Error when trying to implement FB authentication into iOS app
<p>I'm having issues when trying to run my first social network program. I've been following Mark Prices iOS programming guide for Swift 3 and my issue comes about when I try to login to FB. When I login the screen turns white and then in my error dialog it shows:</p>

<p><strong>2016-10-17 13:35:16.744 sinogrecosocialnetwork[31605:]  Implementation of application:openURL:sourceApplication:annotation: not found. Please add the handler into your App Delegate. Class: sinogrecosocialnetwork.AppDelegate</strong> </p>

<p>And I'm not entirely sure what it means. I've tried rewriting everything that the tutorial shows me, but I'm lost. What can I do to fix this?</p>

<p>Thank you.</p>