CODEWITHSUNDEEP
iphonecore-datapersistent-storage
monotreme
monotreme

Reputation: 582

Persistant Store and App Update

I have an iPhone app up on the store which uses core data. Now, every time I change something in my code with relation to core data, namely my managedobjectmodel or my model classes, I have to wipe all my data since I get a persistent store error.

Now I'm finding i need to make changes to my app and I don't want my users to lose all their data. What do I do? This is my first foray into Core Data so any help is appreciated. Thanks.

Upvotes: 0

Views: 156

Answers (2)

monotreme
monotreme

Reputation: 582

Never mind. It's versioning and migration that I need to look into, no bother.

Upvotes: 0

gerry3
gerry3

Reputation: 21460

You need to version your data model. Check out Xcode > Design > Data Model. Then you need to migrate the data to the new model. This can get complicated depending on the changes.

Try this documentation.

Upvotes: 3

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