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  • Book Overview & Buying Swift Essentials
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Swift Essentials

Swift Essentials

By : Alex Blewitt, Bandlem Limited
4.8 (4)
Buy this Book
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Swift Essentials

Swift Essentials

4.8 (4)
By: Alex Blewitt, Bandlem Limited
Buy this Book

Overview of this book

Whether you are a seasoned Objective-C developer or new to the Xcode platform, Swift Essentials will provide you with all you need to know to get started with the language. Prior experience with iOS development is not necessary, but will be helpful to get the most out of the book.
Table of Contents (10 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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Trademarks
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Conventions
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Reader feedback
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Customer support
Free Chapter
1
1. Exploring Swift
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1. Exploring Swift
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Getting started with Swift
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Conditional logic
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Iteration
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Functions
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Command-line Swift
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Summary
2
2. Playing with Swift
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2. Playing with Swift
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Getting started with playgrounds
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Displaying objects with QuickLook
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Advanced techniques
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Playgrounds and documentation
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Limitations of playgrounds
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Summary
3
3. Creating an iOS Swift App
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3. Creating an iOS Swift App
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Understanding iOS applications
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Creating a single view iOS application
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Swift classes, protocols, and enums
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Creating a master-detail iOS application
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Summary
4
4. Storyboard Applications with Swift and iOS
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4. Storyboard Applications with Swift and iOS
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Storyboards, scenes, and segues
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Adding a navigation controller
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Swift and storyboards
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Using Auto Layout
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Summary
5
5. Creating Custom Views in Swift
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5. Creating Custom Views in Swift
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An overview of UIView
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Creating new views with interface builder
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Creating views by subclassing UIView
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Custom graphics with drawRect
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Custom graphics with layers
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Summary
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6. Parsing Networked Data
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6. Parsing Networked Data
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Loading data from URLs
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Parsing JSON
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Parsing XML
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Direct network connections
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Summary
7
7. Building a Repository Browser
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7. Building a Repository Browser
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An overview of the GitHub API
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The RepositoryBrowser project
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Creating the client
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Accessing repositories from view controllers
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Summary
8
A. Appendix
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A. Appendix
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Language
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Twitter users
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Blogs and tutorial sites
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Meetups
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Afterword
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Index
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Index

Displaying objects with QuickLook

The playground timeline can display objects as well as numbers and simple strings. It is possible to load and view images in a playground using classes such as UIImage (or NSImage on OS X). These are known as QuickLook supported objects, and by default include:

  • Strings (attributed and unattributed)
  • Views
  • Class and struct types (members are shown)
  • Colors

Tip

It is possible to build support for custom types in Swift, by implementing a debugQuickLookObject method that returns a graphical view of the data.

Showing colored labels

To show a colored label, a color needs to be obtained first. When building against iOS, this will be UIColor; but when building against OS X, it will be NSColor. The methods and types are largely equivalent between the two, but this chapter will focus on the iOS types.

A color can be acquired with an initializer or by using one of the predefined colors that are exposed in Swift using methods:

import UIKit // AppKit for OS X
let blue = UIColor...

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