Created
December 8, 2016 14:35
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CoredataStack iOS10 & <iOS10
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import Foundation | |
import CoreData | |
class CoreDataManager { | |
// MARK: - Core Data stack | |
static let sharedInstance = CoreDataManager() | |
private lazy var applicationDocumentsDirectory: URL = { | |
// The directory the application uses to store the Core Data store file. This code uses a directory named in the application's documents Application Support directory. | |
let urls = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask) | |
return urls[urls.count-1] | |
}() | |
private lazy var managedObjectModel: NSManagedObjectModel = { | |
// The managed object model for the application. This property is not optional. It is a fatal error for the application not to be able to find and load its model. | |
let modelURL = Bundle.main.url(forResource: "CoreDataSwift", withExtension: "momd")! | |
return NSManagedObjectModel(contentsOf: modelURL)! | |
}() | |
private lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator = { | |
// The persistent store coordinator for the application. This implementation creates and returns a coordinator, having added the store for the application to it. This property is optional since there are legitimate error conditions that could cause the creation of the store to fail. | |
// Create the coordinator and store | |
let coordinator = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel) | |
let url = self.applicationDocumentsDirectory.appendingPathComponent("CoreDataSwift.sqlite") | |
var failureReason = "There was an error creating or loading the application's saved data." | |
do { | |
// Configure automatic migration. | |
let options = [ NSMigratePersistentStoresAutomaticallyOption : true, NSInferMappingModelAutomaticallyOption : true ] | |
try coordinator.addPersistentStore(ofType: NSSQLiteStoreType, configurationName: nil, at: url, options: options) | |
} catch { | |
// Report any error we got. | |
var dict = [String: AnyObject]() | |
dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data" as AnyObject? | |
dict[NSLocalizedFailureReasonErrorKey] = failureReason as AnyObject? | |
dict[NSUnderlyingErrorKey] = error as NSError | |
let wrappedError = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict) | |
// Replace this with code to handle the error appropriately. | |
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. | |
NSLog("Unresolved error \(wrappedError), \(wrappedError.userInfo)") | |
abort() | |
} | |
return coordinator | |
}() | |
lazy var managedObjectContext: NSManagedObjectContext = { | |
var managedObjectContext: NSManagedObjectContext? | |
if #available(iOS 10.0, *){ | |
managedObjectContext = self.persistentContainer.viewContext | |
} | |
else{ | |
// Returns the managed object context for the application (which is already bound to the persistent store coordinator for the application.) This property is optional since there are legitimate error conditions that could cause the creation of the context to fail. | |
let coordinator = self.persistentStoreCoordinator | |
managedObjectContext = NSManagedObjectContext(concurrencyType: .mainQueueConcurrencyType) | |
managedObjectContext?.persistentStoreCoordinator = coordinator | |
} | |
return managedObjectContext! | |
}() | |
// iOS-10 | |
@available(iOS 10.0, *) | |
lazy var persistentContainer: NSPersistentContainer = { | |
/* | |
The persistent container for the application. This implementation | |
creates and returns a container, having loaded the store for the | |
application to it. This property is optional since there are legitimate | |
error conditions that could cause the creation of the store to fail. | |
*/ | |
let container = NSPersistentContainer(name: "CoreDataSwift") | |
container.loadPersistentStores(completionHandler: { (storeDescription, error) in | |
if let error = error as NSError? { | |
// Replace this implementation with code to handle the error appropriately. | |
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. | |
/* | |
Typical reasons for an error here include: | |
* The parent directory does not exist, cannot be created, or disallows writing. | |
* The persistent store is not accessible, due to permissions or data protection when the device is locked. | |
* The device is out of space. | |
* The store could not be migrated to the current model version. | |
Check the error message to determine what the actual problem was. | |
*/ | |
fatalError("Unresolved error \(error), \(error.userInfo)") | |
} | |
}) | |
print("\(self.applicationDocumentsDirectory)") | |
return container | |
}() | |
// MARK: - Core Data Saving support | |
func saveContext () { | |
if managedObjectContext.hasChanges { | |
do { | |
try managedObjectContext.save() | |
} catch { | |
// Replace this implementation with code to handle the error appropriately. | |
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. | |
let nserror = error as NSError | |
NSLog("Unresolved error \(nserror), \(nserror.userInfo)") | |
abort() | |
} | |
} | |
} | |
} |
Thank you so much for the code you posted here. I am not sure if you meant for it to be public. Is it OK to use it?
jude
@scdi sorry for late reply, feel free to use it
That is a great example for CoreData
@pacoyang thanks for the comment
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hi, how to access app group container with core data stack for ios 10... with
static let applicationGroupIdentifier = "com.fetchDatainExtension"
if let newURL =
FileManager.default.containerURL(
forSecurityApplicationGroupIdentifier: "group.com.fetchDatainExtension.contacts") {
url = newURL
}