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

Projects

Now that we have a pretty good understanding of Objective-C, let's discuss what Objective-C code looks like in a project. Unlike the Swift code, Objective-C is written in two different types of files. One of the types is called a header file and it ends in the extension h. The other type is called an implementation file and ends in the extension m.

Before we really discuss what the difference between the two is, we first have to discuss code exposure. In Swift, all the code that you write is accessible to all other code in your project. This is not true with Objective-C. In Objective-C, you must explicitly indicate that you want to have access to the code in another file.

Header files

Header files are the types of files that can be included by other files. This means that header files should only contain the interfaces of types. In fact, this is why the separation exists between class interfaces and implementations. Any file can import a header file, and this essentially inserts all...

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 7
Next Section
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

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