unity image 設置圖片

從任意文件目錄下讀取文件並在unity中顯示：

1）讀取目標文件

byte[] imageByte = File.ReadAllBytes(imagePath);

2）轉換成紋理

 texture.LoadImage(imageByte);

3)轉換成精靈

Sprite sprite = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0, 0));

4）給image賦值

image.sprite = sprite;

如果圖片較大，速度轉換會相應變慢，可以考慮吧image換成RawImage，然后通過rawImage.texture = texture直接賦值，省略第三步

全代碼

    public void SetImageTexture2D( string imagePath， RawImage image)
{
        Stopwatch sw = new Stopwatch();
        sw.Start();
        
        byte[] imageByte = File.ReadAllBytes(imagePath);
        Texture2D texture = new Texture2D(1, 1);

        texture.LoadImage(imageByte);
        image.texture = texture;
        sw.Stop();
        print(sw.ElapsedMilliseconds);
        //Sprite sprite = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0, 0));
        //image.sprite = sprite;
    }