目录
在unity2021中，WWW的资源加载方式过时了，新的方法为UnityWebRequest
在unity2021中，WWW的资源加载方式过时了，新的方法为UnityWebRequest
实际开发过程中，游戏APP通常在连接游戏服务器之前先从web服务器获取GM配置的相关信息，这里模拟服务器和前端的简单交互，用Unity的UnityWebRequest的GET和POST两种方式提交表单，向后端请求数据，后端返回JSON数据，前端根据返回数据执行相关逻辑。
Demo的内容：
- 用UnityWebRequest的GET和POST表单提交，与php（返回JSON）交互
- 从web服务器下载图片替换本地显示的图片
- 用BestHttp插件的GET和POST表单提交，与php（返回JSON）交互
演示图片：
演示视频：
UnityWebRequest下载图片demo
直接上代码，都是老司机，demo仅供参考玩
PHP脚本：GetInfo.php
202205312146151616) { exit(json_encode([ 'code' => '200', 'msg' => 'GET_success', 'num' => 71, 'data' => [ 'aa' => true, 'bb' => false, 'cc' => 15, 'dd' => 3.1415, 'ee' => [1,2,3], ] ])); // var_dump("登录成功"); } else { exit(json_encode([ 'code' => '200', 'msg' => 'user does not exist', 'data' => [] ])); } } else if ($_GET["action"]=="get_picture_num") { exit(json_encode([ 'code' => '200', 'msg' => 'GET_success', 'num' => 71, ])); } else { exit(json_encode([ 'code' => '200', 'msg' => 'GET 请求', 'data' => [] ])); } }// 如果是POST请求if ($_SERVER['REQUEST_METHOD'] == 'POST') { // POST访问。。。。 if ($_POST["action"]=="login") { if ($_POST['user'] == 'admin' && $_POST['pwd'] == 'admin' && $_POST['time']>202205312146151616) { exit(json_encode([ 'code' => '200', 'msg' => 'POST_success', 'num' => 71, 'data' => [ 'aa' => true, 'bb' => false, 'cc' => 15, 'dd' => 3.1415, 'ee' => [1,2,3], ] ])); // var_dump("登录成功"); } else { exit(json_encode([ 'code' => '200', 'msg' => 'user does not exist', 'data' => [] ])); } } else { exit(json_encode([ 'code' => '200', 'msg' => 'POST 请求', 'data' => [] ])); } }C#代码：DownloadUI.cs
using MiniJSON;using System;using System.Collections;using System.Collections.Generic;using System.Text;using UnityEngine;using UnityEngine.Networking;using UnityEngine.UI;public class DownloadUI : MonoBehaviour{ //图片占位图 public Texture placeholder; //要替换背景的RawImage public RawImage testholder; //点击左边这个按钮，显示默认占位图 public Button setDefaultImage; //点击这个按钮，从Web服务器加载图片显示在上面的RawImage public Button setWebImage; //索引，默认从第一张图片开始下载 private int index; // 要下载的图片的总数量 private int num; void Start() { //测试，用POST向服务器提交信息 StartCoroutine(HttpPostRequest()); //测试，用GET向服务器提交信息 StartCoroutine(HttpGetRequest()); //从服务器获取要下载的图片的数量 StartCoroutine(HttpGetPictureNumRequest()); //两个按钮的点击事件(注：此处省略了用代码获取UI主件，直接在UI上拖拽设置了) setDefaultImage.onClick.AddListener(DefaultCallBack); setWebImage.onClick.AddListener(WebCallBack); //初始化索引，默认从第一张图片开始下载 index = 1; } /// /// 从服务器获取要下载的图片的数量 /// /// data = (Dictionary)Json.Deserialize(str); if (data.ContainsKey("num")) { num = Convert.ToInt32(data["num"]); } } } private void WebCallBack() { string url = "http://wy.bestshe.top/game/"; if (index > num) index = 1; url = url + index + ".jpeg"; AsyncImageDownload.Instance.SetAsyncImage(url, testholder); index++; } private void DefaultCallBack() { //开始下载图片前，如果没有图片，则将UITexture的主图片设置为占位图 if (testholder.texture == null) { testholder.texture = placeholder; } else { //再次点击default替换掉下载的图 testholder.texture = placeholder; } } private IEnumerator HttpPostRequest() { string url = "http://wy.bestshe.top/game/GetInfo.php"; WWWForm form = new WWWForm(); form.AddField("action", "login"); form.AddField("user", "admin"); form.AddField("pwd", "admin"); form.AddField("time", string.Format("{0:yyyyMMddHHmmssffff}", DateTime.Now)); UnityWebRequest web = UnityWebRequest.Post(url, form); yield return web.SendWebRequest(); if (web.result != UnityWebRequest.Result.Success) Debug.Log(" error:" + web.error); else if (web.isDone) { string str = Encoding.UTF8.GetString(web.downloadHandler.data); Debug.Log("Post发送成功----" + str); } } private IEnumerator HttpGetRequest() { string url = "http://wy.bestshe.top/game/GetInfo.php?action=login&user=admin&pwd=admin"; url = SetUrlTime(url); UnityWebRequest web = UnityWebRequest.Get(url); yield return web.SendWebRequest(); if (web.result != UnityWebRequest.Result.Success) Debug.Log(" error:" + web.error); else if (web.isDone) { string str = Encoding.UTF8.GetString(web.downloadHandler.data); Debug.Log("Get发送成功----" + str); } } public string SetUrlTime(string url) { string symbol = url.IndexOf("?") > -1 ? "&" : "?"; url = string.Format("{0}{1}time={2}", url, symbol, string.Format("{0:yyyyMMddHHmmssffff}", DateTime.Now)); return url; }} AsyncImageDownload.cs
