Building Multi-Platform Native Apps with MVVM and C# Greg Shackles Senior Software Engineer OLO @gshackles [email protected] github.com/gshackles 

nycmobiledev.net @NYCMobileDev 

Gone Mobile gonemobile.io @GoneMobileCast 

Google Apple RIM Microso! Symbian 52.0% Android 39.9% Apple 4.4% RIM 3.1% Microsoft Source: comScore US Market Share: June 2013 

Write Once, Run Anywhere 

Write Once, Run Anywhere BUSTED 

Xamarin: C# All The Things! * * plus some F# for good measure •100% Native •Full access to platform SDKs •BCL, Async, LINQ, etc •Improved API •Shared code across platforms •Garbage collection •Visual Studio / Xamarin Studio •Frequent Releases 

MVVM Click Me Hello World! 1. action 2. event handling 3. command 4. access data 5. notify change 6. get changed data 7. update UI View Binder View Model Model 

Binding: Properties 

Binding: Collections 

Binding: Actions 

Binding: Value Converters 

MvvmCross: Platforms 

•Shared behavior, not presentation •Bind all the platforms! •Powerful binding options •Convention over configuration •Pluggable architecture •PCL •Inversion of Control •Testable MvvmCross: Highlights 

•Source: github.com/slodge/MvvmCross •Stuart’s Blog: slodge.blogspot.com •N+1: mvvmcross.wordpress.com •Chat: jabbr.net/#/rooms/mvvmcross MvvmCross: Resources 

•Customize view presentation •Platform-specific •Still retain View Model logic Presenters •Tabs / Panorama •Split View / Master-Detail •Fragments •Modals •Hamburger menu 

Presenters 

Plugins • Accelerometer • Download Cache • Email • File • Json • Localization • Location • Messenger • Phone Call • Picture Chooser • SQLite • Visibility • Web Browser • Many More! 

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