NSURLErrorDomain error code -999 in iOS

Question

I've been trying to use Corona SDK's Facebook API to post the score on the game I'm developing on facebook. However, I'm having a problem with it. During the first time I try to post to facebook, I get this error after login and user authentication:

NSURLErrorDomain error code -999

Then, it won't post on facebook. What are possible causes of this error and how can I address it? I tried searching the web but couldn't find information about it. Thanks in advance.

By the way, I am not using webview on my app. Just the widget api and a show_dialog listener in my Facebook class.

Answer 1

For my Cordova project (or similar), turns out it was a plugin issue. Make sure you're not missing any plugins and make sure they're installed properly without issue.

Easiest way to verify this is simply to start fresh by recreating the Cordova project (cordova create <path>) along with the required platforms (cordova platform add <platform name>) and add each plugin with the verbose flag (--verbose) so that you can see if anything went wrong in the console log while the plugin is being downloaded, added to project and installed for each platform (cordova plugin add cordova-plugin-device --verbose)

Recap: cordova create <path> cordova platform add <platform name> cordova plugin add cordova-plugin-device --verbose

Answer 2

I was getting this error in iOS specific version of Xamarin app. Not sure the underlying cause, but in my case was able to work around it by using post method instead of get for anything passing the server context in the request body -- which makes more sense anyway. Android / Windows / the service all handle the GET with content, but in iOS app will become partially unresponsive then spit out the 999 NSUrlErrorDomain stuff in the log. Hopefully, that helps someone else running into this. I assume the net code is getting stuck in a loop, but could not see the code in question.

Answer 3

I have faced the same error with Alamofire and it was because the certificate pinning. The certificate wasn't valid anymore, so I had to remove it and add the new one. Hope it helps.