Code in Action

Visit the following link to check out videos of the code being run:

https://www.youtube.com/playlist?list=PLeLcvrwLe185EJSoURfHhSHfbPFkiZl6m

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://packt.link/gbp/9781836204893.

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “So, this is a very simple function, named serviceCharge().”

A block of code is set as follows:

class ClassName {
   property1
   property2
   property3
   method1() {
      code
   }
   method2() {
      code
   }
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

let cat = Animal()
cat.name = "Cat"
cat.sound = "Mew"
cat.numberOfLegs = 4
cat.breathesOxygen = true
print(cat.name)

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: “Launch Xcode and click Create a new Xcode project:”

Important notes

appear like this.

Tips

appear like this.