画面切替

snapshotViewとの組み合わせでいける。

          let currentView = self.view.snapshotView(afterScreenUpdates: true)!
          self.view.addSubview(currentView)
          UIView.transition(with: currentView, duration: 0.5, options: [.transitionFlipFromRight], animations: {
                currentView.frame = CGRect(origin: CGPoint(x:-self.view.frame.width, y:currentView.frame.origin.y), size: currentView.frame.size)
            } , completion: { _ in
                    currentView.removeFromSuperview()
            })