using UnityEngine;using System.Collections;using System.Collections.Generic;using System.IO;using UnityEngine.Networking;using UnityEngine.UI;public class AsyncImageDownload : MonoBehaviour{ public static AsyncImageDownload Instance = null; private static string path; public Dictionary textureCache = new Dictionary(); void Awake() { Instance = this; path = Application.persistentDataPath + "/ImageCache/"; if (!Directory.Exists(path)) { Directory.CreateDirectory(path); } } public void SetAsyncImage(string url, RawImage texture) { //判断是否是第一次加载这张图片 if (!File.Exists(path + url.GetHashCode())) { //如果之前不存在缓存文件 StartCoroutine(DownloadImage(url, texture)); } else { StartCoroutine(LoadLocalImage(url, texture)); } } IEnumerator DownloadImage(string url, RawImage texture) { using UnityWebRequest uwr = UnityWebRequestTexture.GetTexture(url); yield return uwr.SendWebRequest(); if (uwr.result != UnityWebRequest.Result.Success) Debug.Log("DownloadImage error:" + uwr.error); else if (uwr.isDone) { //将下载到的图片赋值到RawImage上 Texture2D mTexture2D = DownloadHandlerTexture.GetContent(uwr); texture.texture = mTexture2D; //将下载到的图片赋值到RawImage上（二选一都行） //texture.texture = ((DownloadHandlerTexture)uwr.downloadHandler).texture; //将图片保存至缓存路径 byte[] jpgData = mTexture2D.EncodeToJPG(); File.WriteAllBytes(path + url.GetHashCode(), jpgData); textureCache[url] = mTexture2D; } } IEnumerator LoadLocalImage(string url, RawImage texture) { string filePath = "file:///" + path + url.GetHashCode(); if (textureCache.TryGetValue(url, out Texture2D tex)) { texture.texture = tex; } else { using UnityWebRequest uwr = UnityWebRequestTexture.GetTexture(filePath); yield return uwr.SendWebRequest(); if (uwr.result != UnityWebRequest.Result.Success) Debug.Log("DownloadImage error:" + uwr.error); else if (uwr.isDone) { Texture2D mTexture2D = DownloadHandlerTexture.GetContent(uwr); textureCache[url] = mTexture2D; texture.texture = mTexture2D; } } }} BestHttp的Get方式和Post方式
using System;using System.IO;using BestHTTP;using UnityEngine;using UnityEngine.UI;namespace BestHttpDemo{ public class BestHttpTest : MonoBehaviour { private Button button; private RawImage image; void Start() { button = transform.Find("Button (Legacy)").GetComponent
部分API
public void BestHttpAPI() { GeneralStatistics stats = HTTPManager.GetGeneralStatistics(StatisticsQueryFlags.All); //获取统计信息，统计类型全部 BestHTTP.Caching.HTTPCacheService.IsSupported //是否支持缓存(只读) stats.CacheEntityCount.ToString(); //缓存对象个数 stats.CacheSize.ToString("N0"); //缓存总大小 BestHTTP.Caching.HTTPCacheService.BeginClear(); //清空缓存 BestHTTP.Cookies.CookieJar.IsSavingSupported //是否支持保存Cookie(只读) stats.CookieCount.ToString(); //Cookie个数 stats.CookieJarSize.ToString("N0"); //Cookie总大小 BestHTTP.Cookies.CookieJar.Clear(); //清空Cookie HTTPManager.GetRootCacheFolder() //获取缓存和Cookies目录路径 stats.Connections.ToString(); //Http连接数 stats.ActiveConnections.ToString(); //激活的Http连接数 stats.FreeConnections.ToString(); //空闲的Http连接数 stats.RecycledConnections.ToString(); //回收的Http连接数 stats.RequestsInQueue.ToString(); //Request请求在队列的数量 BestHTTP.HTTPManager.OnQuit(); //退出统计 //缓存维护 缓存最大1mb, 删除2天前的缓存 BestHTTP.Caching.HTTPCacheService.BeginMaintainence(new BestHTTP.Caching.HTTPCacheMaintananceParams( TimeSpan.FromDays(2),1 *1024*1024 )); //Cookie维护 删除7天前的Cookie并保持在最大允许大小内。 BestHTTP.Cookies.CookieJar.Maintain(); //获取Cookie集合 List cookie = CookieJar.Get(new Uri("https://www.baidu.com/")); //Cookie的API很多 cookie[0].Name cookie[0].Domain cookie[0].Value } */原文链接：https://blog.csdn.net/u012322710/article/details/52860747 来源地址：https://blog.csdn.net/hack_yin/article/details/125091499
