HardCoreData

HardCoreData is a yet another core data stack based on Marcus Zarra's multithreading approach. This smart approach uncouples the writing into its own private queue and keeps the UI smooth as button.

HardCoreData consists of two fundamentals: HCDCoreDataStack and HCDCoreDataStackController.

HCDCoreDataStack

Incapsulates native CoreData stack setup.

/* Convenience initializers */

+ (instancetype)binaryStackWithName:(NSString *)modelName;
+ (instancetype)inMemoryStackWithName:(NSString *)modelName;
+ (instancetype)sqliteStackWithName:(NSString *)modelName;
+ (instancetype)stackWithModelName:(NSString *)modelName storeType:(NSString *)storeType;

/**
 *  Designated initializer
 *
 *  @param modelName NSString
 *  @param storeType NSString
 *
 *  @return HCDCoreDataStack
 */

- (instancetype)initWithModelName:(NSString *)modelName storeType:(NSString *)storeType NS_DESIGNATED_INITIALIZER;

HCDCoreDataStack protocol

Since HCDCoreDataStack is a protocol as well as a class, you can create your own custom stacks, by implementing protocol.

@protocol HCDCoreDataStack <NSObject>

@required

/* Represents current store coordinator */
@property (nonatomic, strong, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator;

/* Represents currentm object model */
@property (nonatomic, strong, readonly) NSManagedObjectModel *managedObjectModel;

/* Represents your single source of truth. Associated with main queue. */
@property (nonatomic, strong, readonly) NSManagedObjectContext *mainManagedObjectContext;

@end

HCDCoreDataStackController

The controller to instantiate child MOCs and save the while chain to the persistent store.

/**
 *  Designated initializer
 *
 *  @param stack HCDCoreDataStack
 *
 *  @return HCDCoreDataStackController
 */
- (instancetype)initWithStack:(id <HCDCoreDataStack>)stack NS_DESIGNATED_INITIALIZER;

/**
 * Instantiates new child context with given concurrency type.
 * You are responsive for retaining.
 */
- (NSManagedObjectContext *)createChildContextWithType:(NSManagedObjectContextConcurrencyType)type;

/**
 *  Saves the main context and pushes changes to the store.
 *  Its thread-safe to call it.
 */
- (void)save;

The whole pattern

/* Create core data stack */
HCDCoreDataStack *stack = [HCDCoreDataStack sqliteStackWithName:@"Model"];
HCDCoreDataStackController *coreDataController = [HCDCoreDataStackController controllerWithStack:stack];

NSManagedObjectContext *backgroundContext = [coreDataController createChildContextWithType:NSPrivateQueueConcurrencyType];
  [backgroundContext performBlock:^{
   
    Person *person = [NSEntityDescription insertNewObjectForEntityForName:NSStringFromClass([Person class]) inManagedObjectContext:backgroundContext];
    person.firstName = @"John";
    person.lastName = @"Doe";
    
    /* Save child context */
    [backgroundContext save:nil];
    
    /* Save data to store */
    [coreDataController save];
}];

Checkout Example folder for complete example.

Usage

To run the example project, clone the repo, and run pod install from the Example directory first.

Installation

HardCoreData is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "HardCoreData"

Author

Serg Krivoblotsky, krivoblotsky@me.com

History

See Releases

License

HardCoreData is available under the MIT license. See the LICENSE file for more info.

DDany/HardCoreData