Sync Core Data database

App & System Services Core OS
alex_kac OP
Created Jun ’15
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I'll ask this in one of the WWDC sessions as well, but I'm wondering if there is already any docs (I haven't seen any) for apps that use a Core Data database - complex - one on the iPhone? I don't want to copy the file back and forth between the watch and iPhone. Some people have up to a 200MB database (though usually its 5-10MB).


I'm thinking I'll have to use CloudKit for this purpose, or some kind of iCloud sync, but before I go that route I want to see what others think. And yes, my thought was to only put in a subset of the data necessary for the watch app.

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SunnyDev OP
Jun ’15

I would love to know if Apple is planning to support CloudKit with offline syncing.

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Documentation Engineer OP
Apple
Jun ’15

There is no direct CloudKit support in watchOS 2. You will need to copy the data you need via the WatchConnectivity framework or via a web service, using NSURLSession.


I would urge you to only use a subset of what you need on Apple Watch. That's what we ended up doing in the WWDC app for Apple Watch.

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alex_kac OP
Jun ’15

I understand the concept of subsets, but that's not an implementation help.

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Sync Core Data database
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