图像清单//private void Awake()//{//}void Start () {Init();}public  void Init(){webDownloaderObj = new GameObject("WebDownloader");downloadWWW = webDownloaderObj.AddComponent<DownloadWWW>();dicHeadTextureMd5 = new Dictionary<string, Texture2D>();}/// <summary>/// 手机内存读取图片/// </summary>public Texture2D LoadTexture2DInStorage(string url){//创建文件读取流FileStream fileStream = new FileStream(url, FileMode.Open, FileAccess.Read);fileStream.Seek(0, SeekOrigin.Begin);//创建文件长度缓冲区byte[] bytes = new byte[fileStream.Length];//读取文件fileStream.Read(bytes, 0, (int)fileStream.Length);//释放文件读取流fileStream.Close();fileStream.Dispose();fileStream = null;//创建Textureint width = 50;int height = 50;Texture2D texture = new Texture2D(width, height, TextureFormat.RGB24, false);texture.LoadImage(bytes);return texture;}/// <summary>/// 字典初始化/// </summary>private  void InitTempTextture(){if (dicHeadTextureMd5 == null){dicHeadTextureMd5 = new Dictionary<string, Texture2D>();}}/// <summary>/// 清单初始化/// </summary>private  void InitTempLisName(){if (lisHeadName == null)lisHeadName = new List<string>();}/// <summary>/// 检测字典是否包含该图片/// </summary>/// <param name="textureName"></param>/// <returns></returns>public  bool IshaveTempTextture(string textureName){return (dicHeadTextureMd5.ContainsKey(textureName));}/// <summary>/// 临时存储图片到字典/// </summary>/// <param name="textureName"></param>/// <param name="texture2D"></param>public  void SaveTempDicTextture(string textureName, Texture2D texture2D){if (!dicHeadTextureMd5.ContainsKey(textureName))dicHeadTextureMd5.Add(textureName, texture2D);}/// <summary>/// 从字典读取图片/// </summary>/// <param name="textureName"></param>/// <returns></returns>public  Texture2D LoadTempDicTextture(string textureName){return dicHeadTextureMd5[textureName];}/// <summary>/// 载入默认头像,并存入字典（临时存储）/// </summary>/// <returns></returns>public  Texture2D LoadDefaultTexture(string texNameMd5){Texture2D defTex = Resources.Load<Texture2D>("Face/headdefault");//载入默认头像SaveTempDicTextture(texNameMd5, defTex);//存入字典（临时存储）return defTex;}public void LoadImage(string url,GameObject path){RawImage rawImage = path.GetComponent<RawImage>();if (rawImage != null){StartCoroutine(LoadHead(url, rawImage));}}/// <summary>/// 头像加载/// </summary>/// <param name="url"></param>/// <returns></returns>public  IEnumerator LoadHead(string url, RawImage logo){int tryCount = 0;while (tryCount < 10)//下载尝试次数{bool andios = (Application.platform == RuntimePlatform.Android || Application.platform == RuntimePlatform.IPhonePlayer);string texName = url;//图片名称.Remove(0, url.LastIndexOf("/") + 1)string texNameMd5 = RegularExpression.MD5Encrypt32(texName);//图片名称加密md5//Debug.Log(texName + "  " + texNameMd5);+string directoryPath = "";//图片文件夹路径string directoryMd5Path = "";//图片文件完整路径bool isLoad = false;//是否开始下载，否则读内存InitTempTextture();InitTempLisName();//初始化清单if (!lisHeadName.Contains(texNameMd5)){lisHeadName.Add(texNameMd5);isLoad = true;//不存在则添加入清单,并进入下载模式}yield return 0;//下一帧后检测全局if (!isLoad){float waitTime = 0;while (!IshaveTempTextture(texNameMd5) && waitTime < 1.5f) { waitTime += Time.deltaTime; yield return 0; }//字典是否含该图片,等待快出现的内存if (waitTime < 1.5f){if(logo)logo.texture = LoadTempDicTextture(texNameMd5);//显示//有则直接读取内存}else logo.texture = LoadDefaultTexture(texNameMd5);tryCount = 10; break;//结束}else{   //无则开始图片加载过程if (andios){   ///手机无则创建文件夹//directoryPath = "D:/" + "/headimage";//directoryPath = Application.persistentDataPath + "/headimage";//文件夹路径Debug.Log("<color=yellow>图片保存路径:::"+ directoryPath + "</color>");if (!Directory.Exists(directoryPath)) Directory.CreateDirectory(directoryPath);//无则创建文件夹while (!Directory.Exists(directoryPath)) { yield return 0; }//创建时间，检测文件夹是否存在directoryMd5Path = directoryPath + "/" + texNameMd5;//图片文件完整路径//读取手机内存中文件夹里的图片if (File.Exists(directoryMd5Path)){Debug.Log("导入手机内存图片");Texture2D newTex = LoadTexture2DInStorage(directoryMd5Path);//读取logo.texture = newTex;//显示Debug.Log("<color = #FFD505>  +++++++        " + newTex.name + "+++++++++++++++++ </color> ");SaveTempDicTextture(texNameMd5, newTex);//存入字典（临时存储）tryCount = 10; break;//结束}}if (!andios || (andios && !File.Exists(directoryMd5Path))){//从服务器下载图片后存入内存if (url.Length <= 10){//长度不够则为无效url，载入默认头像logo.texture = LoadDefaultTexture(texNameMd5);tryCount = 10; break;//结束                        }else{//长度够则为有效url，下载头像WWW www = new WWW(url);yield return www; Debug.Log("头像下载完毕");if (string.IsNullOrEmpty(www.error)){   //www缓存时有缺陷，2种方式存内存Texture2D wwwTex = new Texture2D(www.texture.width, www.texture.height, TextureFormat.RGB24, false);www.LoadImageIntoTexture(wwwTex);//Texture2D wwwTex = www.texture;logo.texture = wwwTex;//显示SaveTempDicTextture(texNameMd5, wwwTex);//存入字典（临时存储）if (andios && !File.Exists(directoryMd5Path)) WebTestDownload(url, directoryMd5Path);//存入手机内存while (!File.Exists(directoryMd5Path)) { yield return 0; }Texture2D newTex = LoadTexture2DInStorage(directoryMd5Path);//读取内置SaveTempDicTextture(texNameMd5, newTex);//存入字典（临时存储）tryCount = 10; break;//结束}else tryCount++;//重新下载尝试+1}}}}}/// <summary>/// web下载/// </summary>/// <param name="url"></param>/// <param name="isAddRandomParams"></param>/// <param name="callback"></param>/// <param name="progress"></param>public  void DownloadBytes(string url, bool isAddRandomParams = true, Action<bool, byte[]> callback = null, Action<float> progress = null){if (downloadWWW == null) Init();downloadWWW.DownloadBytes(url, isAddRandomParams, callback, progress, 3);}/// <summary>/// 使用协程下载文件/// </summary>public void WebTestDownload(string url, string filepath){//string url = "http://192.168.70.88:8000/Android/weekly/last/1001.prefab.k_d4a807497e976cbadd197c90160ef3ee";DownloadBytes(url, true, (ok, bytes) =>{if (ok){//string filepath = Application.persistentDataPath + "/1001.prefab.k";File.WriteAllBytes(filepath, bytes);Debug.Log("Download Success: " + filepath + ", " + File.Exists(filepath));}});}/// <summary>/// 连接htttp请求 解析返回内容/// </summary>/// <param name="url"></param>/// <returns></returns>public string HttpGet(string url){string str=null;HttpWebRequest res = (HttpWebRequest)WebRequest.Create(url);res.Method = "GET";res.ContentType = "text/html;charset=UTF-8";HttpWebResponse response = (HttpWebResponse)res.GetResponse();Stream strRes = response.GetResponseStream();StreamReader read = new StreamReader(strRes,Encoding.GetEncoding("utf-8"));str = read.ReadToEnd();Debug.Log(str);strRes.Close();read.Close();return str;}}

怎么使用呢？只需要在场景中一个物体上挂载HttpManager.cs,
HttpManager httpManager = go.GetComponent《HttpManager》();//去它身上拿到HttpManager脚本
httpManager.LoadImage(imageURL, obj);//传入下载地址和需要改变图片的物体

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Unity使用C#网络下载用户头像

Unity使用C#网络下载用户头像

封装UnityEngine.WWW进行下载的类DownloadWWW .cs

HTTP下载HttpManager.cs

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