Browse Library
Sign In Start Free Trial
Close icon Search icon
Account
Browse Library Advanced Search Sign In Start Free Trial

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Learning Swift
  • Table Of Contents Toc
  • Feedback & Rating feedback
Learning Swift

Learning Swift

By : Andrew J Wagner
4.8 (5)
Buy this Book
close
close
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)
close
close
close
Preface
Icon
Preface
Icon
What this book covers
Icon
What you need for this book
Icon
Who this book is for
Icon
Conventions
Icon
Reader feedback
Icon
Customer support
Free Chapter
1
1. Introducing Swift
Icon
1. Introducing Swift
Icon
Defining our goals for this book
Icon
Setting up the development environment
Icon
Running our first Swift code
Icon
Understanding playgrounds
Icon
Learning with this book
Icon
Summary
2
2. Building Blocks – Variables, Collections, and Flow Control
Icon
2. Building Blocks – Variables, Collections, and Flow Control
Icon
Core Swift types
Icon
Swift's type system
Icon
Printing on the console
Icon
Control flow
Icon
Functions
Icon
Bringing it all together
Icon
Summary
3
3. One Piece at a Time – Types, Scopes, and Projects
Icon
3. One Piece at a Time – Types, Scopes, and Projects
Icon
Structs
Icon
Classes
Icon
Enumerations
Icon
Projects
Icon
Extensions
Icon
Scope
Icon
Access control
Icon
Summary
4
4. To Be or Not to Be – Optionals
Icon
4. To Be or Not to Be – Optionals
Icon
Introducing optionals
Icon
Unwrapping an optional
Icon
Optional chaining
Icon
Implicitly unwrapped optionals
Icon
Debugging optionals
Icon
The underlying implementation
Icon
Summary
5
5. A Modern Paradigm – Closures and Functional Programming
Icon
5. A Modern Paradigm – Closures and Functional Programming
Icon
Functional programming philosophy
Icon
Closures
Icon
Building blocks of functional programming in Swift
Icon
Lazy evaluation
Icon
Curried functions
Icon
Summary
6
6. Make Swift Work for You – Protocols and Generics
chevron up
Icon
6. Make Swift Work for You – Protocols and Generics
Icon
Protocols
Icon
Defining a generic
Icon
Extending the existing generics
Icon
Putting protocols and generics to use
Icon
Summary
7
7. Everything is Connected – Memory Management
Icon
7. Everything is Connected – Memory Management
Icon
How data is stored in a computer
Icon
Value types versus reference types
Icon
Automatic reference counting
Icon
Strong reference cycles
Icon
Lost objects
Icon
Summary
8
8. Writing Code the Swift Way – Design Patterns and Techniques
Icon
8. Writing Code the Swift Way – Design Patterns and Techniques
Icon
What is a design pattern?
Icon
Behavioral patterns
Icon
Structural patterns
Icon
Creational patterns
Icon
Using associated values effectively
Icon
Extending system types to reduce code
Icon
Lazy properties
Icon
Summary
9
9. Harnessing the Past – Understanding and Translating Objective-C
Icon
9. Harnessing the Past – Understanding and Translating Objective-C
Icon
Swift's relationship with Objective-C
Icon
The history of Objective-C
Icon
Constants and variables
Icon
Containers
Icon
Control flow
Icon
Functions
Icon
Types
Icon
Projects
Icon
Calling Objective-C code from Swift
Icon
Using functions
Icon
Summary
10
10. A Whole New World – Developing an App
Icon
10. A Whole New World – Developing an App
Icon
Conceptualizing the app
Icon
Setting up the app project
Icon
Configuring the user interface
Icon
Running the app
Icon
Allowing picture taking
Icon
Temporarily saving a photo
Icon
Populating our photo grid
Icon
Refactoring to respect Model-View-Controller
Icon
Permanently saving a photo
Icon
Summary
11
11. What's Next? Resources, Advice, and Next Steps
Icon
11. What's Next? Resources, Advice, and Next Steps
Icon
Apple's documentation
Icon
Forums and blogs
Icon
Prominent figures
Icon
Podcasts
Icon
Summary
12
Index
Icon
Index

Chapter 6. Make Swift Work for You – Protocols and Generics

As you learned in Chapter 2, Building Blocks – Variables, Collections, and Flow Control, Swift is a strongly typed language, which means that every piece of data must have a type. Not only can we take advantage of this to reduce clutter in our code, we can also leverage it to let the compiler catch bugs for us. The earlier we catch a bug, the better. Besides not writing them in the first place, the earliest place we can catch a bug is when the compiler reports an error.

The two big tools that Swift provides to achieve this are called protocols and generics. Both of them use the type system to make our intentions clearer to the compiler, so that it can catch more problems for us.

In this chapter, we will cover:

  • Protocols
  • Generics
  • How to extend the existing generics
  • How to put protocols and generics to use

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech
Start a 7-day FREE trial
End of Section 1
Next Section

Create a Note

Modal Close icon
You need to login to use this feature.
notes
bookmark search playlist font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected
Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Delete Note

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Confirmation

Modal Close icon
claim successful
Order Page Read Now

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY