Core Data Migration @zeeshan_khan 

Core Data • What is it? • A Framework, APIs • Why shall we use it over sqlite? • All objects, SQL-less queries, Lesser time... • How does it work? 

Core Data Terms • A Model • A Store • A Coordinator • A Context Managed Object Context Persistent Store Coordinator Persistent Store Managed Object Model 

Problem & Solution 

Migration • When is it required? • Requirements for migration. • Changes that don’t require migration. • How it works? • Initialization of Core Data • The Process... 

Migration Ways • Lightweight • ’s Term, Less work, Simple Changes... • Manual • A little more work, need mapping model • Custom (For complex transformation) • Fully Manual 

Lightweight • Adding a version • Migrating with code 

Manual • Adding a version • Adding a mapping model • Migrating with code 

Manual Demo 

The mo-generator 

What next? 

References • iWrite (Presentation Data) • iCode (Sample Code) 

Thanks!