Unity3d 4.3 通过代码动态更改SpriteRender的Sprite

using UnityEngine;
using System.Collections;

public class TestSprite : MonoBehaviour {

    public Sprite spriteA;
    public Texture2D Tex;
    // Use this for initialization
    void Start () {
        Tex = Resources.Load("Enter") as Texture2D;

        //Create(源资源，对应sprite的矩形，对应sprite的中心点坐标)
        spriteA = Sprite.Create(Tex, new Rect(171, 0, 171, 95), new Vector2(0.5f, 0.5f));
        gameObject.GetComponent<SpriteRenderer>().sprite = spriteA;
        
    }
    
    // Update is called once per frame
    void Update () {
    
    }
}