Xamarin.Forms (Northern VA Mobile C# Developers Group 8/13/14)
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Xamarin 3 introduces enhancements to the Xamarin platform including a new iOS designer, IDE updates, and Xamarin.Forms. Xamarin.Forms is a set of APIs that allow developers to write cross-platform mobile apps using shared C# code that renders natively on iOS, Android, and Windows Phone. It includes UI elements like pages, layouts and views. The new iOS designer integrated in Xamarin Studio and Visual Studio supports iOS 6/7 storyboards and auto-layout. Xamarin Studio also received updates like NuGet package manager and F# support.
Xamarin.Forms (Northern VA Mobile C# Developers Group 8/13/14)
- 1. XAMARIN 3 AND XAMARIN.FORMS Ed Snider Aug 13 2014 NoVA Mobile C# Dev Group
- 2. CONTENT Introduction What is Xamarin? Quick Review: Native Multi-Platform Mobile Architecture What’s new with Xamarin 3 Xamarin iOS Designer Xamarin Studio IDE Updates Xamarin.Forms Wrap up
- 3. INTRODUCTION Ed Snider - @edsnider Developer at InfernoRed Technology Co-Organizer of NoVA Mobile C# Developers’ Group www.infernored.com @infernoredtech www.novamobiledev.org @novamobiledev
- 5. XAMARIN… Xamarin is built on Mono Allows native app compilation on Android and iOS using C# 100% API Coverage – All iOS and Android APIs are exposed as C# class libraries Up-to-date with API releases from Apple and Google
- 9. HOW XAMARIN WORKS C# + .NET Runtime Native UI Native Performance
- 10. XAMARIN DEVELOPMENT TOOLS Xamarin for Visual Studio Xamarin Studio for Windows and Mac
- 11. QUICK REVIEW: NATIVE MULTI- PLATFORM MOBILE ARCHITECTURE
- 12. THE PROBLEM WITH TRADITIONAL NATIVE MOBILE APP DEV… Native mobile apps are great but here’s the problem: Several Platforms: Windows, iOS, Android Several Languages: C#, Objective-C, Java Maintenance nightmares Customers and end-users suffer
- 13. THE BENEFITS OF MULTI- PLATFORM NATIVE MOBILE APP DEV WITH C# Develop for all platforms with a single language – C# - using Xamarin Harness the power of the .NET framework Single solution with shared code Unified and consistent maintenance/testing Feature parity across platforms = happy end users
- 14. WHAT’S NEW WITH XAMARIN 3?
- 15. BRAND NEW IOS DESIGNER Fully integrated in Xamarin Studio and Visual Studio iOS 6 / 7 Storyboard support Intuitive event handling Support for auto-layout Custom controls live preview
- 17. XAMARIN STUDIO IDE ENHANCEMENTS NuGet Package Manager Shared Projects .NET BCL Documentation F# Support
- 18. XAMARIN.FORMS Set of APIs that abstract platform specific UI elements and behaviors Write UI code once and it is rendered natively across iOS, Android and Window Phone Use C# and/or XAML Ships as NuGet packages Views can now live in the PCL Mix and match with platform APIs Shared UI Code
- 19. XAMARIN.FORMS CONTROLS Pages (e.g., Master-detail, Tabs, Carousel) Layouts (e.g., Stack, Grid) Views (e.g., Button, Label) Cells (e.g., templates for table/list items)
- 20. XAMARIN.FORMS PAGES Xamarin.Forms.Page Represents UI screens Page = Activity on Android Page = View Controller on iOS Page = Page on Windows Phone Xamarin.Forms Pages Documentation
- 21. XAMARIN.FORMS LAYOUTS Represents UI containers Logically structures UI elements Xamarin.Forms Layouts Documentation
- 22. XAMARIN.FORMS VIEWS Represents UI controls Implemented natively and platform specific Entry = EditText on Android Entry = UITextField on iOS Entry = Textbox on Windows Phone Xamarin.Forms Views Documentation
- 23. SOME OTHER COOL THINGS ABOUT XAMARIN… Component Store: http://components.xamarin.com/ .NET Mobility Scanner: http://scan.xamarin.com/ F#: http://developer.xamarin.com/guides/cross- platform/fsharp/fsharp_support_overview/ Xamarin Test Cloud: http://xamarin.com/test-cloud
- 24. RESOURCES Xamarin.Forms Intro http://developer.xamarin.com/guides/cross-platform/xamarin- forms/introduction-to-xamarin-forms/ Code from my demo https://github.com/edsnider/CoffeeFinder-XamarinFormsDemo Image credit: https://octodex.github.com/
Editor's Notes
- #7: If you are a windows developer you will be used to these name spaces. These are the core .NET base libraries that we know and love. If you mix in windows phone and windows store development you get new namespaces Windows. And Microsoft. With platform specific APIs
- #8: Xamarin gives you the best of both worlds with full support for the .NET Framework (your System. Libraries) Then they create C# bindings for every API in iOS and Android As you can see here there are a few, CoreGraphics, CoreMotion, etc, These are your platform specific bits to take advantage of everything in iOS
- #9: Then they do the same thing for Android so here you get the Android specifics Renderscript, NFC to do cool phone tapping of data transfer And text to speech apis to make your app shine
- #10: On iOS Xamarin Compiles the C# down to IL (intermediate language) Then Xamarin create LLVM bit code Then the LLVM bit code runs through the same LLVM Compiler and Optimizer that apple users for objective-c code Creating the final native arm binary. On Android they use an advanced compiler and linking to IL and then JIT to create native instructions at runtime for optimal performance which often can be faster than the dalvik runtime.
- #11: Not only are you able to build apps for Android and iOS with C# but you can also do it all within VS to bring all your favorite tools, libraries, extensions to your mobile development Xamarin offers a very rich integration experience with Visual Studio Business license or higher Develop both iOS and Android in VS (part of File > New experience with templates, etc.) IntelliSense allows you to explore the full APIs in a consistent and familiar way Developing iOS within Visual Studio requires a networked Mac build/deployment host Xamarin also offers their own IDE, Xamarin Studio Available on Mac and Windows Available with any license Rich design surfaces for building native Uis Android UI builder with drag and drop UI tool Integration with Xcode Interface builder to build iOS Uis Built in support for Git and Subversion