Xamarin CheckBoxRenderer and DependencyService

I have a fully working android app in xamarin form + android custom renderer + Xamarin.Forms.DependencyService. I need an equivalent IOS custom renderer and dependensyService that works with my SampleCommonCode in xamarin forms. I will provide the android custom renderer code and a test project, you need to provide the same functional code in IOS custom renderer and DependencyService in a IOS xamarin project ([login to view URL] and [login to view URL]). Please fix CheckBoxRenderer in IOS (code is there, but doesn't show up). You need to implement these following functions in Xamarin IOS ([login to view URL]): string GetDeviceStorageFolder(); string GetDeviceExtenalStorageFolder(); string GetMyPhoneNumber(); void ToastMessage(string message, bool shortLength ); string GetDeviceId(); List<ContactPhone> GetContactPhoneNumbers(); The code should not be crashing or freezing. The code should be written in visual studio community version 2017 on the desktop windows. You need to provide a video clip to show its full functionality. (I don't have testing setup for IOS device, only have a IOS simulation). You can guide me to set up the IOS device if you don't want to create a video clip. This is code snippet in Android custom renderer: