Core Data初试

CoreDataStack.swift

import CoreData

class CoreDataStack: NSObject {

let context: NSManagedObjectContext

let coordinator: NSPersistentStoreCoordinator

let model: NSManagedObjectModel

let store: NSPersistentStore?

static func defaultStack()->CoreDataStack{

return instance

}

private static let instance = CoreDataStack()

private override init() {

//构建托管对象模型

let bundle=NSBundle.mainBundle()

let modelURL=bundle.URLForResource("Test", withExtension:"momd")!

model=NSManagedObjectModel(contentsOfURL: modelURL)!

//构建持久化存储助理

coordinator=NSPersistentStoreCoordinator(managedObjectModel:model)

//构建托管对象上下文，并且将助理连接到上下文

context=NSManagedObjectContext(concurrencyType:.MainQueueConcurrencyType)

context.persistentStoreCoordinator=coordinator

//构建持久化存储

let manager=NSFileManager.defaultManager()

let urls=manager.URLsForDirectory(.DocumentDirectory,inDomains:.UserDomainMask)

let documentsURL=urls.first!

let storeURL=documentsURL.URLByAppendingPathComponent("Test")

store=(try! coordinator.addPersistentStoreWithType(NSSQLiteStoreType,configuration:nil,URL:storeURL, options:nil))

}

func saveContext(){

if context.hasChanges{

do{

try context.save()

}catch{

print("Save failed......")

}

}

}

}