UGUI的image如何修改source呢？

GameObject go = btn.transform.FindChild("bg").gameObject;
Image image = go.GetComponent<Image>();
image.overrideSprite = Resources.Load("textures/icon/1", typeof(Sprite)) as Sprite;
拿去花...

public Image dd;
// Use this for initialization
void Start()
{
dd.overrideSprite = Resources.Load("GUI/Textures/bg-2D水位-水位提示-蓝色提醒", typeof(Sprite)) as Sprite;
InvokeRepeating("check",0,0.3f);
}
结果：Unknown type: UnityEngine.Sprite
差using 引用吗

WWW m_www = new WWW("file:///" + "PATH" + "\\Point.png");
Sprite m_sprite = Sprite.Create(m_http://www.texture, new Rect(0, 0, m_http://www.texture.width, m_http://www.texture.height), new Vector2(0, 0));
GameObject.Find("Image").GetComponent<Image>().sprite = m_sprite;

GameObject.Find("Image").GetComponent<Image>().sprite = m_sprite 很有用 谢谢