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Swift Essentials

Swift Essentials

By : Alex Blewitt, Bandlem Limited
4.8 (4)
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Swift Essentials

Swift Essentials

4.8 (4)
By: Alex Blewitt, Bandlem Limited

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
Preface
What this book covers
What you need for this book
Who this book is for
Trademarks
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Exploring Swift
1. Exploring Swift
Getting started with Swift
Conditional logic
Iteration
Functions
Command-line Swift
Summary
2
2. Playing with Swift
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2. Playing with Swift
Getting started with playgrounds
Displaying objects with QuickLook
Advanced techniques
Playgrounds and documentation
Limitations of playgrounds
Summary
3
3. Creating an iOS Swift App
3. Creating an iOS Swift App
Understanding iOS applications
Creating a single view iOS application
Swift classes, protocols, and enums
Creating a master-detail iOS application
Summary
4
4. Storyboard Applications with Swift and iOS
4. Storyboard Applications with Swift and iOS
Storyboards, scenes, and segues
Adding a navigation controller
Swift and storyboards
Using Auto Layout
Summary
5
5. Creating Custom Views in Swift
5. Creating Custom Views in Swift
An overview of UIView
Creating new views with interface builder
Creating views by subclassing UIView
Custom graphics with drawRect
Custom graphics with layers
Summary
6
6. Parsing Networked Data
6. Parsing Networked Data
Loading data from URLs
Parsing JSON
Parsing XML
Direct network connections
Summary
7
7. Building a Repository Browser
7. Building a Repository Browser
An overview of the GitHub API
The RepositoryBrowser project
Creating the client
Accessing repositories from view controllers
Summary
8
A. Appendix
A. Appendix
Language
Twitter users
Blogs and tutorial sites
Meetups
Afterword
9
Index
Index

Limitations of playgrounds

Although playgrounds can be very powerful for interacting with code, there are some limitations that are worth being aware of. There is no debugging support in the playground. It is not possible to add a breakpoint and use the debugger and find out what the values are. Given that the UI allows tracking values—and that it's very easy to add new lines with just the value to be tracked—this is not much of a hardship. Other limitations of playgrounds include:

  • Only the simulator can be used for the execution of iOS-based playgrounds. This prevents the use of hardware-specific features that might only be present on a device.
  • The performance of playground scripts is mainly driven based on how many lines are executed and how much output is saved by the debugger. It should not be used to test the performance of performance-sensitive code.
  • Although the playground is well suited to present user interface components, it cannot be used for user input.
  • Anything...

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