C# On The iPhone with MonoTouch at DDD8
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The document outlines MonoTouch, an open-source implementation of Microsoft's .NET framework for developing iOS applications in C#. It covers key features such as strong typing, automatic garbage collection, debugging support, and integration with existing Objective-C frameworks. The document also emphasizes the importance of getting started with the necessary tools and registration with Apple's developer program for deployment.
![Strong Types
• Objective-C
• Arrays are weakly typed:
• NSArray return values.
• MonoTouch has strong types
• UIView[] Subviews { get; }
• vs
• NSArray *subviews;
• Intellisense - explore the API...](https://image.slidesharecdn.com/monotouchkeynote-1-100130135150-phpapp01/85/C-On-The-iPhone-with-MonoTouch-at-DDD8-17-320.jpg)
C# On The iPhone with MonoTouch at DDD8
- 1. C# on the iPhone with MonoTouch Chris Hardy follow on Twitter - @chrisntr
- 3. Covering... • What is MonoTouch? • How does it work? • Why would you use it? • Demos
- 5. Objective C and Xcode
- 6. Learn to read Objective-C
- 7. Learn to read Objective-C • All Apple documentation is in Obj-C • Most examples are in Obj-C • It’s not too hard to understand • It might even be fun...
- 10. What is Mono? Open Source .Net Implementation of the Microsoft .Net Framework
- 11. Mono’s JIT Engine Memory Mono CIL
- 12. Apple No No... • Contractual Requirements • No interpreted code • No shared libraries • Kernel Limitations • iPhone OS 2.0+ disables JIT
- 13. Mono’s AOT Engine Native Code Mono AOT Mono Runtime CIL ARM
- 14. Monotouch Features • mtouch • MonoDevelop iPhone Add-In • CocoaTouch.NET • Full static AOT compiler • Support for all your existing code • Reflection • Generics • LINQ • Anonymous Methods • Lambda’s etc...
- 15. MonoTouch’s APIs
- 16. The Bindings • MonoTouch namespace • MonoTouch.Foo namespace • Maps to CocoaTouch’s Foo Framework • 1:1 Mapping of classes. • MonoTouch.UIKit.UILabel • CocoaTouch’s UIKit framework, UILabel class
- 17. Strong Types • Objective-C • Arrays are weakly typed: • NSArray return values. • MonoTouch has strong types • UIView[] Subviews { get; } • vs • NSArray *subviews; • Intellisense - explore the API...
- 18. Garbage Collection • Automatic: • Mono’s GC will collect objects on demand • Deterministic: • Use when you need control. • Every object in MonoTouch implements IDisposable using (var image = UIImage.FromFile(“foo.png”)){ surface.DrawImage(image, 20, 20); }
- 19. Linker
- 20. What about App Size? • 10 MB (compressed) limit on 3G/Edge downloads • .Net BCL and other libraries are huge • Mono Linker to the rescue!
- 22. Linker Options • No Link • Link SDK Only • Full Link
- 23. Pipeline • Interface Builder GUI Designer • Exact same tool used by Xcode • Support for existing Xcode interfaces • MonoDevelop IDE
- 24. Integration • Tight integration between MD and IB • IB produces XIBs with MD parses • Automatic class generation in MD • Generates partial classes for all types, outlets and actions defined in Interface Builder
- 25. Outlets • Instance Variables • Can be strong or loosely typed • MD will strong type
- 26. Actions • Objects emit broadcast messages to receivers • You can do this C# • MonoDevelop takes care of the details for you • Creates partial methods for you extend
- 27. MonoTouch Events • Supports Objective-C pattern: webView.Delegate = new MyWebViewDelegate(); • C# style events as well: webView.PageLoaded += delegate { HideSpinningWheel(); }
- 28. Debugging • Console.WriteLine(“Debugging inside of MonoTouch”); • printf(“I made it to this line!n”)
- 29. Well... • MonoTouch released around 15th September 2009 • MonoTouch 1.1 on 2nd October 2009 • MonoTouch 1.2 (Beta) released on 28th October 2009... With Debugging support • Currently on MonoTouch 1.4.5
- 30. Debugger • MonoTouch debugger leverages Mono’s new Soft-Debugger • Supports the Simulator • Supports the Device... • even over WiFi
- 31. Debugger Features • Breakpoints • Catchpoints • Inspection • Watches • Immediate / Expression Evaluator • Call Stack • Stepping
- 32. Caveats • Debug binaries on devices are very large • Cannot debug Main or FinishedLaunching on device • Consumes more memory runtime • Performance hit
- 33. Getting started • Get iPhone SDK from Apple • Get Mono from Novell • Get MonoTouch (evaluation version is free) • Get MonoDevelop • Register with Apple iPhone Developer Program and purchase MonoTouch for putting apps on device and AppStore.
- 35. iPad • But you want to develop for the iPad... • 24 Hours after the SDK was released... • MonoTouch support for iPad
- 36. Demo time...