unity加载文件的方法-用加载图片举例

来源：互联网发布：海文网络班编辑：程序博客网时间：2024/05/21 21:02

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

        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

        //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Sprite        Image 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

    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

//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

//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texture        Texture2D texture2D = new Texture2D(240, 144);        texture2D.LoadImage(bye);        //创建sprite        Sprite 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;

参考文档：http://blog.csdn.net/qinyuanpei/article/details/49000907

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