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  • Book Overview & Buying Learning Swift
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Learning Swift

Learning Swift

By : Andrew J Wagner
4.8 (5)
Buy this Book
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Learning Swift

Learning Swift

4.8 (5)
By: Andrew J Wagner
Buy this Book

Overview of this book

If you are looking to build iOS or OS X apps using the most modern technology, this book is ideal for you. You will find this book especially useful if you are new to programming or if you have yet to develop for iOS or OS X.
Table of Contents (13 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
Free Chapter
1
1. Introducing Swift
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1. Introducing Swift
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Defining our goals for this book
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Setting up the development environment
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Running our first Swift code
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Understanding playgrounds
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Learning with this book
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Summary
2
2. Building Blocks – Variables, Collections, and Flow Control
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2. Building Blocks – Variables, Collections, and Flow Control
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Core Swift types
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Swift's type system
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Printing on the console
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Control flow
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Functions
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Bringing it all together
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Summary
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3. One Piece at a Time – Types, Scopes, and Projects
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3. One Piece at a Time – Types, Scopes, and Projects
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Structs
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Classes
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Enumerations
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Projects
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Extensions
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Scope
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Access control
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Summary
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4. To Be or Not to Be – Optionals
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4. To Be or Not to Be – Optionals
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Introducing optionals
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Unwrapping an optional
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Optional chaining
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Implicitly unwrapped optionals
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Debugging optionals
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The underlying implementation
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Summary
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5. A Modern Paradigm – Closures and Functional Programming
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5. A Modern Paradigm – Closures and Functional Programming
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Functional programming philosophy
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Closures
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Building blocks of functional programming in Swift
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Lazy evaluation
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Curried functions
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Summary
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6. Make Swift Work for You – Protocols and Generics
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6. Make Swift Work for You – Protocols and Generics
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Protocols
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Defining a generic
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Extending the existing generics
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Putting protocols and generics to use
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Summary
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7. Everything is Connected – Memory Management
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7. Everything is Connected – Memory Management
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How data is stored in a computer
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Value types versus reference types
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Automatic reference counting
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Strong reference cycles
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Lost objects
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Summary
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8. Writing Code the Swift Way – Design Patterns and Techniques
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8. Writing Code the Swift Way – Design Patterns and Techniques
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What is a design pattern?
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Behavioral patterns
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Structural patterns
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Creational patterns
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Using associated values effectively
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Extending system types to reduce code
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Lazy properties
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Summary
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9. Harnessing the Past – Understanding and Translating Objective-C
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9. Harnessing the Past – Understanding and Translating Objective-C
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Swift's relationship with Objective-C
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The history of Objective-C
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Constants and variables
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Containers
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Control flow
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Functions
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Types
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Projects
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Calling Objective-C code from Swift
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Using functions
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Summary
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10. A Whole New World – Developing an App
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10. A Whole New World – Developing an App
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Conceptualizing the app
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Setting up the app project
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Configuring the user interface
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Running the app
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Allowing picture taking
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Temporarily saving a photo
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Populating our photo grid
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Refactoring to respect Model-View-Controller
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Permanently saving a photo
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Summary
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11. What's Next? Resources, Advice, and Next Steps
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11. What's Next? Resources, Advice, and Next Steps
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Apple's documentation
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Forums and blogs
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Prominent figures
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Podcasts
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Summary
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Index
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Index

Projects

If we want to move away from developing with a single file, we need to move away from playgrounds and create our first project. In order to not complicate the project too much, we will create a command-line tool project. This is a program that does not have a graphical interface. As an exercise, we will redevelop our example program from Chapter 2, Building Blocks – Variables, Collections, and Flow Control, which manages invites to a party. We will develop an app with a graphical interface in Chapter 10, A Whole New World – Developing an App.

Setting up a command-line Xcode project

To create a new command-line tool project, open Xcode and from the menu bar along the top, navigate to File | New | Project. A window will appear that allows you to select a template for the project. Choose Command Line Tool from the OS X | Application menu, as shown in the following figure:

Setting up a command-line Xcode project

From there, click on Next and then give the project a name such as Learning Swift Command Line. Any...

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