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  • Book Overview & Buying Swift Essentials
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Swift Essentials

Swift Essentials

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

Swift Essentials

4.8 (4)
By: Alex Blewitt
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
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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
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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
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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
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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
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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

Using Auto Layout

Auto Layout has been part of Xcode for the last few releases, and it was added to support an evolution from the previous springs and struts approach that predated Mac OS X. First released on iOS in 6.0, it has evolved to the point where size-independent displays can now be created as the default.

Understanding constraints

In Xcode 5, interface builder enabled Auto Layout by default for the first time. When a label was dragged to the top or bottom of the parent view, a dotted blue line would indicate that the label was correctly spaced, and a constraint would be generated.

However, in many cases, the constraints weren't created correctly or had undesired effects. For example, positioning a button in the center at the top might not maintain the location depending on whether the constraint being added was absolute (200 px from the right) or relative (in the center of the screen). In both cases, the button might look like it was positioned correctly, only to fail when the...

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Programming languages
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Swift Essentials
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