ios - URLCache caches URL on Xcode simulator but not device -


my urlcache caches urls in xcode simulator, not on real device. narrowed code down example:

if let urlcache = sessionmanager().session.configuration.urlcache {      // returns nil, because there's nothing in cache     print(urlcache.cachedresponse(for: urlrequest))      // put url in cache     urlcache.storecachedresponse(cachedurlresponse(response: response, data: responsedata), for: urlrequest)      // url should in cache, it's still nil!     print(urlcache.cachedresponse(for: urlrequest)) }

i'm confused this. ideas?


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