Fix the problem that can not be handling Notification

[tokorom]

Before

• I can not be handling UIApplicationDidBecomeActiveNotification and UIApplicationWillEnterForegroundNotification and others.

  After

• Fix it

[aleclarson]

Sorry, but your change would allow a NotificationListener with no target to be triggered no matter the target. Listeners with no target have a targetID equal to an empty string. If the NSNotification.object is equal to nil, hashify will return an empty string, thus working as expected.

You need to be using the UIApplication instance as the target for things to work correctly.

let didBecomeActive = Notification(UIApplicationDidBecomeActiveNotification)
didBecomeActive.once(UIApplication.sharedApplication()) {
  println("UIApplication became active: \($0)")
}

[tokorom]

Thank you for reply :)

I understand it.

[aleclarson]

:+1: