Don't use Swift enums to box magic strings! Read the blog post: http://www.chibicode.org/?p=16

EnumExample.swift

enum NotificationNames: String {
  case UserDataChanged: "UserDataChangedNotificationName"
  case ReceivedAlert: "ReceivedAlertNotificationName"
  case PeanutButterJellyTime: "ItsPeanutButterJellyTimeNotificationName"
}

StructExample.swift

struct NotificationNames {
  static let userDataChanged = "UserDataChangedNotificationName"
  static let receivedAlert = "ReceivedAlertNotificationName"
  static let peanutButterJellyTime = "ItsPeanutButterJellyTimeNotificationName"
}

Usage.swift

// Using the enum:
NSNotificationCenter.defaultCenter().postNotificationName(NotificationNames.UserDataChanged.rawValue, object:nil)

// Using the struct
NSNotificationCenter.defaultCenter().postNotificationName(NotificationNames.userDataChanged, object:nil)

// If you need switching, remember that Swift can switch on just about any comparison type:
func handleNotification(note: NSNotification) {
  switch note.name {
    case NotificationNames.userDataChanged: print("User data changed!")
    case NotificationNames.receivedAlert: print("WHAT!? An alert!")
    case NotificationNames.peanutButterJellyTime: print("Where ya at? Where ya at? Where ya at?")
    default: print("I have no idea what's going on.")
  }
}