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  • Book Overview & Buying Mastering Swift
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Mastering Swift

Mastering Swift

By : Jon Hoffman
5 (2)
Buy this Book
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Mastering Swift

Mastering Swift

5 (2)
By: Jon Hoffman
Buy this Book

Overview of this book

If you are a developer that learns best by looking at, and working with, code, then this book is for you. A basic understanding of Apple's tools is beneficial but not mandatory.
Table of Contents (17 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
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1
1. Taking the First Steps with Swift
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1. Taking the First Steps with Swift
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What is Swift?
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Playgrounds
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Swift language syntax
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Hello world
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Summary
2
2. Learning about Variables, Constants, Strings, and Operators
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2. Learning about Variables, Constants, Strings, and Operators
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Constants and variables
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Defining constants and variables
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Numeric types
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The Boolean type
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The string type
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Optional variables
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Enumerations
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Operators
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Summary
3
3. Using Collections and Cocoa Data Types
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3. Using Collections and Cocoa Data Types
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Swift collection types
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Mutability
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Arrays
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Dictionaries
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Tuples
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Using Cocoa data types
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Foundation data types
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Summary
4
4. Control Flow and Functions
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4. Control Flow and Functions
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What we have learned so far
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Control flow
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Functions
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Summary
5
5. Classes and Structures
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5. Classes and Structures
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What are classes and structures?
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Creating a class or structure
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Initializer
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Inheritance
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Overriding methods and properties
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Protocols
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Extensions
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Memory management
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Summary
6
6. Working with XML and JSON Data
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6. Working with XML and JSON Data
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XML and JSON
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Common files
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XML and the NSXMLParser class
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Using the NSXMLParserDelegate protocol
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Parsing XML documents
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XML and manually building XML documents
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JSON and NSJSONSerialization
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Summary
7
7. Custom Subscripting
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7. Custom Subscripting
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Introducing subscripts
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Subscripts with Swift arrays
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Read and write custom subscripts
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Read only custom subscripts
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Calculated subscripts
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Subscript values
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Subscripts with ranges
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External names for subscripts
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Multidimensional subscripts
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When not to use a custom subscript
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Summary
8
8. Using Optional Type and Optional Chaining
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8. Using Optional Type and Optional Chaining
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Introducing optionals
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The need for optional types in Swift
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Optional chaining
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Summary
9
9. Working with Generics
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9. Working with Generics
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Introduction to generics
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Generic functions
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Generic types
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Associated types
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Summary
10
10. Working with Closures
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10. Working with Closures
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Introducing closures
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Simple closures
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Shorthand syntax for closures
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Using closures with Swift's array algorithms
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Standalone closures and good style guidelines
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Changing functionality
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Select a closure based on results
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Strong reference cycles with closures
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Summary
11
11. Using Mix and Match
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11. Using Mix and Match
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What is mix and match?
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Using Swift and Objective-C together in the same project
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Summary
12
12. Concurrency and Parallelism in Swift
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12. Concurrency and Parallelism in Swift
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Concurrency and parallelism
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Summary
13
13. Swift Formatting and Style Guide
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13. Swift Formatting and Style Guide
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What is a programming style guide?
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Your style guide
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Summary
14
14. Network Development with Swift
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14. Network Development with Swift
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What is network development?
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An overview of the URL session classes
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REST web services
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Making an HTTP GET request
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Making an HTTP POST request
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Encoding a URL
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Checking network connection
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RSNetworking
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Summary
15
15. Adopting Design Patterns in Swift
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15. Adopting Design Patterns in Swift
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What are design patterns?
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Creational patterns
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Structural design patterns
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Behavioral design patterns
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Summary
16
Index
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Index

Chapter 8. Using Optional Type and Optional Chaining

When I first started using Swift, the concept that I had the most trouble with was optionals. Coming from an Objective-C, C, Java, and Python background, I was able to relate to most of Swift's features to how things worked in one of the other languages that I knew, but optionals were different. There really was nothing like optionals in the other languages that I used, so it took a lot of reading to fully understand them. While I briefly covered optionals in Chapter 2, Learning about Variables, Constants, Strings, and Operators, which gave enough of an overview to get started with, we need to cover a lot more information to really understand what optionals are, how to properly use them, and why they are so important in the Swift language.

In this chapter, we will cover the following topics:

  • An introduction to optional types
  • The need for optional types in Swift
  • Unwrapping and optional
  • Optional binding
  • Optional chaining
CONTINUE READING
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Tech Concepts
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Programming languages
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Mastering Swift
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