Set the accessibility Id

UIViewHelpers

public static class UIViewHelpers
{
    static readonly IntPtr selAccessibilityIdentifier_Handle = Selector.GetHandle("accessibilityIdentifier");
    static readonly IntPtr setAccessibilityIdentifier_Handle = Selector.GetHandle("setAccessibilityIdentifier:");

    public static UIView SetAccessibilityId(this UIView view, string id)
    {
        var intPtr = NSString.CreateNative(id);
        Messaging.void_objc_msgSend_IntPtr(view.Handle, setAccessibilityIdentifier_Handle, intPtr);
        NSString.ReleaseNative(intPtr);
        return view;
    }

    public static string GetAccessibilityId(this UIView view)
    {
        return NSString.FromHandle(Messaging.IntPtr_objc_msgSend(view.Handle, selAccessibilityIdentifier_Handle));
    }
}