Take an in-depth look at mobile development architecture patterns including MVC and MVVM. Explore what you get out of the box, and what you get with frameworks such as Bind, Mvvm Light, and MvvmCross. Code is all with C# and xamarin on android, ios, and windows phone

1. Data Bind Everything!
Mobile Development Strategies with MVVM
James Montemagno
Developer Evangelist, Xamarin Tweet:
@JamesMontemagno, @XamarinHQ #Xamarin
www.MotzCod.es, www.Xamarin.com

2. “MVVM is awesome and will
revolutionize your application
development process.”
-James Montemagno

3. Let’s talk architecture
(because that is fun)

4. Well First…. What is Xamarin?

5. Mobile Development Approaches

6. Single App
OR OR

7. Silo Approach

8. Write Once, Run Anywhere Approach
Lowest common denominator
App Generation

9. Write Once, Run Anywhere Approach
Lowest common denominator
App Generation

10. Xamarin’s Unique Approach

11. C# on 2.6 Billion Devices

15. 100% API Coverage

16. Anything you can do in Objective-C or Java can
be done in C# and Visual Studio with Xamarin!

17. Xamarin.iOS does full Ahead Of Time
(AOT) compilation to produce an
ARM binary for Apple’s App Store.
Native Performance
Xamarin.Android takes advantage
of Just In Time (JIT) compilation on
the Android device.

18. Code Sharing: Accelerate Development
Android
iOS
Mac
WP

19. For real, let’s talk architecture

20. Why do we use them?
•Organize & Maintain Code
•Abstract away all business logic
•Re-use a high percent of our code
•Make our views dumb!
•Our architect told us to

21. What is MVC?

22. Model-View-Controller
Model
View Controller
Updates
Sees Uses
Manipulates

23. What is MVVM?

24. Model-View-ViewModel
ModelView ViewModel
How to display
information
What to display
Flow of interaction
Business Logic
Data objects
Events
Data
Data

25. MVVM != Data Binding

26. MVVM Framework == Data Binding

27. Model-View-ViewModel
ModelView ViewModel
Magic Binding
Framework Here

28. Live Coding
Adventure 1

29. Microsoft World
• Built into:
Windows Phone
Windows Store
WPF
• Does not:
Navigation
IoC
Fun Stuff
• Provides:
Data Binding
Commands

30. What about….

31. Enter Frank Krueger & Bind!
• https://github.com/praeclarum/Bind
• Easy two-way data binding

32. Live Coding
Adventure 2

33. How about even more?

34. == AWESOME
How about even more?

35. MvvmCross
• Super MVVM framework for all
• Data Binding
• Commands
• Navigation
• IoC
• Plugins
• So Much More…

36. Live Coding
Adventure 3

37. Xamarin Evolve 2013
Sold
Out!
650
Conference
Attendees
8,400
Live stream
hours viewed
#1
Trending on Twitter
during keynote
Watch Sessions & Highlights: http://xamarin.com/evolve/2013

38. www.xamarin.com/evolve

39. • Sign up at xamarin.com/university
• Learn to build native iOS, Android, and Windows
apps with C#.
• Live online, interactive classes with live coding.
• Labs with full source code solutions.
• Access to Xamarin Certified Developer exam.
• Unlimited Annual Access: Enjoy unlimited, live
mobile development training from mobile experts,
on your schedule, and as often as you'd like.

40. Where Do I Start?
Xamarin.com

41. GET YOUR
C# SHIRT
TODAY!

42. Find Me:
@JamesMontemagno
www.MotzCod.es
GitHub.com/JamesMontemagno
Xamarin:
@XamarinHQ
www.Xamarin.com
MvvmCross
http://mvvmcross.wordpress.com
GitHub.com/MvvmCross
NuGet: MvvmCross
Latest App
My StepCounter for Android & iOS
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