NSCoding benutzerdefinierte Objekt Kind Array nicht persistent

Question

Ich habe zwei Klassen: Kontakt und Bill. Kontakt hat eine Reihe von Typ Bill.

Wenn ich mit NSKeyedArchiver beharrlich bleiben meine persistent gut erhalten, aber es bleibt nicht das Bill-Array.

Jedes Mal, wenn ich eine Rechnung oder einen Kontakt hinzufügen, rufe ich die insertNewObject() Methode in persist auf. meine Klassen

sind hier:

/* Persist.swift */ 
import Foundation 

class Persist { 

    static let sharedInstance = Persist() 

    let delegate = UIApplication.sharedApplication().delegate as! AppDelegate 
    var contactsFilePath : String { 
     let manager = NSFileManager.defaultManager() 
     let url = manager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask).first! as NSURL 
     return url.URLByAppendingPathComponent("\(delegate.userId):objectsArrayz").path! 
    } 

    func insertNewObject(){ 
     NSKeyedArchiver.archiveRootObject(delegate.contacts!, toFile: contactsFilePath) 

    } 

    func retreieveContracts(){ 
     if let array = NSKeyedUnarchiver.unarchiveObjectWithFile(contactsFilePath) as? [Contact] { 
      delegate.contacts = array 
     } 
    } 

    func deleteContact(rowNum : Int){ 
     delegate.contacts!.removeAtIndex(rowNum) 
     NSKeyedArchiver.archiveRootObject(delegate.contacts!, toFile: contactsFilePath) 
    } 

/* Contact.swift */  
import Foundation 

class Contact : NSObject, NSCoding{ 

    var image : UIImage? 
    var firstName : String? 
    var lastName : String? 
    var email : String? 
    var phoneNumber : String? 
    var address : String? 
    var bills : [Bill]? 

    init(image: UIImage, firstName : String, lastName : String, email : String, phoneNumber : String, address : String, bills : [Bill]) { 
     self.image = image 
     self.firstName = firstName 
     self.lastName = lastName 
     self.email = email 
     self.phoneNumber = phoneNumber 
     self.address = address 
     self.bills = bills 
    } 

    // MARK: NSCoding 

    required convenience init?(coder decoder: NSCoder) { 
     guard let image = decoder.decodeObjectForKey("image") as? UIImage, 
      let firstName = decoder.decodeObjectForKey("firstName") as? String, 
      let lastName = decoder.decodeObjectForKey("lastName") as? String, 
      let email = decoder.decodeObjectForKey("email") as? String, 
      let phoneNumber = decoder.decodeObjectForKey("phoneNumber") as? String, 
      let address = decoder.decodeObjectForKey("address") as? String, 
      let bills = decoder.decodeObjectForKey("bills") as? [Bill] 
     else { 
       return nil 
     } 

     self.init(
      image: image, 
      firstName: firstName, 
      lastName : lastName, 
      email : email, 
      phoneNumber : phoneNumber, 
      address : address, 
      bills : bills 

     ) 
    } 

    func encodeWithCoder(coder: NSCoder) { 
     coder.encodeObject(self.image, forKey: "image") 
     coder.encodeObject(self.firstName, forKey: "firstName") 
     coder.encodeObject(self.lastName, forKey: "lastName") 
     coder.encodeObject(self.email, forKey: "email") 
     coder.encodeObject(self.phoneNumber, forKey: "phoneNumber") 
     coder.encodeObject(self.address, forKey: "address") 
     coder.encodeObject(self.bills, forKey: "bills") 
    } 
} 


/* Bill.swift*/ 
import Foundation 

class Bill : NSObject, NSCoding{ 

    var service : String? 
    var subtotal : Double? 
    var taxes : Double? 
    var total : Double? 


    init(service : String, subtotal : Double, taxes : Double, total: Double) { 
     self.service = service 
     self.subtotal = subtotal 
     self.taxes = taxes 

    } 

    // MARK: NSCoding 

    required convenience init?(coder decoder: NSCoder) { 

     guard let service = decoder.decodeObjectForKey("service") as? String, 
      let subtotal = decoder.decodeObjectForKey("subtotal") as? Double, 
      let taxes = decoder.decodeObjectForKey("taxes") as? Double, 
      let total = decoder.decodeObjectForKey("total") as? Double 

      else { 
       return nil 
     } 


     self.init(
      service: service, 
      subtotal: subtotal, 
      taxes: taxes, 
      total: total 

     ) 
    } 

    func encodeWithCoder(coder: NSCoder) { 
     coder.encodeObject(self.service, forKey: "service") 
     coder.encodeObject(self.subtotal, forKey: "subtotal") 
     coder.encodeObject(self.taxes, forKey: "taxes") 
     coder.encodeObject(self.total, forKey: "total") 
    } 
} 

Answer 1

Ein Aufruf super.init() in dem erforderlichen Init-Methode der serialisierbaren Klasse.

Snippet von Bill.swift

required init?(coder decoder: NSCoder) { 
     super.init() 
     service = decoder.decodeObjectForKey("service") as? String 
     subtotal = decoder.decodeObjectForKey("subtotal") as? Double 
     taxes = decoder.decodeObjectForKey("taxes") as? Double 
     total = decoder.decodeObjectForKey("total") as? Double 
     services = decoder.decodeObjectForKey("services") as? [Service] 
    } 

Answer 2

Hier ist eine Anleitung aus dem Apple-Entwickler-Dokumentation (in Objective-c):

Diskussion Sie müssen sich selbst von initWithCoder zurückkehren :. Wenn Sie eine erweiterte Notwendigkeit haben, die ein anderes Objekt nach Decodierung erfordert ersetzen, können Sie dies in awakeAfterUsingCoder tun:

https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/Archiving/Articles/codingobjects.html

- (void)encodeWithCoder:(NSCoder *)coder { 
    [super encodeWithCoder:coder]; 
    // Implementation continues 
} 

- (id)initWithCoder:(NSCoder *)coder { 
    self = [super init]; 
    if (self) { 
     _firstName = [coder decodeObjectForKey:ASCPersonFirstName]; 
     _lastName = [coder decodeObjectForKey:ASCPersonLastName]; 
     _height = [coder decodeFloatForKey:ASCPersonHeight]; 
    } 
    return self; 
}