Core Data Best Practices

WWDC 2018

Core Data Manages Persistence

How the container Finds Models

More Container Tricks

Generalizing Controllers

• Getting view controllers what they need when using

Matching UIs to the Model

Managed Object ContextWillSave Notification

• Posts that have been inserted/ deleted

Managing Growth

• More complecated → Chaos → Bad UX
• Query generations helps you

Query generations (WWDC 2016)

• Isolate contexts from completing work
• Provide a consistent, durable view of the database
• Requires WAL journal mode

Filtering Updates with Persistent History Tracking

• New in iOS 11 and macOS 10.13
• Persisted record of each transaction

Bulk Editing with Batch Operations

NSManagedObject.delete vs NSBatchDeleteRequest

Adopt NSSecureUnarchiveFromDataTransformerName

• Old — nil or NSKeyedUnarchiveFromDataTrasnformerName
• New — NSSecureUnarchiveFromDataTransformerName

Transparent for plist types

• Custom classes need a custom transformer

CoreData Debug Log

Performance Analysis with sqlite3