The problem is in your code, i have faced with this too. Look at my old code
let keyboardNib = UINib(nibName: "ChatCustomKeyboardView", bundle: nil)
customKeyboardView = keyboardNib.instantiateWithOwner(self, options: nil)[0] as! UIView
view.addSubview(customKeyboardView)
Then i changed it to this
let nib = UINib(nibName: "ChatCustomKeyboardView", bundle: nil)
let objects = nib.instantiateWithOwner(self, options: nil)
view = objects[0] as! UIView;
and everything start working. So try to assign your view but not add as subview.