Building Multi-Platform Native Apps with MVVM and C#

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

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gonemobile.io @GoneMobileCast

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Google Apple RIM Microsoft Symbian 52.5% Android 41.4% Apple 3.3% Microsoft 2.5% RIM Source: comScore US Market Share: April 2014

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Write Once, Run Anywhere

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Write Once, Run Anywhere BUSTED

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Xamarin: C# All The Things! * * and F# too!

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Xamarin: C# All The Things! * * and F# too! •100% Native

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Xamarin: C# All The Things! * * and F# too! •100% Native •Full access to platform SDKs

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Xamarin: C# All The Things! * * and F# too! •100% Native •Full access to platform SDKs •BCL, Async, LINQ, etc

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Xamarin: C# All The Things! * * and F# too! •100% Native •Full access to platform SDKs •BCL, Async, LINQ, etc •Improved API

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Xamarin: C# All The Things! * * and F# too! •100% Native •Full access to platform SDKs •BCL, Async, LINQ, etc •Improved API •Shared code across platforms

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Xamarin: C# All The Things! * * and F# too! •100% Native •Full access to platform SDKs •BCL, Async, LINQ, etc •Improved API •Shared code across platforms •Garbage collection

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Xamarin: C# All The Things! * * and F# too! •100% Native •Full access to platform SDKs •BCL, Async, LINQ, etc •Improved API •Shared code across platforms •Garbage collection •Visual Studio / Xamarin Studio

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MVVM

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MVVM View

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MVVM View Model

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MVVM View View Model Model

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MVVM View Binder View Model Model

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MVVM Click Me View Binder View Model Model

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MVVM Click Me 1. action View Binder View Model Model

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MVVM Click Me 1. action 2. event handling View Binder View Model Model

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MVVM Click Me 1. action 2. event handling 3. command View Binder View Model Model

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MVVM Click Me 1. action 2. event handling 3. command 4. access data View Binder View Model Model

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MVVM Click Me 1. action 2. event handling 3. command 4. access data 5. notify change View Binder View Model Model

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MVVM Click Me 1. action 2. event handling 3. command 4. access data 5. notify change 6. get changed data View Binder View Model Model

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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

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MvvmCross

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MvvmCross

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MvvmCross: Highlights

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• Shared behavior, not presentation MvvmCross: Highlights

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• Shared behavior, not presentation • Bind all the platforms! MvvmCross: Highlights

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• Shared behavior, not presentation • Bind all the platforms! • Powerful binding options MvvmCross: Highlights

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• Shared behavior, not presentation • Bind all the platforms! • Powerful binding options • Convention over conﬁguration MvvmCross: Highlights

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

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

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

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

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MvvmCross: Resources

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•Source: github.com/slodge/MvvmCross MvvmCross: Resources

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•Source: github.com/slodge/MvvmCross •Stuart’s Blog: slodge.blogspot.com MvvmCross: Resources

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

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

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Presenters

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• Customize view presentation Presenters

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• Customize view presentation • Platform-speciﬁc Presenters

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• Customize view presentation • Platform-speciﬁc • Still retain View Model logic Presenters

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• Customize view presentation • Platform-speciﬁc • Still retain View Model logic Presenters •Tabs / Panorama

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

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

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

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

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Presenters

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Presenters

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Presenters

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Presenters

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Plugins

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

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Xamarin.Forms Shared C# App Logic Shared C# User Interface Code

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Pages Content MasterDetail Navigation Tabbed Carousel

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Pages Layouts Content MasterDetail Navigation Tabbed Carousel Stack Absolute Relative Grid Content Scroll Frame

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Controls

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Controls • ActivityIndicator • BoxView • Button • DatePicker • Editor • EntryImage • Label • ListView • Map • OpenGLView • PickerProgressBar • SearchBar • SliderStepper • TableView • TimePicker • WebView • EntryCell • ImageCell • SwitchCell • TextCell • ViewCell

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