Book Image

Mastering iOS 12 Programming - Third Edition

By : Donny Wals
Book Image

Mastering iOS 12 Programming - Third Edition

By: Donny Wals

Overview of this book

The iOS development environment has significantly matured, and with Apple users spending more money in the App Store, there are plenty of development opportunities for professional iOS developers. However, the journey to mastering iOS development and the new features of iOS 12 is not straightforward. This book will help you make that transition smoothly and easily. With the help of Swift 4.2, you’ll not only learn how to program for iOS 12, but also how to write efficient, readable, and maintainable Swift code that maintains industry best practices. Mastering iOS 12 Programming will help you build real-world applications and reflect the real-world development flow. You will also find a mix of thorough background information and practical examples, teaching you how to start implementing your newly gained knowledge. By the end of this book, you will have got to grips with building iOS applications that harness advanced techniques and make best use of the latest and greatest features available in iOS 12.
Table of Contents (35 chapters)
Title Page
Copyright and Credits
Packt Upsell


  1. What happens if you don't provide a reason for wanting to access a user's contacts?

a) Nothingb) An empty alert is shownc) The app crashes

  1. What is a reuse-identifier on a table-view cell used for? 

a) It helps you identify cells by their nameb) It is useful for accessibilityc) It is used by the table view to optimize performance

  1. Where does a table view obtain information about the cells it displays from?

a) CellProvider b) UITableViewDataSource c) UITableViewDelegate

  1. How does a table view make sure to keep its memory footprint as small as possible?

a) It loads all cells at once b) It reuses cells that were displayed before c) It limits the number of cells it can handle

  1. What is a placeholder cell called in Interface Builder?

a) Prototype cell b) Placeholder cell c) Designer cell

  1. What is a connection between an item Interface Builder and a variable in code called?

a) @IBConnection  b) @IBInlet  c) @IBOutlet

  1. Where is the best place to reset a table-view cell?

a) In awakeFromNib() b) In reset() c) In prepareForReuse()