Introducere în Core Data

Scurtă prezentare a componentelor și a modului de lucru în Core Data

Transcript

1. Core Data Introducere în sâmbătă, 21 septembrie 13
2. Core Data sâmbătă, 21 septembrie 13
3. sâmbătă, 21 septembrie 13
4. sâmbătă, 21 septembrie 13
5. “[...]object life-cycle and object graph management, including persistence.” sâmbătă, 21 septembrie 13
6. #import <Foundation/Foundation.h> @class Manager, Department; @interface Employee : NSObject @property (nonatomic, strong) NSString *firstName; @property (nonatomic, strong) NSString *lastName; @property (nonatomic, strong) Manager *manager; @property (nonatomic, strong) Department *department; @end Un exemplu sâmbătă, 21 septembrie 13
7. #import <Foundation/Foundation.h> #import <CoreData/CoreData.h> @class Manager, Department; @interface Employee : NSManagedObject @property (nonatomic, retain) NSString *firstName; @property (nonatomic, retain) NSString *lastName; @property (nonatomic, retain) Manager *manager; @property (nonatomic, retain) Department *department; @end Un exemplu sâmbătă, 21 septembrie 13
8. Stiva Managed Object Context Managed Object Model Persistent Store Coordinator Persistent Object Store Store File “A collection of managed objects” “A collection of entity descriptions” “A collection of stores” “A collection of object data” sâmbătă, 21 septembrie 13
9. •NSPersistentStoreCoordinator •NSManagedObjectModel •NSManagedObject •NSManagedObjectContext •NSFetchRequest Clase sâmbătă, 21 septembrie 13
10. •NSPersistentStoreCoordinator •NSManagedObjectModel •NSManagedObject •NSManagedObjectContext •NSFetchRequest Clase sâmbătă, 21 septembrie 13
11. •NSPersistentStoreCoordinator •NSManagedObjectModel •NSManagedObject •NSManagedObjectContext •NSFetchRequest Clase @interface Employee : NSManagedObject @property (nonatomic, retain) NSString *firstName; @property (nonatomic, retain) NSString *lastName; @property (nonatomic, retain) Manager *manager; @property (nonatomic, retain) Department *department; @end sâmbătă, 21 septembrie 13
12. •NSPersistentStoreCoordinator •NSManagedObjectModel •NSManagedObject •NSManagedObjectContext •NSFetchRequest Clase ??? sâmbătă, 21 septembrie 13
13. Clase •NSPersistentStoreCoordinator •NSManagedObjectModel •NSManagedObject •NSManagedObjectContext •NSFetchRequest sâmbătă, 21 septembrie 13
14. Clase •NSPersistentStoreCoordinator •NSManagedObjectModel •NSManagedObject •NSManagedObjectContext •NSFetchRequest sâmbătă, 21 septembrie 13
15. Clase •NSPersistentStoreCoordinator •NSManagedObjectModel •NSManagedObject •NSManagedObjectContext •NSFetchRequest sâmbătă, 21 septembrie 13
16. Clase •NSPersistentStoreCoordinator •NSManagedObjectModel •NSManagedObject •NSManagedObjectContext •NSFetchRequest sâmbătă, 21 septembrie 13
17. •NSPersistentStoreCoordinator •NSManagedObjectModel •NSManagedObject •NSManagedObjectContext •NSFetchRequest Clase •NSPredicate •NSEntityDescription •NSFetchedResultsController sâmbătă, 21 septembrie 13
18. NSManagedObjectContext “A collection of managed objects” sâmbătă, 21 septembrie 13
19. Un exemplu “Set buying date for 2nd monitor to be 2015 for all employees hired in 2013” sâmbătă, 21 septembrie 13
20. NSFetchRequest *fr = [[NSFetchRequest alloc] initWithEntityName:@"Employee"]; NSPredicate *p = [NSPredicate predicateWithFormat:@"hiringYear == 2013"]; [fr setPredicate:p]; NSSortDescriptor *sd = [NSSortDescriptor sortDescriptorWithKey:@”lastName” ascending:YES]; [fr setSortDescriptors:@[sd]]; NSError *error; NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error]; sâmbătă, 21 septembrie 13
