Are resources recopied when the app is updated?

Question

iOS

If I roll out a new build and update a resource in it ( sqlite3 db for example ) - it is copied again, or I need to migrate to an already copied database (the one that was copied when installing the application)

Answer 1

If the resource is in the application bundle, then it will be copied and you, accordingly, do not need to do anything.
If your resource was in the Documents\Cache\ etc folder, then you will have to bother with migration (as is done in the case of core data)