Using OAuth 2 on a mobile divice without a redirect URI to a web server
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I am working on developing my app using a company's web service API.  

When registering for the API key, the company require me to submit a redirect URI.  

It is easy to display a web page in my IOS app and send the user to authorization server and let them grant me the access, but I cannot figure out how to obtain an URI of my own Iphone + the port of my app  so the authorization server can send back access token to my application.

Is there a different way to deal with OAuth 2.0 in mobile application without setting a web server and use its URI as a redirect URI ?

I could not find any related issue on Stack Overflow.  Please send me some links if there exist a solution for this.

Thank you.