ios - pushViewController not working in swift 3 -


i using storyboard , xib in swift 3 (ios 10 , xcode 8). , when load view controller xib, application crashing.

here code, using load view controller on button action:

let serverviewcontroller = serverviewcontroller(nibname: "serverviewcontroller", bundle: nil) self.navigationcontroller?.pushviewcontroller(serverviewcontroller, animated: true)

if serverviewcontroller nibname correct, problem trying push navigation controller. mean serverviewcontroller should uinavigationcontroller subclass in case, can't push navigation controller.


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