public void SetAsyncImage(string url, AsyncImgCall call)
{
//图片储存路径
string path = Application.persistentDataPath + "/ImageCache/";
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
string fileName = path + url.GetHashCode();
if (TextureDic.ContainsKey(fileName))
{
call(EnAsyncImgStatus.EnFinish, TextureDic[fileName]);
}
else
{
if (!File.Exists(path + url.GetHashCode()))
{
call(EnAsyncImgStatus.EnStart, null);
StartCoroutine(DownloadImage(url, path, call));
}
else
{
StartCoroutine(LoadLocalImage(url, path, call));
}
}
}
private IEnumerator DownloadImage(string url, string path, AsyncImgCall call)
{
WWW www = new WWW(url);
yield return(www);
if (www.error != null)
{
//YxDebug.Log(www.error);
call(EnAsyncImgStatus.EnError, www.error);
yield break;
}
Texture2D image = www.texture;
byte[] pngData = image.EncodeToPNG();
File.WriteAllBytes(path + url.GetHashCode(), pngData);
call(EnAsyncImgStatus.EnFinish, image);
string key = path + url.GetHashCode();
if (!TextureDic.ContainsKey(key))
{
TextureDic.Add(key, image);
}
}
private IEnumerator LoadLocalImage(string url, string path, AsyncImgCall call)
{
string filepath = "file:///" + path + url.GetHashCode();
WWW www = new WWW(filepath);
yield return(www);
if (www.error != null)
{
call(EnAsyncImgStatus.EnError, www.error);
yield break;
}
call(EnAsyncImgStatus.EnFinish, www.texture);
string key = path + url.GetHashCode();
if (!TextureDic.ContainsKey(key))
{
TextureDic.Add(key, www.texture);
}
}
