ios - EXC_BAD_ACCESS with viewWillTransitionToSize and Xcode 7 -

i exc_bad_access viewwilltransitiontosize in xcode 7. solution posted here exc_bad_access viewwilltransitiontosize , xcode 6.3 worked untill upgraded xcode 7.

override func viewwilltransitiontosize(size: cgsize, withtransitioncoordinator coordinator:   uiviewcontrollertransitioncoordinator) {     super.viewwilltransitiontosize(size, withtransitioncoordinator: coordinator)      if let safecoordinator = coordinator uiviewcontrollertransitioncoordinator?     {         // error: exc_bad_access here         print("coordinator != nil")         safecoordinator.animatealongsidetransition({ context in             self.tableview.frame = cgrectmake(0, 0, size.width, size.height)         }, completion: nil)      } else {         print("coordinator == nil")     } } 

any appriciated.