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Relationships - core data
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| let modelURL = | |
| NSBundle.mainBundle().URLForResource("myDevices", withExtension: "Momd")! | |
| return NSManagedObjectModel(contentsOfURL: modelURL)! | |
| }() | |
| lazy var persistentStoreCoordinator: | |
| NSPersistentStoreCoordinator = { | |
| let coordinator = NSPersistentStoreCoordinator | |
| (managedObjectModel: self.managedObjectModel) | |
| let url = self.applicationDocumentDirectory. | |
| URLByAppendingPathComponent("SingleViewCoreData.sqlite") | |
| var failureReason = "There was an error creating or loading the application's saved data." | |
| do { | |
| try coordinator.addPersistenStoreWithType (NSSQLiteStoreType, | |
| configuration: nil, URL: url, options: | |
| [NSMigratePersistentStoresAutomaticallyOption: true, | |
| NSInferMappingModelAutomaticallyOption: true]) | |
| } catch { | |
| var dict = [String: AnyObject]() | |
| dict[NSLocalisedDescriptionKey] = "Failed to initialize the application's saved data" | |
| dict[NSUnderlyingErrorKey] = error as NSError | |
| let wrappedError = NSError(domain: | |
| "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict) | |
| NSLog("Unresolved error \(wrappedError), \(wrappedError.userInfo)") | |
| abort() | |
| } | |
| return coordinator | |
| }() | |
| lazy var managedObjectContext: NSManagedObjectContext { | |
| } |
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| --- add relationships | |
| Device - Owner, Destination - Person, leave optional | |
| Persion - Devices, Destination - Device, Inverse - Owner, not optional, Type - to many | |
| Editor > Create NSManagedObjects Subclass, both | |
| In Devices.swift | |
| var deviceDescription: String { | |
| return "\(name) (\(deviceType))" | |
| } | |
| Remember again to remove the question mark from Person - name, devices. Device - all Strings |
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| import UIKit | |
| import CoreData | |
| protocol PersonPickerDelegate: class { | |
| func didSelectPerson(person: Person) | |
| } | |
| @objcMembers | |
| class PeopleTableViewController: UITableViewController { | |
| var managedObjectContext: NSManagedObjectContext! | |
| var people = [Person]() | |
| // for person select mode | |
| weak var pickerDelegate: PersonPickerDelegate? | |
| var selectedPerson: Person? | |
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