If your app is called Hammersmith, you can retain/autorelease it in your [CBLDatabase dealloc] or [CBLCache dealloc]
On Oct 22, 2013, at 11:03, Jens Alfke <[email protected]> wrote: > > On Oct 21, 2013, at 7:57 PM, Maxthon Chan <[email protected]> wrote: > >> What about the “database” object? Is that yours? If so, can you >> retain/autorelease it (using runtime functions documented by LLVM) when >> purging? > > Let me copy and paste what I said before: "I’m not in control of the cache > purge — it seems to be triggered as part of the app going into the > background." > > If you want to see the backtrace, it’s here (I tried to link to it before but > the listserv stripped the HTML link): > https://github.com/couchbase/couchbase-lite-ios/issues/164 > > The purge happens like so: > frame #25: 0x39445730 libcache.dylib`cache_remove_with_block + 132 > frame #26: 0x2e7e6834 > CoreFoundation`__CFNotificationCenterAddObserver_block_invoke + 124 > frame #27: 0x2e870120 > CoreFoundation`__CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12 > frame #28: 0x2e7e4316 CoreFoundation`_CFXNotificationPost + 1718 > frame #29: 0x2f1c8dcc Foundation`-[NSNotificationCenter > postNotificationName:object:userInfo:] + 76 > frame #30: 0x310a3040 UIKit`-[UIApplication > _handleApplicationSuspend:eventInfo:] + 908 > … > > That is, it looks like NSCache has registered itself for the > going-into-the-background notification. I have no control over this. There is > no way I can call anything before/after the purge. I cannot retain anything > while purging. > > —Jens
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