To get the most out of this book

We recommend that you read the first chapter to make sure that you are up to speed with the basic concepts of Xamarin in general. After that, you could pretty much pick any chapter you would like to learn more about. Each chapter is standalone but the chapters are ordered by complexity; the further you are into the book, the more complex the app will be.

The apps are adapted for real-world use but some parts are left out, such as proper error handling and analytics, since they are out of the scope of the book. You should, however, get a good grasp of the building blocks of how to create an app.

Having said that, it does help if you have been a C# and .NET developer for a while, since many of the concepts are not really app-specific but are good practice in general, such as Model-View-ViewModel and Inversion of Control.

But, most of all, it's a book you can use to kick-start your Xamarin.Forms development learning curve by focusing on what chapters interest you the most.

Software/Hardware covered in the book	OS Requirements
Visual Studio Community Edition. A computer capable of running Windows 10 or later for UWP and Android. A mac that is capable of running macOS Mojave 10.14 to use the iOS simulator	Windows 10 or later, macOS Sierra 10.12 or later
Xcode. A mac that is capable of running macOS Sierra 10.14	macOS Mojave 10.14

If you are using the digital version of this book, we advise you to type the code yourself or access the code via the GitHub repository (link available in the next section). Doing so will help you avoid any potential errors related to the copying and pasting of code.

Download the example code files

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the Support tab.
3. Click on Code Downloads.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Xamarin.Forms-4-Projects. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

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://static.packt-cdn.com/downloads/9781839210051_ColorImages.pdf.

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: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system."

A block of code is set as follows:

html, body, #map {
 height: 100%; 
 margin: 0;
 padding: 0
}

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

[default]
exten => s,1,Dial(Zap/1|30)
exten => s,2,Voicemail(u100)
exten => s,102,Voicemail(b100)
exten => i,1,Voicemail(s0)

Any command-line input or output is written as follows:

$ mkdir css
$ cd css

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: "Select System info from the Administration panel."

Warnings or important notes appear like this.

Tips and tricks appear like this.