Book Image

Xamarin Blueprints

By : Michael Williams
Book Image

Xamarin Blueprints

By: Michael Williams

Overview of this book

Do you want to create powerful, efficient, and independent apps from scratch that will leverage the Xamarin framework and code with C#? Well, look no further; you’ve come to the right place! This is a learn-as-you-build practical guide to building eight full-fledged applications using Xamarin.Forms, Xamarin Android, and Xamarin iOS. Each chapter includes a project, takes you through the process of building applications (such as a gallery Application, a text-to-speech service app, a GPS locator app, and a stock market app), and will show you how to deploy the application’s source code to a Google Cloud Source Repository. Other practical projects include a chat and a media-editing app, as well as other examples fit to adorn any developer’s utility belt. In the course of building applications, this book will teach you how to design and prototype professional-grade applications implementing performance and security considerations.
Table of Contents (14 chapters)
Xamarin Blueprints
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

Building the iOS ChatView


Add a new file called ChatViewController into the Views project of the Chat.iOS project and implement the following:

 
public class ChatViewController : UIViewController, ChatPresenter.IChatView {
         #region Private Properties
         private ChatPresenter _presenter;
         private UITextField _chatField;
         private UIScrollView _scrollView;
         private int _currentTop = 20;
         private nfloat _width;
         #endregion
  
         #region Constructors
         public ChatViewController(ChatPresenter presenter)
         {
             _presenter = presenter;
         }
         #endregion
 
} 

We have multiple Private properties, one for the presenter, a local UITextField. We need this UI object to be local, as we need to extract the Text value to send through the SignalRClient, and we also need the UIScrollView to be local so we can change the content...