unityimage设置图片

从任意⽂件⽬录下读取⽂件并在unity中显⽰：1）读取⽬标⽂件

byte[] imageByte = File.ReadAllBytes(imagePath);2）转换成纹理

texture.LoadImage(imageByte);3)转换成精灵

Sprite sprite = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0, 0));4）给image赋值image.sprite = sprite;

如果图⽚较⼤，速度转换会相应变慢，可以考虑吧image换成RawImage，然后通过rawImage.texture = texture直接赋值，省略第三步全代码

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; }