Book Image

Swift 2 By Example

By : Giordano Scalzo
Book Image

Swift 2 By Example

By: Giordano Scalzo

Overview of this book

Swift is no longer the unripe language it was when launched by Apple at WWDC14, now it’s a powerful and ready-for-production programming language that has empowered most new released apps. Swift is a user-friendly language with a smooth learning curve; it is safe, robust, and really flexible. Swift 2 is more powerful than ever; it introduces new ways to solve old problems, more robust error handling, and a new programming paradigm that favours composition over inheritance. Swift 2 by Example is a fast-paced, practical guide to help you learn how to develop iOS apps using Swift. Through the development of seven different iOS apps and one server app, you’ll find out how to use either the right feature of the language or the right tool to solve a given problem. We begin by introducing you to the latest features of Swift 2, further kick-starting your app development journey by building a guessing game app, followed by a memory game. It doesn’t end there, with a few more apps in store for you: a to-do list, a beautiful weather app, two games: Flappy Swift and Cube Runner, and finally an ecommerce app to top everything off. By the end of the book, you’ll be able to build well-designed apps, effectively use AutoLayout, develop videogames, and build server apps.
Table of Contents (18 chapters)
Swift 2 By Example
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Free Chapter
1
Welcome to the World of Swift
2
Building a Guess the Number App
Index

The game screen


Before implementing the game, let's proceed to build the layout of the cards on the table.

The structure

Now let's implement a new class called MemoryViewController, which extends the UIVewController class. This will be used to manage the actual view where the Memory Game will be played. The first thing we do is add the class life cycle functions:

class MemoryViewController: UIViewController {
    private let difficulty: Difficulty

    init(difficulty: Difficulty) {
        self.difficulty = difficulty
        super.init(nibName: nil, bundle: nil)
    }

    required init(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    deinit{
        print("deinit")
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        setup()
    }
}
// MARK: Setup
private extension MemoryViewController {
    func setup() {
        view.backgroundColor = .greenSea()
    }
}

Besides the initializer that accepts the chosen difficulty, although...