您好我有全球城市数据，即127960个城市。我试图将此数据插入应用程序数据库。大约需要20分钟。
//Here is code
private func FetchCountryList(){
var parameters = [String:AnyObject]()
if let rDate = Country.GetLatestDate() as NSNumber?{
parameters[RECORDED_DATE] = rDate.integerValue
}
WSRequest.SendRequest(WSMethod.POST, pramrDisc: parameters, paramsString:nil, operation: WSOperation.FetchCountryList, completionHandler: {response in
if let parsedObject = response.parsedObject as? [String:AnyObject]{
if let countries = parsedObject[OBJECT1]?[COUNTRIES] as? [[String:AnyObject]]{
let managedContext = CoreDataStack.sharedStack().backgroundContext
managedContext.performBlock({
for country in countries {
AddCountryInManagedObjectContext(country)
}
managedContext.saveContext()
self.completedDataBurning()
})
}
}
})
}
class func AddCountryInManagedObjectContext(user:[String:AnyObject]) {
if let countryId = user[COUNTRY_ID] as? Int{
let backgroundContext = CoreDataStack.sharedStack().backgroundContext
backgroundContext.performBlockAndWait({
let newItem = DatabaseManager.CreateOrUpdateItemFor(backgroundContext,entity: TABLE_COUNTRY, parameter: "countryId", value: countryId) as! Country
newItem.countryId = countryId
if let countryName = user[COUNTRY_NAME] as? String{
newItem.countryName = countryName.capitalizedString
}
if let currency = user[CURRENCY] as? String{
newItem.currency = currency.uppercaseString
}
if let currencyCode = user[CURRENCY_CODE] as? Int{
newItem.currencyCode = currencyCode
}
if let currencySymbol = user[CURRENCY_SYMBOL] as? String{
newItem.currencySymbol = currencySymbol
}
if let recordedBy = user[RECORDED_BY] as? String{
newItem.recordedBy = recordedBy.capitalizedString
}
if let recordedDate = user[RECORDED_DATE] as? Double{
newItem.recordedDate = recordedDate
}
if let status = user[STATUS] as? String{
if status == "D"{
DeleteRecord(backgroundContext,entityName: TABLE_COUNTRY, columnName: "countryId", recordId: "\(countryId)")
}
}
})
}
}
class func DeleteRecord(managedContext:NSManagedObjectContext,entityName:String,columnName:String,recordId:String) {
managedContext.performBlockAndWait({
//2
let fetchRequest = NSFetchRequest(entityName:entityName)
fetchRequest.includesPropertyValues = false
let predicateFormat = "\(columnName) = \(recordId)"
let resultPredicate = NSPredicate(format: predicateFormat)
fetchRequest.predicate = resultPredicate
//3
//var error: NSError?
do {
if let results = try managedContext.executeFetchRequest(fetchRequest) as? [NSManagedObject]{
for result in results{
managedContext.deleteObject(result)
}
}
try managedContext.save()
} catch let error as NSError {
print(error)
}
})
}
//Core data stack
import CoreData
let coreDataStack = CoreDataStack()
class CoreDataStack {
class func sharedStack() -> CoreDataStack{
return coreDataStack
}
// MARK: - Core Data stack
lazy var applicationDocumentsDirectory: NSURL = {
// The directory the application uses to store the Core Data store file. This code uses a directory named "in.appstute.TripOrb" in the application's documents Application Support directory.
let urls = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)
return urls[urls.count-1]
}()
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 = NSBundle.mainBundle().URLForResource("TripOrb", withExtension: "momd")!
return NSManagedObjectModel(contentsOfURL: modelURL)!
}()
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.URLByAppendingPathComponent("SingleViewCoreData.sqlite")
var failureReason = "There was an error creating or loading the application's saved data."
do {
try coordinator.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil)
} catch {
// Report any error we got.
var dict = [String: AnyObject]()
dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"
dict[NSLocalizedFailureReasonErrorKey] = failureReason
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 context: NSManagedObjectContext = {
// 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
var managedObjectContext = NSManagedObjectContext(concurrencyType: .MainQueueConcurrencyType)
managedObjectContext.persistentStoreCoordinator = coordinator
return managedObjectContext
}()
lazy var backgroundContext: NSManagedObjectContext = {
// 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
var managedObjectContext = NSManagedObjectContext(concurrencyType: .PrivateQueueConcurrencyType)
// managedObjectContext.persistentStoreCoordinator = coordinator
managedObjectContext.parentContext = self.context
return managedObjectContext
}()
// MARK: - Core Data Saving support
func saveContext () {
if context.hasChanges {
do {
try context.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()
}
}
}
func saveBackgroundContext () {
if backgroundContext.hasChanges {
do {
try backgroundContext.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()
}
}
}
}
extension NSManagedObjectContext {
func saveContext () {
if self.hasChanges {
do {
try self.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()
}
}
}
}