[游戏开发]Unity-基础篇-加载外部图片

using System.IO;
using UnityEngine;
using UnityEngine.UI;

public class LoadPicture : MonoBehaviour
{  
     //载体为RawImage
    void LoadPicByIo(RawImage raw,int index)
    {          
        FileStream fileStream = new FileStream(Application.dataPath + "/" + index + ".png", FileMode.Open, FileAccess.Read);
        fileStream.Seek(0, SeekOrigin.Begin);
        byte[] bytes = new byte[fileStream.Length];
        fileStream.Read(bytes, 0, (int)fileStream.Length);
        fileStream.Close();
        fileStream.Dispose();
        fileStream = null;
        int width = 1920;
        int height = 1080;
        Texture2D tex = new Texture2D(width, height);
        tex.LoadImage(bytes);
        raw.texture = tex;
    }
    //载体为Image
    void LoadPicByIo(Image img, int index)
    {
        FileStream fileStream = new FileStream(Application.dataPath + "/" + index + ".png", FileMode.Open, FileAccess.Read);
        fileStream.Seek(0, SeekOrigin.Begin);
        byte[] bytes = new byte[fileStream.Length];
        fileStream.Read(bytes, 0, (int)fileStream.Length);
        fileStream.Close();
        fileStream.Dispose();
        fileStream = null;
        int width = 1920;
        int height = 1080;
        Texture2D tex = new Texture2D(width, height);
        tex.LoadImage(bytes);
        img.sprite = Sprite.Create(tex, new Rect(0, 0, 1920, 1080), new Vector2(0, 0));
    }
}

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