Alternative to NSUserDefaults write/read to filesystem (fix for glances in WatchKit on physical Apple Watch hardware)

db-manager

var sharedContainerURL = NSFileManager.defaultManager().containerURLForSecurityApplicationGroupIdentifier("group.com.company.project")!.URLByAppendingPathComponent("DB.plist")

func retrieve() -> AnyObject? {
  if let data = NSData(contentsOfURL: sharedContainerURL) {
    if let unarchived: AnyObject = NSKeyedUnarchiver.unarchiveObjectWithData(data) {
      return unarchived
    }
  }
  return nil
}

func save(object: AnyObject) {
  let data = NSKeyedArchiver.archivedDataWithRootObject(object)
  data.writeToURL(sharedContainerURL, atomically: true)
}

func destroy(){
  NSFileManager.defaultManager().removeItemAtURL(sharedContainerURL, error: nil)
}