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

http://www.unitymanual.com/home.php?mod=space&uid=2452&do=blog&id=420

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(, , , ), new Vector2(0.5f, 0.5f));
        gameObject.GetComponent<SpriteRenderer>().sprite = spriteA;

    }

    // Update is called once per frame
    void Update () {

    }
}