I was interested in the idea of writing cross platform C# app. What I found is that putting the common functionality is a shared project, and then every GUI platform in its own project. In my example I used WPF for windows GUI and GTK# for linux. Works kinda nice.

https://github.com/sebnil/CrossPlatformCsharpExperiment

Github repo

Example project showing how to create a custom control (UIView) with XIB so that it's available in Xamarin iOS designer. Custom UIView does not render in storyboard, but can be selected from the toolbox window. If you make rendering in storyboard work, please make a pull request and I will merge it into this repo. The reason to this example project simply is that I was looking for an example like this but could not find something that was working out of the box.

Design custom view in xib using Visual Studio or Xcode (less buggy):

CustomView is visible in Toolbox:

CustomView can be droped into your storyboard:

Simulator run. View can also be resized/rotated during runtime:

Getting Started

Clone and run .sln in Visual Studio.

Prerequisites

Visual Studio (Tested on Visual Studio CE 2017)

Author

• Sebastian Nilsson - sebastiannilsson.com

License

This project is licensed under the MIT License - see the LICENSE.md file for details

Acknowledgments

• Various forum comments in this thread - Initial work - forums.xamarin.com
• https://developer.xamarin.com/recipes/ios/general/templates/using_the_ios_view_xib_template/
• https://developer.xamarin.com/guides/ios/user_interface/designer/ios_designable_controls_walkthrough/
• https://app.pluralsight.com/

Github repo (to download code)

My brother Jonathan Nilsson knows a great music guy; Viktor Envall, that agreed to create custom music with inspiration from Harry Brandelius ("det har kommit en båt med bananer"), and Fred Åkerström ("Gamla Nordsjön").

https://github.com/sebnil/shipper/releases/