persistence

There are very few certainties in app development, but one is that once your app is released, it will change in unexpected ways. Meeting those changes can be painful. Here, we look at how to ease the pain of Core Data migrations.

Core Data and Unit Testing haven't always been the best of friends ⚔️. Core Data is all about persisting. Unit testing is all about forgetting. Here, we look at how they can work together with the help of UIKit to ensure that we gain the confidence we need to ship an app.

People really care about their possessions. They hate when change breaks those possessions 😡. This is as true of digital possessions as physical possessions. Your data model will change, but it doesn't need to break anything. Here, we look at how to migrate a Core Data model step-by-step.