When following the instructions here, there are a few instructions unclear or slightly outdated. You should end up with an AppDelegate class similar to this:

In your child project, add a new target by going into the project properties, clicking the + icon and picking Cross-platform > Other > Aggregate.

Getting the version string and the build number, in Objective-C, Swift, and C# (Xamarin)

Respond to the appearing and disappearing of the keyboard and also dismiss it by ‘outside’ taps in similar fashion to Android.

Simply add another file to your project dedicated to the following UIColor extension: