How you can use Xamarin.Auth when you're using Xamarin.Forms?
I have this:
async public System.Threading.Tasks.Task<bool> LoginWithFacebook (object dialog, string FacebookAppID)
{
var user = new ParseUser ();
var auth = new OAuth2Authenticator (
clientId: FacebookAppID,
scope: "",
authorizeUrl: new Uri ("https://m.facebook.com/dialog/oauth/"),
redirectUrl: new Uri ("http://www.facebook.com/connect/login_success.html"));
auth.AllowCancel = true;
// If authorization succeeds or is canceled, .Completed will be fired.
auth.Completed += async (object sender, AuthenticatorCompletedEventArgs ee) => {
// Now that we're logged in, make a OAuth2 request to get the user's info.
var accessToken = ee.Account.Properties ["access_token"].ToString ();
var expiresIn = Convert.ToDouble (ee.Account.Properties ["expires_in"]);
var expiryDate = DateTime.Now + TimeSpan.FromSeconds (expiresIn);
// Now that we're logged in, make a OAuth2 request to get the user's id.
var request = new OAuth2Request ("GET", new Uri ("https://graph.facebook.com/me"), null, ee.Account);
var response = await request.GetResponseAsync ();
var obj = JObject.Parse (response.GetResponseText ());
var id = obj ["id"].ToString ().Replace ("\"", ""); // Id has extraneous quotation marks
user = await ParseFacebookUtils.LogInAsync (id, accessToken, expiryDate);
};
var dvc = ((DialogViewController)dialog);
dvc.PresentViewController (auth.GetUI (), true, null);
return user.IsAuthenticated;
}
But I can't cast ContentPage to DialogViewController or an Activity
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