我想列出来自UIViewController的输出转场，如ProgrammaticallyenumerateoutgoingSeguesforaUIViewController中所述，但在Swift中。(swift2、Xcode7、iOS8+)。我可以overridefuncviewDidLoad(){super.viewDidLoad()lets=valueForKey("storyboardSegueTemplates")print("switchingVC:segues:\(s)")}并且产生类似的输出switchingVC:segues:Optional(("","",""))