21. NSFetchRequest *fr = [[NSFetchRequest alloc] initWithEntityName:@"Employee"]; NSPredicate *p = [NSPredicate predicateWithFormat:@"hiringYear == 2013"]; [fr setPredicate:p]; NSSortDescriptor *sd = [NSSortDescriptor sortDescriptorWithKey:@”lastName” ascending:YES]; [fr setSortDescriptors:@[sd]]; NSError *error; NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error]; sâmbătă, 21 septembrie 13
22. NSFetchRequest *fr = [[NSFetchRequest alloc] initWithEntityName:@"Employee"]; NSPredicate *p = [NSPredicate predicateWithFormat:@"hiringYear == 2013"]; [fr setPredicate:p]; NSSortDescriptor *sd = [NSSortDescriptor sortDescriptorWithKey:@”lastName” ascending:YES]; [fr setSortDescriptors:@[sd]]; NSError *error; NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error]; sâmbătă, 21 septembrie 13
23. NSFetchRequest *fr = [[NSFetchRequest alloc] initWithEntityName:@"Employee"]; NSPredicate *p = [NSPredicate predicateWithFormat:@"hiringYear == 2013"]; [fr setPredicate:p]; NSSortDescriptor *sd = [NSSortDescriptor sortDescriptorWithKey:@”lastName” ascending:YES]; [fr setSortDescriptors:@[sd]]; NSError *error; NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error]; sâmbătă, 21 septembrie 13
24. NSFetchRequest *fr = [[NSFetchRequest alloc] initWithEntityName:@"Employee"]; NSPredicate *p = [NSPredicate predicateWithFormat:@"hiringYear == 2013"]; [fr setPredicate:p]; NSSortDescriptor *sd = [NSSortDescriptor sortDescriptorWithKey:@”lastName” ascending:YES]; [fr setSortDescriptors:@[sd]]; NSError *error; NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error]; lastName: Pop buyDate: nil lastName: Furtuna buyDate: nil sâmbătă, 21 septembrie 13
25. for (Employee *e in fetchedObjects) { e.buyDate = 2015; } lastName: Pop buyDate: nil lastName: Furtuna buyDate: nil lastName: Pop buyDate: nil lastName: Furtuna buyDate: nil Context Store sâmbătă, 21 septembrie 13
26. for (Employee *e in fetchedObjects) { e.buyDate = 2015; } lastName: Pop buyDate: 2015 lastName: Furtuna buyDate: 2015 lastName: Pop buyDate: nil lastName: Furtuna buyDate: nil Context Store sâmbătă, 21 septembrie 13
27. -save: for (Employee *e in fetchedObjects) { e.buyDate = 2015; } NSError *error; [self.managedObjectContext save:&error]; lastName: Pop buyDate: 2015 lastName: Furtuna buyDate: 2015 lastName: Pop buyDate: 2015 lastName: Furtuna buyDate: 2015 Context Store sâmbătă, 21 septembrie 13
28. Demo Object graph management sâmbătă, 21 septembrie 13
29. Features sâmbătă, 21 septembrie 13
30. Change tracking and undo support sâmbătă, 21 septembrie 13
31. Change tracking and undo support Relationship maintenance sâmbătă, 21 septembrie 13
32. Change tracking and undo support Relationship maintenance Faulting sâmbătă, 21 septembrie 13
33. Change tracking and undo support Relationship maintenance Faulting Automatic validation sâmbătă, 21 septembrie 13
34. Change tracking and undo support Relationship maintenance Faulting Automatic validation Schema migration sâmbătă, 21 septembrie 13
35. Change tracking and undo support Relationship maintenance Faulting Automatic validation Schema migration NSFetchedResultsController sâmbătă, 21 septembrie 13
36. Change tracking and undo support Relationship maintenance Faulting Automatic validation Schema migration NSFetchedResultsController Full KVO, KVC support sâmbătă, 21 septembrie 13
37. Change tracking and undo support Relationship maintenance Faulting Automatic validation Schema migration NSFetchedResultsController Full KVO, KVC support Merge policies NSPredicate querying External data repositories iCloud integration sâmbătă, 21 septembrie 13
38. Surse http://en.wikipedia.org/wiki/Core_Data http://developer.apple.com/library/ios/#documentation/ DataManagement/Conceptual/iPhoneCoreData01/Introduction/ Introduction.html http://cocoadevcentral.com/articles/000086.php sâmbătă, 21 septembrie 13