Swift Essentials - Second Edition电子书

Swift Essentials Second Edition

Table of Contents

Swift Essentials Second Edition

Credits

About the Author

Acknowledgments

About the Reviewer

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Preface

What this book covers

What you need for this book

Who this book is for

Trademarks

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Exploring Swift

Open source Swift

Getting started with Swift

Numeric literals

Floating point literals

String literals

Variables and constants

Collection types

Optional types

Nil coalescing operator

Conditional logic

If statements

Switch statements

Iteration

Iterating over keys and values in a dictionary

Iteration with for loops

Break and continue

Functions

Named arguments

Optional arguments and default values

Guards

Multiple return values and arguments

Returning structured values

Error handling

Throwing errors

Catching errors

Cleaning up after errors

Command-line Swift

Interpreted Swift scripts

Compiled Swift scripts

Summary

2. Playing with Swift

Getting started with playgrounds

Creating a playground

Viewing the console output

Viewing the timeline

Displaying objects with Quick Look

Showing colored labels

Showing images

Advanced techniques

Capturing values explicitly

Running asynchronous code

Playgrounds and documentation

Learning with playgrounds

Understanding the playground format

Adding a page

Documenting code

Playground navigation documentation

Text formatting

Symbol documentation

Limitations of playgrounds

Summary

3. Creating an iOS Swift App

Understanding iOS applications

Creating a single-view iOS application

Removing the storyboard

Setting up the view controller

Swift classes, protocols, and enums

Classes in Swift

Subclasses and testing in Swift

Protocols in Swift

Enums in Swift

Raw values

Associated values

Creating a master-detail iOS application

The AppDelegate class

The MasterViewController class

The DetailViewController class

Summary

4. Storyboard Applications with Swift and iOS

Storyboards, scenes, and segues

Creating a storyboard project

Scenes and view controllers

Adding views to the scene

Segues

Adding a navigation controller

Naming scenes and views

Swift and storyboards

Custom view controllers

Connecting views to outlets in Swift

Calling actions from interface builder

Triggering a segue with code

Passing data with segues

Using Auto Layout

Understanding constraints

Adding constraints

Adding a constraint with drag and drop

Adding constraints to the Press Me scene

Adding missing constraints

Summary

5. Creating Custom Views in Swift

An overview of UIView

Creating new views with Interface Builder

Creating a table view controller

Showing data in the table

Defining a view in a xib file

Wiring a custom view class

Dealing with intrinsic size

Creating new views by subclassing UIView

Auto Layout and custom views

Constraints and the visual format language

Adding the custom view to the table

Custom graphics with drawRect

Drawing graphics in drawRect

Responding to orientation changes

Custom graphics with layers

Creating a ProgressView from layers

Adding the stop square

Adding a progress bar

Clipping the view

Testing views in Xcode

Responding to change

Summary

6. Parsing Networked Data

Loading data from URLs

Dealing with errors

Dealing with missing content

Nested if and switch statements

Networking and user interfaces

Running functions on the main thread

Parsing JSON

Handling errors

Parsing XML

Creating a parser delegate

Downloading the data

Parsing the data

Direct network connections

Opening a stream-based connection

Synchronous reading and writing

Writing data to NSOutputStream

Reading from an NSInputStream

Reading and writing hexadecimal and UTF8 data

Implementing the Git protocol

Listing git references remotely

Integrating the network call into the UI

Asynchronous reading and writing

Reading data asynchronously from an NSInputStream

Creating a stream delegate

Dealing with errors

Listing references asynchronously

Displaying asynchronous references in the UI

Writing data asynchronously to an NSOutputStream

Summary

7. Building a Repository Browser

An overview of the GitHub API

Root endpoint

User resource

Repositories resource

Repository browser project

URI templates

Background threading

Parsing JSON dictionaries

Parsing JSON arrays of dictionaries

Creating the client

Talking to the GitHub API

Returning repositories for a user

Accessing data through the AppDelegate

Accessing repositories from view controllers

Adding users

Implementing the detail view

Transitioning between the master and detail views

Loading the user's avatar

Displaying the user's avatar

Summary

8. Adding Watch Support

Watch applications

Adding a watch target

Adding the GitHubAPI to the watch target

Creating watch interfaces

Adding a list of users to the watch

Wiring up the interface

Adding an image

Responding to user interaction

Adding context and showing repositories

Adding a detail screen

Populating the detail screen

Best practice for watch applications

UI thread considerations

Stored data

Appropriate use of complications and glances

Summary

A. References to Swift-related Websites, Blogs, and Notable Twitter Users

Language

Twitter users

Blogs and tutorial sites

Meetups

Afterword

Index