ios - Container View Not Moving Off Screen -

i have container view want off bottom of screen. should easy, seem missing fundamental. have done similar moving controls off left side of screen with:

control.center.x -= view.bounds.width 

i have simple storyboard setup:

and view controller looks this:

class viewcontroller: uiviewcontroller {      @iboutlet var containerview: uiview!      override func viewwillappear(animated: bool) {         super.viewwillappear(animated)         containerview.center.y += view.bounds.height     } } 

when run, container view right shows in storyboard , not offscreen. setting containerview's center.y specific value such containerview.center.y = 50 nothing. way can show off screen adding animation in viewdidappear:

override func viewdidappear(animated: bool) {    super.viewdidappear(animated)    uiview.animatewithduration(0, animations: {self.containerview.center.y += self.view.bounds.height}) } 

but seems workaround , not proper way it. have been dealing hours, reading blogs, reading other stackoverflow questions, cannot find solution. not have constraints on container, although did test constraints , did not make difference. appreciated.

it possible main view's `layoutsubviews called after reposition container view, default position specified in storyboard.

the proper way have proper layout constraints in storyboard, make outlet bottom edge constraint , set constraint's constant property.