Question

我无法强制ImageDownloader正确使用ReturnCacheDataElseLoad（使用以前从缓存中下载的图片）

我在我的应用中使用的服务器返回标题下方：

headers {
    "Cache-Control" = "public, max-age=600";
    Connection = "keep-alive";
    "Content-Type" = "image/jpeg";
    Date = "Mon, 29 Feb 2016 13:25:22 GMT";
    "Transfer-Encoding" = Identity;
    "X-Powered-By" = Express;
}

ImageDownloader由下面描述的配置初始化：

let configuration = ImageDownloader.defaultURLSessionConfiguration()

// If we do not use image filters, it is advised by Alamofire to set the memory capacity of the NSURLCache to zero to avoid storing the same content in-memory twice.
configuration.URLCache?.memoryCapacity = 0

// Existing cache data should be used to satisfy a URL load request, regardless of its age or expiration date.
// However, if there is no existing data in the cache corresponding to a URL load request, the URL is loaded from the origin source
configuration.requestCachePolicy = .ReturnCacheDataElseLoad

问题是，当我在离线模式下重新打开应用程序10分钟后（由缓存控制标头中的服务器定义600秒）后，所有以前下载的图片都会消失。

我从这里尝试了各种解决方案（如此处所述：Alamofire - NSURLCache is not working?），但没有任何帮助。

编辑：我刚刚观察到的另一件事（可能会影响上面的行为）是文件夹/ Library / Caches / {appname} / fsCachedData在某些时候被删除（系统未知？）

Alamofire ImageDownloader ReturnCacheDataElseLoad未得到尊重

0 个答案: