uinavigationcontroller - NavigationController.pushViewController in Custom Segue does not work - Swift 2.0 - iOS 9.1 -

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i'm writing custom segue in uistoryboardsegue. use catransition create right left custom animation. if used sourceviewcontroller.navigationcontroller?.pushviewcontroller(destinationviewcontroller, animated: false);, not take me second view. performs right left animation , stays on first view. have debugged code, , found sourceviewcontroller.navigationcontroller nil. have uinavigationcontroller between first view , second view.

i have tried replace line of code sourceviewcontroller.presentviewcontroller(destinationviewcontroller, animated: false, completion: nil);. transition happen, happens fast can't see right left animation.

my complete code in uistoryboardsegue following:

override func perform() {       let sourceviewcontroller = self.sourceviewcontroller uiviewcontroller;     let destinationviewcontroller = self.destinationviewcontroller uiviewcontroller;     let transition: catransition = catransition()      transition.duration = 0.25;     transition.timingfunction = camediatimingfunction(name: kcamediatimingfunctioneaseineaseout)     transition.type = kcatransitionpush;     transition.subtype = kcatransitionfromright;      sourceviewcontroller.view.layer.addanimation(transition, forkey: "kcatransition")      sourceviewcontroller.navigationcontroller?.pushviewcontroller(destinationviewcontroller, animated: false); }

thank help

using sourceviewcontroller.pushviewcontroller correct. reason getting nil sourceviewcontroller.navigationcontroller that, placed navigation controller between first view , second view. correct way of placing navigation controller place before first view.

this correct way of placing navigation controller:


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