NSURLCacheStorageNotAllowed still caching

Question

I have a JSON file on S3 I'm downloading over HTTP with an NSURLConnection. I set the connection to use a caching policy of NSURLCacheStorageNotAllowed but I was still seeing an old version of the data come back. I changed to NSURLRequestReloadIgnoringLocalAndRemoteCacheData and the caching behaviour works.

Can anyone explain why?

score 2 · Accepted Answer · edited May 23 '17 at 12:20

2

This is a mistake by not understanding the difference between NSURLCachedStoragePolicy and NSURLRequestCachePolicy, please see my answer here:

https://stackoverflow.com/a/24783824/1800915

edited May 23 '17 at 12:20

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answered Jul 16 '14 at 14:51

Wladek Surala

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score 1 · Answer 2 · answered Dec 23 '13 at 07:40

As of today, it looks like NSURLRequestReloadIgnoringLocalAndRemoteCacheData is actually doing nothing. From NSURLRequest.h in OS 10.9.1:

Screenshot of NSURLRequest.h

It looks like the best bet may be to use NSURLRequestReloadIgnoringLocalCacheData instead. (Unless Apple simply forgot to update its header file to remove that comment.)

NSURLCacheStorageNotAllowed still caching

2 Answers2