Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: " Now it time to develop the viewDidLoad method."

A block of code is set as follows:

class Person{ 
   var name:String
   var age:Int
   init(name: String, age:Int) {
        self.name = name
       self.age = age
   }
}

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

class Person{ 
   var name:String
   var age:Int
 var address:String
   init(name: String, age:Int) {
        self.name = name
       self.age = age
   }
}

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Clicking the Next button moves you to the next screen."