How to put a native iOS class which implements DependencyService to an separate iOS library

I have a native iOS class which implements the Xamarin.Forms DependencyService, since I want to reuse this class in different projects, so I would like to extract this class from my current Xamarin.iOS app to a separate Xamarin.iOS library.

Here is my current project structure:

BDNC (Xamarin.Forms)

---IHTBluetoothManager (DependencyService Interface)

BDNC.iOS (Xamarin.iOS)

---HTBluetoothManager : IHTBluetoothManager (DependencyService Implementation)

I want to achieve something like:

BDNC (Xamarin.Forms)

---IHTBluetoothManager (DependencyService Interface)

BDNC.iOS (Xamarin.iOS App)

--- App codes

HTBluetoothKit (Xamarin.iOS Library)

---HTBluetoothManager : IHTBluetoothManager (DependencyService Implementation)

Please help.