private async Task GetRatesAsync()
{
// We're now fetching the rates from Shopify. This will will calculate shipping rates very similarly to how our web checkout.
// We then turn our BUYShippingRate objects into PKShippingMethods for Apple to present to the user.
if (checkout.RequiresShipping)
{
try
{
BuyClient.ShippingRatesForCheckoutResult result;
while ((result = await client.GetShippingRatesForCheckoutAsync(checkout)).Status == Status.Processing)
{
await Task.Delay(500);
}
shippingRates = result.ShippingRates;
}
catch (NSErrorException ex)
{
Console.WriteLine("Failed to retrieve shipping rates: {0}", ex.Error);
}
}
}