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Xamarin 4.x Cross-Platform Application Development

You're reading from   Xamarin 4.x Cross-Platform Application Development Develop powerful cross-platform applications with Xamarin

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Product type Paperback
Published in Dec 2016
Publisher
ISBN-13 9781786465412
Length 292 pages
Edition 3rd Edition
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Author (1):
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Jonathan Peppers Jonathan Peppers
Author Profile Icon Jonathan Peppers
Jonathan Peppers
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Table of Contents (13) Chapters Close

Preface 1. Xamarin Setup FREE CHAPTER 2. Hello, Platforms! 3. Code Sharing Between iOS and Android 4. XamSnap - A Cross-Platform App 5. XamSnap for iOS 6. XamSnap for Android 7. Deploying and Testing on Devices 8. Contacts, Camera, and Location 9. Web Services with Push Notifications 10. Third-Party Libraries 11. Xamarin.Forms 12. App Store Submission

Understanding AOT compilation


The runtime behind Mono and .NET on Windows is based on a just-in-time (JIT) compiler. C# and other .NET languages are compiled into Microsoft intermediate language (MSIL). At runtime, MSIL is compiled into a native code (just in time) to run on whatever type of architecture is running your application. Xamarin.Android follows this exact pattern. However, due to Apple's restrictions on dynamically generated code, a just-in-time (JIT) compiler is not allowed on iOS.

To work around this restriction, Xamarin has developed a new option called ahead-of-time (AOT) compilation, in which your C# code is compiled into native, platform-specific machine code. In addition to making .NET possible on iOS, AOT has other benefits, such as a shorter startup time and potentially better performance.

AOT also has some limitations that are generally related to C# generics. To compile an assembly ahead of time, the compiler will need to run some static analysis against your code to...

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