In Swift, switch the controller inside the Uicontainerview

As below, a uicontainerview within the switch two controller, when clicked Login Uicontainerview view is Logincontroller, When you click Register, the view in Uicontainerview is Registercontroller

Do two button events first in the main view. That's needless to say. When the button event is triggered, the following code can be called.

var Newcontroller = Self.storyboard?. Instantiateviewcontrollerwithidentifier ("Registercontroller") as! Registercontroller let            oldcontroller = Childviewcontrollers.last as! Uiviewcontroller                        Oldcontroller.willmovetoparentviewcontroller (nil)            Addchildviewcontroller ( Newcontroller)            newController.view.frame = oldController.view.frame            //isanimating = True            Transitionfromviewcontroller (Oldcontroller, Toviewcontroller:newcontroller, duration:0.1, Options: Uiviewanimationoptions.transitionnone, Animations:nil, completion: {(finished), Void                    in Oldcontroller.removefromparentviewcontroller ()                    newcontroller.didmovetoparentviewcontroller (self)                    // Self.isanimating = False            })

In Swift, switch the controller inside the Uicontainerview