On iOS 7, NSURLSessionTask is actually a __NSCFURLSessionTask (private class) and our NSURLSessionTask category to add the associated object asyncdisplaykit_metadata was crashing on iOS 7 stating that there was no method. This commit changes the category to extend NSURLRequest as well as change NSURLSessionTask to NSURLSessionDownloadTask.
This is a simplistic, NSURLSession-based downloader object that
implements ASImageDownloaderProtocol and can be used with
ASMultiplexImageNode and ASNetworkImageNode.
(Closes#115. NSURLSession should suffice for most usecases, and this
code should provide a good jumping-off point for a more-complex
implementation.)
