十一、常见的格式互相转化

Texture转Texture2D

/// 运行模式下Texture转换成Texture2D
private Texture2D TextureToTexture2D(Texture texture) 
{
        Texture2D texture2D = new Texture2D(texture.width, texture.height, TextureFormat.RGBA32, false);
        RenderTexture currentRT = RenderTexture.active;
        RenderTexture renderTexture = RenderTexture.GetTemporary(texture.width, texture.height, 32);
        Graphics.Blit(texture, renderTexture);

        RenderTexture.active = renderTexture;
        texture2D.ReadPixels(new Rect(0, 0, renderTexture.width, renderTexture.height), 0, 0);
        texture2D.Apply();

        RenderTexture.active = currentRT;
        RenderTexture.ReleaseTemporary(renderTexture);

        return texture2D;
}

texture转byte数组

Convert.FromBase64String(textureStr)

字符串转color对象

方式一：unity内置方法
string colorStr = "#FFF7F4";
ColorUtility.TryParseHtmlString(colorStr, out Color color);

字节数组与字符串互转

Convert.ToBase64String（byte[] array）
byte[] bytes = Convert.FromBase64String(str)
System.Text.Encoding.UTF8.GetString(byte[]);
System.Text.Encoding.Default.GetString(byte[]);

图片文件转字串

/// <summary>
    /// 将图片转化为字符串
    /// </summary>
    private string SetImageToString(string imgPath)
    {
        FileStream fs = new FileStream(imgPath, FileMode.Open);
        byte[] imgByte = new byte[fs.Length];
        fs.Read(imgByte, 0, imgByte.Length);
        fs.Close();
        return Convert.ToBase64String(imgByte);
    }

字符串转换为纹理

 private Texture2D GetTextureByString(string textureStr)
    {
        Texture2D tex = new Texture2D(1, 1);
        byte[] arr = Convert.FromBase64String(textureStr);
        tex.LoadImage(arr);
        tex.Apply();
        return tex;
    }

将byte[]数组保存成文件

public static bool ByteToFile(byte[] byteArray, string fileName)
        {
            bool result = false;
            try
            {
                using (FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Write))
                {
                    fs.Write(byteArray, 0, byteArray.Length);
                    result = true;
                }
            }
            catch
            {
                result = false;
            }
            return result;
        }

将文件转换成byte[]数组

public static byte[] FileToByte(string fileUrl)
        {
            try
            {
                using (FileStream fs = new FileStream(fileUrl, FileMode.Open, FileAccess.Read))
                {
                    byte[] byteArray = new byte[fs.Length];
                    fs.Read(byteArray, 0, byteArray.Length);
                    return byteArray;
                }
            }
            catch
            {
                return null;
            }
        }