Unity 加载图片_unity在电脑端加载图片

Unity 加载图片

1.服务器加载图片

using System.Collections;
using UnityEngine;
using UnityEngine.UI;
using System;
using UnityEngine.Networking;
using System.IO;

public class UploadImage : MonoBehaviour
{
    public Image img;

    public void UpLoad()
    {
        StartCoroutine(UpLoadTexture());
    }

    IEnumerator UpLoadTexture()
    {
        yield return new WaitForSeconds(0.5f);
        byte[] bytes = File.ReadAllBytes(Application.dataPath + "/StreamingAssets/" + "photo.png");
        WWWForm form = new WWWForm();
        //string id = "Photo_" + DateTime.Now.ToString("yyyy-MM-dd_hh-mm-ss");
        //form.AddField("id", id);//文件名这个参数是给服务器处理的，服务器不同，参数数量和类型也将不同
        form.AddBinaryData("file", bytes, "photo.png");
        using (UnityWebRequest www = UnityWebRequest.Post("XXX", form))
        {
            yield return www.SendWebRequest();

            if (www.isNetworkError || www.isHttpError)
            {
                Debug.Log("上传失败:" + www.error);
            }
            else
            {
                string text = www.downloadHandler.text;
                Debug.Log("服务器返回值" + text);//正确打印服务器返回值
                Debug.Log("上传成功！");
                StartCoroutine(LoadTexture(text, img));
            }
        }
    }
    

    Texture2D texture2D;
    IEnumerator LoadTexture(string url, Image image)
    {
        print(url);
        using (UnityWebRequest uwr = UnityWebRequestTexture.GetTexture(url))
        {
            yield return uwr.SendWebRequest();

            if (uwr.isNetworkError || uwr.isHttpError)
            {
                Debug.Log("图片加载失败" + uwr.error);
            }
            else
            {
                // Get downloaded asset bundle
                texture2D = DownloadHandlerTexture.GetContent(uwr);
                print("图片获取成功！");
                Sprite temp = Sprite.Create(texture2D, new Rect(0, 0, texture2D.width, texture2D.height), Vector2.zero);
                image.sprite = temp;
            }
        }
    }

}

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2.加载文件夹路径中的图片资源

/// <summary>
    /// StreamingAssets加载图片资源
    /// </summary>
    /// <param name="path">文件夹路径</param>
    /// <returns></returns>
    public Texture2D GetTexture(string path)
    {
        FileStream fileStream = new FileStream(path, FileMode.Open, FileAccess.Read);
        byte[] bytes = new byte[fileStream.Length];
        fileStream.Read(bytes, 0, (int)fileStream.Length);
        fileStream.Close();
        fileStream.Dispose();
        fileStream = null;
        int width = 300;
        int height = 372;
        Texture2D texture = new Texture2D(width, height);
        texture.LoadImage(bytes);
        //Sprite sprite = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0.5f, 0.5f));
        //image.sprite = sprite;
        return texture;
    }
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将Texture2d转换为Sprite

private Sprite TextureToSprite(Texture2D tex)
    {
        Sprite sprite = Sprite.Create(tex, new Rect(0, 0, tex.width, tex.height), new Vector2(0.5f, 0.5f));
        return sprite;
    }
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