Flip view, container v. noContainer

ViewController

//
//  ViewController.swift
//  C4Swift
//
//  Created by travis on 2014-10-28.
//  Copyright (c) 2014 C4. All rights reserved.
//

import UIKit
import C4UI
import C4Core
import C4Animation

class ViewController: C4CanvasController {
    var b = true

    override func setup() {
        //noContainer()
        container()
    }

    func noContainer() {
        let v1 = C4View(frame: C4Rect(0,0,100,100))
        v1.backgroundColor = blue

        let v2 = C4View(frame:v1.frame)
        v2.backgroundColor = red
        v2.hidden = true

        canvas.add(v1)
        canvas.add(v2)

        canvas.addTapGestureRecognizer { (location, state) -> () in
            var from = v1
            var to = v2
            var options = UIViewAnimationOptions.BeginFromCurrentState
            if self.b {
                options |= UIViewAnimationOptions.TransitionFlipFromLeft
            }
            else {
                from = v2
                to = v1
                options |= UIViewAnimationOptions.TransitionFlipFromRight
            }
            from.hidden = true
            to.hidden = false
            UIView.transitionFromView(from.view, toView: to.view, duration: 0.25, options: UIViewAnimationOptions.TransitionFlipFromRight, completion: nil)

            self.b = !self.b
        }

    }

    func container() {
        let c = C4View(frame: C4Rect(0,0,100,100))
        let v1 = C4View(frame: c.frame)
        v1.backgroundColor = blue

        let v2 = C4View(frame:c.frame)
        v2.backgroundColor = red
        v2.hidden = true

        c.add(v1)
        c.add(v2)
        canvas.add(c)

        canvas.addTapGestureRecognizer { (location, state) -> () in
            var from = v1
            var to = v2
            var options = UIViewAnimationOptions.BeginFromCurrentState
            if self.b {
                options |= UIViewAnimationOptions.TransitionFlipFromLeft
            }
            else {
                from = v2
                to = v1
                options |= UIViewAnimationOptions.TransitionFlipFromRight
            }
            from.hidden = true
            to.hidden = false
            UIView.transitionFromView(from.view, toView: to.view, duration: 0.25, options: UIViewAnimationOptions.TransitionFlipFromRight, completion: nil)

            self.b = !self.b
        }
    }
}