using System.Collections;using System.Collections.Generic;using UnityEngine;public class Test2 : MonoBehaviour {	public GameObject platform;	// Use this for initialization	void Start () {		changeSpriteByAnotherSprite ();	}	void changeSpriteByImage(){		Texture2D Tex = Resources.Load ("enter") as Texture2D;		SpriteRenderer spr = platform.GetComponent
     
       ();  		Sprite spriteA = Sprite.Create (Tex, spr.sprite.textureRect, new Vector2 (0.5f, 0.5f));		platform.GetComponent
      
        ().sprite = spriteA;	}	void changeSpriteByAnotherSprite(){		Sprite spriteB = Resources.Load
       
         ("test");		platform.GetComponent
        
          ().sprite = spriteB;	}}
        
       
      
     

注意：必须将Sprite资源和Image放在Resources文件夹下面。

用changeSpriteByAnotherSprite（）更方便，在编辑器中设置刚方便，注意Pixels Per Unit的设置。