Infinum iOS Talks #2 - Xamarin by Ivan Đikić
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The document discusses three common approaches to mobile app development: native, hybrid, and Xamarin. It focuses on explaining the Xamarin approach. Key points: - Xamarin allows writing apps in C# that can target iOS and Android from a single codebase. - It works by compiling to a common language runtime and using platform invocation to call native platform APIs. - Developers get access to the full native platform functionality while sharing most of the app's code across platforms.
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Infinum iOS Talks #2 - Xamarin by Ivan Đikić
- 1. IVAN ĐIKIĆ
- 2. INTRO
- 3. COMMON APPROACHES TO MOBILE APP DEVELOPMENT • NATIVE APPROACH • HYBRID APPROACH • XAMARIN APPROACH
- 5. “SILO”
- 7. “BLACK BOX”
- 11. WHAT YOU GET WITH XAMARIN? • single language C#(F#) • class library • runtime that works across platforms • complete binding for underlying platform • ability to directly invoke ObjC, Java, C, C++ • huge BCL • powerfull IDE
- 12. 05HOW DOES XAMARIN WORK
- 13. XAMARIN UNDER THE HOOD • built on top of Mono, open source .NET framework • can be run on nearly every imaginable platform • Unix • Linux • FreeBSD • OSX
- 14. HOW IT WORKS • trough usage of P/Invoke Service MANAGED SOURCE CODE COMPILER COMMON LANGUAGE RUNTIME STANDARD MARSHALLING SERVICE PLATFORM INVOKE MANAGEDUNMANAGED DLL FUNCTION METADATA IL CODE ASSEMBLY
- 15. HOW IT WORKS - P/INVOKE 1. read [*h] header files to map [C/Obj-C] API to [C#] → (marshalling) 2. compile [*.m/*.mm/*.c] files to object files and link them into static/ dynamic libraries. 3. embed libraries from #2. step into .Net project 4. generate [C#] wrappers to expose #2. to the [C#] world
- 18. POSSIBLE ISSUES • binding of third party libraries • Xamarin Store, lots of open sourced components • If missing, you need to BIND it yourself • memory management • lambdas + GC + marshalling • (object references across interop boundaries)
- 19. 07HOW TO START
- 20. GETTING STARTED • MAC: • Xamarin Studio [UI + CODE] • Xamarin Studio [Code] + Xcode [UI] • WINDOWS: • Visual Studio [UI + CODE] + MAC for building • Xamarin Studio [UI + CODE] + MAC for building * installer will download everything that you need (SDK, …)
- 21. HOW DOES IT FEEL :)?
- 22. Q&A