SamStone92

    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        let container = transitionContext.containerView
        
        guard let fromView = transitionContext.view(forKey: UITransitionContextViewKey.from) else { return }
        guard let toView = transitionContext.view(forKey: UITransitionContextViewKey.to) else { return }
        
        self.isPresenting ? container.addSubview(toView) : container.insertSubview(toView, belowSubview: fromView)
        
        let detailView = isPresenting ? toView : fromView
     

SamStone92

class CustomAnimator : NSObject, UIViewControllerAnimatedTransitioning {
    var duration : TimeInterval
    var isPresenting : Bool
    var originFrame : CGRect
    var image : UIImage
    
    init(duration : TimeInterval, isPresenting : Bool, originFrame : CGRect, image : UIImage) {
        self.duration = duration
        self.isPresenting = isPresenting
        self.originFrame = originFrame

SamStone92

let springboard = Springboard()
let weatherApp = WeatherApp()
let clockApp = ClockApp()

springboard.setCommand(openCommand: WeatherAppOpenCommand(weatherApp: weatherApp), closeCommand: WeatherAppCloseCommand(weatherApp: weatherApp))
springboard.openApp(atIndex: 0)
springboard.closeApp(atIndex: 0)

springboard.setCommand(openCommand: ClockAppOpenCommand(clockApp: clockApp), closeCommand: ClockAppCloseCommand(clockApp: clockApp))
springboard.openApp(atIndex: 1)

SamStone92

class Springboard {
    
    private var openCommands = [Command]()
    private var closeCommands = [Command]()
    
    func setCommand(openCommand : Command, closeCommand : Command) {
        self.openCommands.append(openCommand)
        self.closeCommands.append(closeCommand)
    }

SamStone92

class ClockAppCloseCommand : Command {
    
    let clockApp  : ClockApp
    
    init(clockApp : ClockApp) {
        self.clockApp = clockApp
    }
    
    func execute() {
        self.clockApp.removeClock()

SamStone92

class WeatherAppCloseCommand : Command {
    
    let weatherApp  : WeatherApp
    
    init(weatherApp : WeatherApp) {
        self.weatherApp = weatherApp
    }
    
    func execute() {
        self.weatherApp.deleteWeatherData()

SamStone92

class WeatherAppOpenCommand : Command {
    
    let weatherApp  : WeatherApp
    
    init(weatherApp : WeatherApp) {
        self.weatherApp = weatherApp
    }
    
    func execute() {
        self.weatherApp.getWeatherData()

SamStone92

class ClockApp {
    
    func showClock() {
        print("Showing clock")
    }
    
    func removeClock(){
        print("Removing clock")
    }
    

SamStone92

protocol Command {
    
    func execute()
        
}

SamStone92

var macbookRegular: MacBook = MacBookRegular()
print("Cost : £\(macbookRegular.cost), Description: \(macbookRegular.description)")
macbookRegular = ProcessorUpgrade(macbook: macbookRegular)
print("Cost : £\(macbookRegular.cost), Description: \(macbookRegular.description)")
macbookRegular = SSDUpgrade(macbook: macbookRegular)
print("Cost : £\(macbookRegular.cost), Description: \(macbookRegular.description)")
macbookRegular = TouchBarUpgrade(macbook: macbookRegular)
print("Cost : £\(macbookRegular.cost), Description: \(macbookRegular.description)\n")