IO流代码：
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void LoadByIO() { float time = Time.time; FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read); fs.Seek(0, SeekOrigin.Begin); byte[] bytes = new byte[fs.Length]; fs.Read(bytes, 0, (int)fs.Length); fs.Close(); fs.Dispose(); fs = null; Texture2D t = new Texture2D(1,1); t.LoadImage(bytes); img.texture = t; Debug.Log("IO读取图片用时：" + (Time.time-time)); } |
WWW代码：
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IEnumerator LoadByWWW() { float time = Time.time; WWW w = new WWW("file://" + path); yield return w; if (string.IsNullOrEmpty(w.error) == false) { Debug.Log("error"); } else { img1.texture = w.texture; } Debug.Log("www读取图片用时:" + (Time.time - time)); } |
结果截图：
补充：unity加载文件的方法-用加载图片举例
一、用Resources.Load()方法
1、把图片（转换或者不转换为sprite都可）放在Resources里
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Texture2D imgTexture = Resources.Load("background_one") as Texture2D;Sprite sprite = Sprite.Create(imgTexture, new Rect(0, 0, imgTexture.width, imgTexture.height), new Vector2(0.5f, 0.5f));Image image = GetComponent<Image>();image.sprite = sprite; |
2、把图片转换成sprite，放在Resources
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//Resources.Load加载图片默认的是Texture2D类型，加了typeof(Sprite)后，就是加载为sprite类型//然后又转换为object，所以要再用as Sprite转换为Sprite，//如果不加typeof(Sprite),它就是Texture2D转换为object，就不成强制转换为SpriteImage image = GetComponent<Image>();image.sprite = Resources.Load("background_one", typeof(Sprite)) as Sprite; |
二、创建对应文件的public变量，然后再unity里把图片拖给变量赋值
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public Sprite play;public Sprite pause;Image image = GetComponent<Image>();image.sprite = play;image.sprite = pause; |
三、用WWW方式，既可以加载网络资源，也可以加载本地资源
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//用www方式读取string path = @"E:\UnityProject\ARVR\Workspace\Test2\Assets\texture\background_one.png";WWW www = new WWW(path);Texture2D texture = www.texture;Sprite sprite = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0.5f, 0.5f));Image image = GetComponent<Image>();image.sprite = sprite; |
注意：用www加载，最好使用协程，等待图片加载完毕
四、用传统IO流
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//创建文件读取流string path = @"E:\UnityProject\ARVR\Workspace\Test2\Assets\texture\background_one.png";FileStream fileStream = new FileStream(path, FileMode.Open, FileAccess.Read);fileStream.Seek(0, SeekOrigin.Begin);byte[] bye = new byte[fileStream.Length];fileStream.Read(bye, 0, bye.Length);fileStream.Close();//创建textureTexture2D texture2D = new Texture2D(240, 144);texture2D.LoadImage(bye);//创建spriteSprite sprite = Sprite.Create(texture2D, new Rect(0, 0, texture2D.width, texture2D.height), new Vector2(0.5f, 0.5f));Image image = GetComponent<Image>();image.sprite = sprite; |
以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。如有错误或未考虑完全的地方，望不吝赐教。
原文链接：https://blog.csdn.net/yiwei151/article/details/79444738
