NSURLRequest.CachePolicy.returnCacheDataDontLoad
Use existing cache data, regardless or age or expiration date, and fail if no cached data is available.
Declaration
case returnCacheDataDontLoadMentioned in
Discussion
If there is no existing data in the cache corresponding to a URL load request, no attempt is made to load the data from the originating source, and the load is considered to have failed. This constant specifies a behavior that is similar to an “offline” mode.