requestReview() deprecated in iOS 14, Alternative for xamarin.forms?

Issue

I'm using

SKStoreReviewController.RequestReview ();

in a dependency service for Xamarin.Forms. However this is now deprecated from iOS 14. And I want to know how to integrate with the new UIWindowScene

requestReview(in windowScene: UIWindowScene)

in Xamarin.Forms

Solution

First, you can try to add SKStoreReviewController.RequestReview(Window.WindowScene) in the FinishedLaunching method of your xxx.ios->AppDelegate.cs; start the project to see if it is correct.

If the above method goes wrong, using DependencyService is the right way to go.

Here is the interface code:

 public interface MyInterface
{
     void RequestReview();
}

Here is the implementation method of the interface in ios:

[assembly: Dependency(typeof(MyInterfaceImpl))]
namespace App19.iOS
{
    public class MyInterfaceImpl : MyInterface
    {
        public void RequestReview()
        {
           var myv = UIDevice.CurrentDevice.CheckSystemVersion(14, 0);
            if (myv)
            {
                UIWindow window = UIApplication.SharedApplication.Delegate.GetWindow();
            SKStoreReviewController.RequestReview(window.WindowScene);
            }
            else 
            {
                SKStoreReviewController.RequestReview();
            }
        }
    }
}

You can call it in the OnStart method inside APP.xaml.cs:

 protected override void OnStart()
    {
        if (Device.RuntimePlatform == Device.iOS)
        {
            DependencyService.Get<IReviewService>().RequestReview();
        }
    }

Answered By - Wen xu Li - MSFT