Inspect NSCache contents on iOS?

Question

Is there a way to inspect NSCache's contents for debugging purposes?

This would not be used in the App Store. I just would like to be able to see what's going on in there while debugging. The description is pretty useless.

I don't know any existing tool which can help you doing that. But NSCache is thread-safe. You may just want to write a small daemon which stores the content of NSCache to disk based on a timer. — miho, Jan 24 '14 at 19:54
While you can pull objects out of a cache based on their key, there doesn't seem to be a way to enumerate or get all the keys. — Steven Fisher, Jan 24 '14 at 19:58

score 10 · Answer 1 · answered Apr 08 '19 at 09:33

10

No need to use a third party library. You can do this using the "allObjects" key from NSCache. For example:

if let all = yourCache.value(forKey: "allObjects") as? NSArray {
    for object in all {
        print("object is \(object)")
    }
}

answered Apr 08 '19 at 09:33

jjjjjjjj

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score 2 · Accepted Answer · edited Jan 24 '14 at 22:20

2

There is an open-source replacement for NSCache that solves this exact issue: https://github.com/gregkrsak/GKCache

edited Jan 24 '14 at 22:20

miho

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answered Jan 24 '14 at 21:56

proxi

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This is exactly the code I was about to write, so thanks for the link. :) – Steven Fisher Jan 24 '14 at 23:18

score 1 · Answer 3 · answered Sep 10 '18 at 12:35

1

NSCache doesn't have such feature. But you can use custom solution, e.g.: VSCache

It's thread-safe and easy to use.

answered Sep 10 '18 at 12:35

J. Doe

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score 0 · Answer 4 · answered Oct 11 '21 at 16:46

0

You can see all keys and objects with

-[NSCache mapTableRepresentation]

answered Oct 11 '21 at 16:46

mackworth

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Inspect NSCache contents on iOS?

4 Answers4