What s a redirect URI how does it apply to iOS app for OAuth2 0

Question

Beginner programmer here  please pardon ignorance  amp  explanations will be really nice     I ve tried to read the tutorials for a certain OAuth 2 0 service  but I don t understand this redirect URI    in my particular context  let s say I m trying to build an iPhone app that uses OAuth 2 0 for some service  I have an App ID that was generated  but i need to provide some sort of redirect URI to generate the API key    Is this a URL that I m supposed to host somewhere myself   As the name suggests  I would think that the redirect URL is supposed to  redirect  someone somewhere  My only guess is that it s the URL a user is redirected to after they log in to the service   However  even if that assumption is correct  I don t understand one other thing - how can my app be opened again after I ve sent them to the browser for the user login

User · Answer

Take a look at OAuth 2 0 playground You will get an overview of the protocol It is basically an environment like any app  that shows you the steps involved in the protocol   https   developers google com oauthplayground

User · Answer

redirected uri is the location where the user will be redirected after successfully login to your app  for example to get access token for your app in facebook you need to subimt redirected uri which is nothing only the app Domain that your provide when you create your facebook app

User · Answer

Read this   http   www quora com OAuth-2-0 How-does-OAuth-2-0-work  or an even simpler but quick explanation   http   agileanswer blogspot se 2012 08 oauth-20-for-my-ninth-grader html  The redirect URI is the callback entry point of the app  Think about how OAuth for Facebook works - after end user accepts permissions   something  has to be called by Facebook to get back to the app  and that  something  is the redirect URI  Furthermore  the redirect URI should be different than the initial entry point of the app   The other key point to this puzzle is that you could launch your app from a URL given to a webview  To do this  i simply followed the guide on here   http   iosdevelopertips com cocoa launching-your-own-application-via-a-custom-url-scheme html  and   http   inchoo net mobile-development iphone-development launching-application-via-url-scheme   note  on those last 2 links   http     works in opening mobile safari but  tel     doesn t work in simulator  in the first app  I call     UIApplication sharedApplication  openURL  NSURL URLWithString   secondApp          In my second app  I register  secondApp   and NOT  secondApp      as the name of URL Scheme  with my company as the URL identifier

User · Answer

If you are using Facebook SDK  you don t need to bother yourself to enter anything for redirect URI on the app management page of facebook  Just setup a  URL scheme for your iOS app  The URL scheme of your app should be a value  fbxxxxxxxxxxx  where xxxxxxxxxxx is your app id as identified on facebook  To setup URL scheme for your iOS app  go to info tab of your app settings and add URL Type

[ios] What's a redirect URI? how does it apply to iOS app for OAuth2.0?

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