gistfile1.swift

//
//  ViewController.swift
//  OutletRetention
//
//  Created by Thomas Krajacic on 8.3.2015.
//  Copyright (c) 2015 Thomas Krajacic. All rights reserved.
//

import Cocoa

class ViewController: NSViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Do any additional setup after loading the view.
    }
    
    override var representedObject: AnyObject? {
        didSet {
            // Update the view, if already loaded.
        }
    }
    
    @IBAction func present(sender: NSButton) {
        
        let storyboard = NSStoryboard(name: "Main", bundle: nil)
        
        switch sender.title {
        case "A":
            let vc = storyboard?.instantiateControllerWithIdentifier("A") as! NSViewController
            self.showViewController(vc)
            
        case "B":
            let vc = storyboard?.instantiateControllerWithIdentifier("B") as! NSViewController
            self.showViewController(vc)
            
        default: break
        }
    }
    
    let animator = FadeTransitionAnimator()
    
    let swipe = FadeTransitionAnimator()
    
    func showViewController(viewController: NSViewController) {
        // hide all others
        self.dismissAllViewControllers()
        
        
        self.addChildViewController(viewController)
        // present new viewcontroller
        presentViewController(viewController, animator: swipe)
    }
    
    func dismissAllViewControllers() {
        if let previousVC = self.childViewControllers.last as? NSViewController {
            self.dismissViewController(previousVC)
            previousVC.removeFromParentViewController()
        }
        
    }
    
}