ios - SWIFT - KVO in xcode 6 beta 6.. observeValueForKeyPath no longer called -


i have been debugging app beta 3 beta 6

i cannot seem observevalueforkeypath called.. put breakpoint @ top of function , nothing happens

self.gamescene.viewcontroller.joystick.addobserver(self, forkeypath: "relativeposition", options: .new, context: nil)  override func observevalueforkeypath(keypath: string!, ofobject object: anyobject!, change: [nsobject : anyobject]!, context: unsafemutablepointer<void>) {      if keypath == "relativeposition" {     // code here      } }

this code working without hitch before.. has changed? can't work in more basic app.. there else need do?

a property has have word "dynamic" in front of observable now..

dynamic var relativeposition: cgpoint = cgpointzero

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