STEP-BY-STEP CORE DATA MIGRATION

williamboles.me

In our iOS apps we often store these thingamabobs in Core Data. The structure of which is defined by a model/schema - a set of entities with attributes and relationships. A common situation in development is that over time our model changes. In order to allow these changes to happen we need to migrate our user’s data from the old structure to the new structure. In this post, we are going to build a simple system to handle Core Data migrations.

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