The scaffold to my YAPT_Swift application.

YAPTMainViewController.swift

import UIKit

class YAPTMainViewController: UIViewController {

    // MARK: - Types
    private enum IntervalType { case Work, Break }
    private typealias Interval = (type:IntervalType, duration:Double)
    
    // MARK: - UI Properties
    @IBOutlet weak var timerLabel: UILabel!
    @IBOutlet weak var timerButton: UIButton!
    @IBOutlet var timerView: UIView!
    @IBInspectable var breakColor = UIColor(red: 48/255.0, green: 119/255.0, blue: 198/255.0, alpha: 1.0)
    @IBInspectable var workColor = UIColor(red: 194/255, green: 49/255.0, blue: 52/255.0, alpha: 1.0)
    
    // MARK: - Properties
    private var timer = NSTimer()
    private var schedule = [Interval]()
    private let timerInterval: NSTimeInterval = 1.0
    private var currentIntervalStartTime = NSDate()
    private var remainingIntervalDuration: NSTimeInterval = 0.0
    private var currentIntervalIndex = 0

    // MARK: - Timer Methods
    private func startTimer() { }
    private func interruptTimer() { }
    private func completeTimer() { }
    private func resetTimer() { }
    func timerFired() { }
    
    // MARK: - Update Display
    private func updateDisplay() { }
    private func updateTimerButton() { }
    private func updateBackground() { }
    
    // MARK: - Navigation
    @IBAction func timerButtonPressed(sender: AnyObject) { }
    
    // MARK: - View Controller Lifecycle
    override func viewDidLoad() { super.viewDidLoad() }
    
    // MARK: - Notifications
    func applicationWillResignActive() { }
    func applicationWillEnterForeground() { }
    func applicationWillTerminate() { }
    func notificationActionNextInterval() { }
}