Unity中加载图片的几种方法

（1）Resources文件夹下inside图片

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using System.IO;

using UnityEngine.UI;

public class LoadImage : MonoBehaviour {

    public Texture inside;

    public Texture outside;

    //private  Texture inside;

    //private  Texture outside;

        void Start () {   Debug.Log("LLLLLLLLLLLLL");  }

    void LoadAssetsInside()

    {

        inside = Resources.Load("inside") as Texture;//Resources夹下动态加载

    }

    void OnGUI()

    {

        Debug.Log("???????????????????");

        if (GUILayout.Button("内部加载资源"))

        {LoadAssetsInside();   }

        else if (GUILayout.Button("外部加载资源"))

        {

            StartCoroutine(LoadAssetsOutside());

        }

        Rect rect1 = new Rect(300, 0, 200, 100);//设置图片位置

        GUI.DrawTexture(rect1, inside);//渲染图片

        Rect rect2 = new Rect(300, 250, 200, 100);//设置图片位置

        GUI.DrawTexture(rect2, outside);//绘制纹理

    }

        void Update ()

    {

        Debug.Log("Luuuuuuuuuuu");

        }

（2）  //Image夹下outside

    IEnumerator LoadAssetsOutside()

    {

        string url = "Image/outside.jpg";

        FileInfo fileinfo=new FileInfo(url);

        WWW www=new WWW("file://"+fileinfo.FullName);

        yield return www;

        outside = www.texture;

    }

}

(3)通过图片在Assets目录下的地址找到加载图片（很实用）

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.UI;

public class NewHowToPlayDialog : Dialog { 

 public Image img; 

 private void Awake() { 

 img = transform.GetChild(0).GetComponent(); 

  }   

 private void ChangeImage(int index)    {  

      AssetsManager.Load("Assets/_Sprites/Setting/" + index + ".png", (sprite) =>

        {

            img.sprite = sprite;

        });

    }

}