Portable Class Libraries

Pierce Boggan @piercebogganDeveloper Evangelist (Intern), Xamarin pierceboggan.com

Xamarin + Xamarin.FormsXamarin.Forms

Code Sharing + 100% Native ControlsTraditional Xamarin Approach

Shared UI Code

Xamarin.Forms

Shared UI Code

Quickly and easy build native user interfaces from a single, shared C# codebase

Xamarin.Forms elements map directly to native controls and behaviors

Mix-and-match Xamarin.Forms with platform-specific APIs

What’s in the box?

• 40+ Layouts, Pages, and Controls• Build UIs in C# or XAML• Data Binding• Navigation• Animation API• Dependency Service• Custom Renderers• Messaging Center• So much more!

Pages

Content MasterDetail Navigation Tabbed Carousel

Layouts

Stack Absolute Relative Grid ContentView ScrollView Frame

Controls

ActivityIndicator

BoxView Button DatePicker Editor

Entry Image Label ListView Map

OpenGLView Picker ProgressBar SearchBar Slider

Stepper TableView TimePicker WebView EntryCell

ImageCell SwitchCell TextCell ViewCell

Controls

DEMO

Model-View-ViewModel

ModelView ViewModel

How to display information

What to displayFlow of interaction

Business LogicData objects

Events

Data Dat

a

Model-View-ViewModel

ModelView ViewModel

Xamarin.Forms Data Binding

Events

Data

Data Binding (Step 1)

Data Binding (Step 2)

Data Binding (Step 3)

Commands

• Execute a method when an action is performed, such as button click

• Parameter passing to commands

• Helps to increase code-sharing even more

Commands (Step 1)

Commands (Step 2)

DEMO

iOS APIs | 100% Coverage

Android APIs | 100% Coverage

Anything you can do in Objective-C, Swift, or Java

can be done in C# with Xamarin.

Dependency Service

• Full access to platform-specific APIs

• Access platform-specific implementations cleanly with Xamarin.Forms DependencyService

Dependency Service

Dependency Service

Dependency Service

DEMO

Wait… there’s more?

• Animation API

• Messaging Center

• Custom Controls

• Gesture Recognizers

• Xamarin.Forms.Maps

REAL-WORLD?

Resources

• API Documentation (http://developer.xamarin.com/guides/cross-platform/xamarin-forms/)

• Samples (https://github.com/xamarin/xamarin-forms-samples)

• Hanselman.Forms (https://github.com/jamesmontemagno/Hanselman.Forms)

• Xamarin.Forms Labs (https://github.com/XForms/Xamarin-Forms-Labs)

• Session Code (http://bit.ly/xamarin-forms-intro)

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