Is it possible to referencing the specific Xamarin.IOS into Xamarin Form - xamarin.forms

Question

We are trying to combine the Xamarin code that one is created using Xamarin Form (non XAML) and the other one is purely Xamarin.IOS.
We look at the library of Xamarin.Essential and it looks it doesn't have CoreMotion.CMPedometer (iOS) as we need to count the steps.
Is it possible to run the code within the Xamarin Form (shared) to handle specific OS?
Thanks

Answer 1

Yes, you need to use a Dependency Service.
All of the doco can be found here ... https://learn.microsoft.com/en-us/xamarin/xamarin-forms/app-fundamentals/dependency-service/introduction
An example is shown here in relation to device information (which has been cut down for simplicity reasons)
Firstly, you create an interface in your .NET standard/PCL project (if you're not using shared that is, which is likely the case).
using System;
namespace MyApplication.Interfaces
{
public interface IDeviceInfo
{
String GetDeviceModel();
String GetDeviceVersion();
}
}
Then down in your platform specific project, create a Dependency Service that implements that interface and directs the compiler to recognise the class as a Dependency Service.
using System;
using MyApplication.Interfaces;
using UIKit;
[assembly: Xamarin.Forms.Dependency(typeof(MyApplication.iOS.DeviceInfo))]
Namespace MyApplication.iOS
{
public class DeviceInfo : IDeviceInfo
{
UIDevice _device;
Public DeviceInfo()
{
_device = new UIDevice();
}
public string GetDeviceModel()
{
return _device.Model;
}
public string GetDeviceVersion()
{
return _device.SystemVersion;
}
}
}
Now from your .NET standard/PCL project, you can call the dependency service as required.
var deviceModel = DependencyService.Get<IDeviceInfo>().GetDeviceModel();
The above is specific for iOS which means you'd then need to implement the same concept for Android and UWP (or whatever is applicable).
See if that helps you.