/// <summary>
/// 重置图片的Sprite，通过Url 或者 名称
/// (先加载默认资源)
/// </summary>
/// <param name="image"></param>
/// <param name="spriteName"></param>
/// <param name="remoteUrl"></param>
/// <param name="isNativeSize"></param>
public static IEnumerator ResetSpriteByRemoteUrlOrLocal(this UnityEngine.UI.Image image, string remoteUrl, string spriteName, bool isNativeSize = false)
{
bool isSetedByRemoteSprite = false;
if (!string.IsNullOrEmpty(remoteUrl))
{
// 判断本地的cache 有没有
bool isCached = false;
string localFileName = string.Format("{0}/{1}.face", AppDefine.LOCAL_HEADICON_PATH, Utility.GetMD5Code(remoteUrl));
string realUrl = remoteUrl;
if (FileUtility.ExistsFile(localFileName))
{
isCached = true;
realUrl = "file:///" + localFileName;
}
using (WWW loader = new WWW(realUrl))
{
if (!loader.isDone)
{
yield return(loader);
}
if (loader.isDone)
{
if (string.IsNullOrEmpty(loader.error))
{
if (!isCached)
{
FileUtility.WriteBytesToFile(localFileName, loader.bytes, loader.bytes.Length);
}
if (image == null)
{
yield break;
}
Texture2D tempImage = loader.texture;
if (tempImage != null)
{
Sprite sprite = Sprite.Create(tempImage, new Rect(0, 0, tempImage.width, tempImage.height), new Vector2(0, 0));
image.sprite = sprite;
isSetedByRemoteSprite = true;
if (isNativeSize)
{
image.SetNativeSize();
}
}
}
}
else
{
Debug.LogErrorFormat("load sprite[{0}] error:{1}", remoteUrl, loader.error);
}
}
}
// 如果设置远程资源失败了，则，设置本地的图片资源
if (!isSetedByRemoteSprite)
{
if (!string.IsNullOrEmpty(spriteName))
{
image.ResetSpriteByName(spriteName, isNativeSize);
}
}
}
