UPDATE: to save your time - this is Swift 1.2 solution. I didn't test it on Swift 2 (likely secureValue flow have to be updated)
Looks like you are talking about user's details/profile (correct me if I wrong), for this amount of data - using NSUserDefault is totally ok.
For user preferences (if that the case!!) I would use something like Preference Manager:
import Foundation
import Security
class PreferencesManager {
class func saveValue(value: AnyObject?, key: String) {
NSUserDefaults.standardUserDefaults().setObject(value, forKey: key)
NSUserDefaults.standardUserDefaults().synchronize()
}
class func loadValueForKey(key: String) -> AnyObject? {
let r : AnyObject? = NSUserDefaults.standardUserDefaults().objectForKey(key)
return r
}
class func saveSecureValue(value: String?, key: String) {
var dict = dictForKey(key)
if let v = value {
var data: NSData = v.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!
(SecItemDelete(dict as NSDictionary as CFDictionary))
dict[kSecValueData as NSString] = v.dataUsingEncoding(NSUTF8StringEncoding,
allowLossyConversion:false);
var status = SecItemAdd(dict as NSDictionary as CFDictionary, nil)
} else {
var status = SecItemDelete(dict as NSDictionary as CFDictionary)
}
}
class func loadSecureValueForKey(key: String) -> String? {
var dict = dictForKey(key)
dict[kSecReturnData as NSString] = kCFBooleanTrue
var dataRef: Unmanaged<AnyObject>?
var value: NSString? = nil
var status = SecItemCopyMatching(dict as NSDictionary as CFDictionary, &dataRef)
if 0 == status {
let opaque = dataRef?.toOpaque()
if let op = opaque {
value = NSString(data: Unmanaged<NSData>.fromOpaque(op).takeUnretainedValue(),
encoding: NSUTF8StringEncoding)
}
}
let val :String? = value as? String
return val
}
class private func dictForKey(key: String) -> NSMutableDictionary {
var dict = NSMutableDictionary()
dict[kSecClass as NSString] = kSecClassGenericPassword as NSString
dict[kSecAttrService as NSString] = key
return dict
}
}
You can use
PreferencesManager.saveSecureValue for secure data (like password etc) and
PreferencesManager.saveValue for the rest of values
