问题
[TwitterKit] did encounter error with message "Error obtaining user auth token.": Error Domain=TWTRLogInErrorDomain Code=-1 "Callback URL not approved for this client application. Approved callback URLs can be adjusted in your application settings" UserInfo={NSLocalizedDescription=Callback URL not approved for this client application. Approved callback URLs can be adjusted in your application settings}
回答1:
i solved this by inputting twitterkit-xxx[appkey]:// on CallbackURLs in website https://apps.twitter.com
回答2:
You need to go to your app in https://apps.twitter.com and enter your callback URLs
回答3:
You should add your callback url in your twitter app. See the image below.
来源：https://stackoverflow.com/questions/50831885/twitter-log-in-website-failure-415