topic Re: Error getting default parameters: Cannot call this method in this context in ArcGIS Runtime SDK for iOS Questions

Error getting default parameters: Cannot call this method in this context

SamerAbraham — Sun, 24 Feb 2019 18:53:12 GMT

Hello

I'm calling the route service from iOS as follows:

let routeTask = AGSRouteTask(url: URL(string: "https://route.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World")!)

routeTask.defaultRouteParameters { [weak self] (defaultParameters, error) in guard error == nil else {

print("Error getting default parameters: \(error!.localizedDescription)")

return

}

I keep hitting the error condition with Error Code 15 stating "Error getting default parameters: Cannot call this method in this context".

Anyone have any leads on what might cause this?

Thanks

Re: Error getting default parameters: Cannot call this method in this context

Nicholas-Furness — Thu, 28 Feb 2019 01:54:01 GMT

That's the right URL. Should just work (I can't reproduce it here).

Is your routeTask going out of scope for some reason?

And which version of the Runtime SDK are you using?

Re: Error getting default parameters: Cannot call this method in this context

PhilipGruenler — Fri, 01 Mar 2019 21:16:38 GMT

Are you providing a credential to the routeTask or logging in when prompted? The world routing service is a paid service and requires a login.

Re: Error getting default parameters: Cannot call this method in this context

SamerAbraham — Sat, 02 Mar 2019 02:48:21 GMT

Yes I was using my keys.

Re: Error getting default parameters: Cannot call this method in this context

SamerAbraham — Sat, 02 Mar 2019 02:48:50 GMT

It's 100.4. I can't get it to work.

Re: Error getting default parameters: Cannot call this method in this context

SamerAbraham — Sat, 02 Mar 2019 12:39:51 GMT

For some reason I don't see the post but I saw an email where someone asked me if the routeTask was a class level or method level variable. It is class level per the example I saw.

Re: Error getting default parameters: Cannot call this method in this context

SamerAbraham — Sat, 02 Mar 2019 12:50:58 GMT

I should also say that that would be a terrible error message for missing creds or payment info. Since it's iOS this is how the example shows you to handle sign in at the AppDelegate:

private func setupOAuthManager() {

let config = AGSOAuthConfiguration(portalURL: nil, clientID: AppConfiguration.clientID, redirectURL: "\(AppConfiguration.urlScheme)://\(AppConfiguration.urlAuthPath)")

AGSAuthenticationManager.shared().oAuthConfigurations.add(config)

AGSAuthenticationManager.shared().credentialCache.enableAutoSyncToKeychain(withIdentifier: AppConfiguration.keychainIdentifier, accessGroup: nil, acrossDevices: false)

}

Once you do that you get a sign in page so I signed in using my id.

Re: Error getting default parameters: Cannot call this method in this context

Nicholas-Furness — Sat, 02 Mar 2019 13:55:30 GMT

Comment out the line AGSAuthenticationManager.shared().oAuthConfigurations.add(config).

Then when you call routeTask.defaultRouteParameters you should be prompted with an alert box for your credentials instead. If you enter your credentials (it should be a free developer account or an ArcGIS Online organizational account, not a personal account), you'll be fine.

I think there may be one of two things going on:

1. You're using a personal Esri account OR

2. There's an issue with how your app's OAuth configuration is being defined. But if you're entering your credentials through the OAuth page and control returns to your app, that doesn't seem likely to be the case.

If it turns out to be 1) above, yes, I agree, that error message is not good and we'll have to improve that.

Let me know if this helps.

Re: Error getting default parameters: Cannot call this method in this context

Nicholas-Furness — Sat, 02 Mar 2019 13:56:16 GMT

I think that was my original reply above, which I edited to be more explicit/correct.

Re: Error getting default parameters: Cannot call this method in this context

Nicholas-Furness — Wed, 13 Mar 2019 14:58:52 GMT

Hi Samer Abraham. Were you able to make any progress? Was it the type of account that you were using?

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Re: Error getting default parameters: Cannot call this method in this context

SamerAbraham — Sat, 16 Mar 2019 02:39:04 GMT

Sorry to be honest I totally gave up on this as I was able to solve it quickly with a different vendor.

I spent a little time on it just now since you asked and it's easy to switch implementation. I removed the auth line from AppDelegate, I got prompted when the call was made, and the ordered list is returned. Since I'm using the same creds I was using before I would guess it was 2) from your two possibilities above.

Re: Error getting default parameters: Cannot call this method in this context

Nicholas-Furness — Tue, 19 Mar 2019 15:28:37 GMT

It sounds like it.

Assuming you used the Maps App as your starting point, did you follow the steps in "Register an Application" and "Configure the project"? I'm intrigued as to precisely what went wrong so that I can see if we can do better with the instructions and the error messages.

Re: Error getting default parameters: Cannot call this method in this context

SamerAbraham — Wed, 20 Mar 2019 00:56:59 GMT

Not exactly. I was something like this Sample Code—ArcGIS Runtime SDK for iOS | ArcGIS for Developers not github. Steps are pretty similar if not exactly the same however I started from an existing project not the sample code.

Re: Error getting default parameters: Cannot call this method in this context

Nicholas-Furness — Wed, 20 Mar 2019 02:36:04 GMT

It looks like you took the authentication code from the OAuth 2 DevLab. It's hard to know where things went wrong, but I would like to dig a little deeper in case we can improve things.

I know you moved on from the point where things weren't working, but if you are able to DM me an Xcode project that shows this behavior, I'd be happy to take a look.

Let me know.