Unity加载服务器图片地址到Image上使用

系列文章目录

unity工具

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前言 unity 加载图片

有时候会从服务上下载图片,来应用到unity里面

提示：以下是本篇文章正文内容，下面案例可供参考

一、第一种UnityWebRequest加载方式

代码如下:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.UI;
public class LoadSprite : MonoBehaviour
{
    public Image image;
    private string url="自己图片的地址";
    private void Start()
    {
        StartCoroutine(PostSprite(url));
    }
    public void LoadSpriteByte(byte[] path)
    {
        image.sprite = ChangeToSprite(ByteToTex2d(path));
    }

    //根据字节流转换成图片
    public static Texture2D ByteToTex2d(byte[] bytes)
    {
        int w = 500;
        int h = 500;
        Texture2D tex = new Texture2D(w, h);
        tex.LoadImage(bytes);
        return tex;
    }
    //转换为Image
    private Sprite ChangeToSprite(Texture2D tex)
    {
        Sprite sprite = Sprite.Create(tex, new Rect(0, 0, tex.width, tex.height), new Vector2(0.5f, 0.5f));
        return sprite;
    }
    public IEnumerator PostSprite(string url)
    {
        using (UnityWebRequest webRequest = UnityWebRequestTexture.GetTexture(url))
        {
            yield return webRequest.SendWebRequest();

            // 检查是否有错误
            if (webRequest.result != UnityWebRequest.Result.Success)
            {
                Debug.LogError("Error: " + webRequest.error);
                Debug.Log(webRequest.responseCode);
                image.sprite = null;
            }
            else
            {
                // 请求成功，处理响应数据
                LoadSpriteByte(webRequest.downloadHandler.data);
                webRequest.Dispose();
            }
        }
    }
}

二、第二种www加载方式

1.代码如下

  IEnumerator DownloadImage(string url)
    {
        WWW www = new WWW(url);
        yield return www;
        Texture2D tex2d = www.texture;
        Sprite m_sprite = Sprite.Create(tex2d, new Rect(0, 0, tex2d.width, tex2d.height), new Vector2(0, 0));
        image.sprite=m_sprite;
    }

三.把图片地址转成Base64数据,然后再加载出来的方法

1.所需要引用的命名空间

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.UI;
using System.Net.Http;
using System.Threading.Tasks;

2.所用到的方法

 public static Texture2D ByteToTex2d(byte[] bytes)
    {
        int w = 500;
        int h = 500;
        Texture2D tex = new Texture2D(w, h);
        tex.LoadImage(bytes);
        return tex;
    }
    //转换为Image
    private Sprite ChangeToSprite(Texture2D tex)
    {
        Sprite sprite = Sprite.Create(tex, new Rect(0, 0, tex.width, tex.height), new Vector2(0.5f, 0.5f));
        return sprite;
    }
    public async Task PostSpriteAsync(string url)
    {
        image.sprite = ChangeToSprite(ByteToTex2d(await GetImageAsBase64String(url)));   
    }

    public static async Task<byte[]> GetImageAsBase64String(string url)
    {
        using (var httpClient = new HttpClient())
        {
            // 发送 HTTP 请求获取图片的字节
            byte[] imageBytes = await httpClient.GetByteArrayAsync(url);

            // 将字节转换为 Base64 字符串
            return (imageBytes);
        }
    }

unity 下载ab包

有时候模型会放到服务器上,这时候就需要下载了

提示：以下是本篇文章正文内容，下面案例可供参考

四、unity加载ab包

4-1 代码如下

代码如下（示例）：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;

public class ABLoad : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        
    }
    /// 

    /// 加载ab包
    /// 
    /// 路径
    /// 加载到哪个父物体下面
    /// 
    public IEnumerator FromWebRequest(string path, Transform parents)
    {
        UnityWebRequest webRequest = UnityWebRequestAssetBundle.GetAssetBundle(path);

        yield return webRequest.SendWebRequest();

        AssetBundle assetBundle = DownloadHandlerAssetBundle.GetContent(webRequest);

        object[] objects = assetBundle.LoadAllAssets();

        for (int i = 0; i < objects.Length; i++)
        {
            GameObject obj = Instantiate((GameObject)objects[i], parents);
        }
        //yield return new WaitForSeconds (3f);
        yield return null;

        //卸载资源
        assetBundle.Unload(false);

    }
   
}

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五. 加载图片的跟加载ab包的大同小异

六. Unity网络请求用法

6-1. Post请求

代码如下

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;

public class PostLoad : MonoBehaviour
{
    private string url;
    public void GetPostDatas(string ipp, string deviceId, string idd)
    {   //deviceId    
        WWWForm formData = new WWWForm();
        formData.AddField(deviceId, idd);
        StartCoroutine(PostRequest(url + ipp, formData, data=> {
        //后面的逻辑写到这个地方 data就是数据
        
        }));
    }
  
    /// 

    /// 获取设备的状态的  Root
    /// 
    /// 
    /// 
    /// 
    /// 
    IEnumerator PostRequest(string url, WWWForm formData , Action<string> callback)
    {
        using (UnityWebRequest webRequest = UnityWebRequest.Post(url, formData))
        {
            // 发送请求
            yield return webRequest.SendWebRequest();

            // 检查是否有错误
            if (webRequest.result != UnityWebRequest.Result.Success)
            {
                Debug.LogError("Error: " + webRequest.error);
                Debug.Log(webRequest.responseCode);

            }
            else
            {
                // 请求成功，处理响应数据               
                Debug.Log("Response: " + webRequest.downloadHandler.text);
                callback?.Invoke(webRequest.downloadHandler.text);
                webRequest.Dispose();
            }
        }
    }
}

6-2、Get请求

6-2-1.代码如下

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;

public class GetLoad : MonoBehaviour
{
    private string urll;
    private string token;  //有就加,没有就不加
    // Start is called before the first frame update
    void Start()
    {
        StartCoroutine(PostRequest_GET("code", "floor", 1, data => {
            //后面的逻辑写到这个地方 data就是数据

        }));
    }

    public IEnumerator PostRequest_GET(string code, string floor, int page, Action<string> callback)
    {
        string url = string.Format(urll + "/IndoorAntenna/antennaList?code={0}&floor={1}&page={2}&pageSize=10&Authorization=Bearer {3}", code, floor, page, token);
        using (UnityWebRequest webRequest = UnityWebRequest.Get(url))
        {
            // 发送请求
            yield return webRequest.SendWebRequest();

            // 检查是否有错误
            if (webRequest.result != UnityWebRequest.Result.Success)
            {
                Debug.LogError("Error: " + webRequest.error);
                Debug.Log(webRequest.responseCode);

            }
            else
            {
                // 请求成功，处理响应数据
                Debug.Log(webRequest.responseCode);
                Debug.Log("Response: " + webRequest.downloadHandler.text);
                callback?.Invoke(webRequest.downloadHandler.text);
                webRequest.Dispose();
                //GetJsonData_HuiYiShi(root.data);
            }
        }

    }
}

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总结

总结一下,希望对你有需要,也刚好对你有用

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