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iOS Introduction to Core Data with Swift 2 Understanding the Core Data Stack What is Core Data?

Posted by Tony Warner
Tony Warner
1,631 Points

How do I migrate User Defaults in order to prevent crashing when installing new versions of my app?

Hi,

I have an app on the app store. I need to update the version after adding some changes. I'm finding that the app will crash on loading when I install the new version over the old---but the crash doesn't happen if I uninstall the previous version first (which clears all persisted data). I assume this is a pretty common problem.

The only piece of persisted data I use is a "on-boarding complete" boolean, letting the app know if the user has already gone through the on-boarding pages.

So, if everything above sounds right, my question is: How do I migrate the User Defaults from one version to the next so that the App doesn't crash when users download new versions from the App Store?

I'd appreciate any help / guidance.