title: Facebook login always comes back as cancelled. (iOS Swift)
body: <p>I'm currently trying implement Facebook login using the 4.0 version of the SDK, this also happens with the 3.+ version. When I call <strong>logInWithReadPermissions</strong> (4.0 version) or <strong>openActiveSessionWithReadPermissions</strong> (3.+ version). The closure/block is called immediately with <strong>isCancelled</strong> (4.0 version) and <strong>ClosedFailedLogin</strong> (3.+ version) before the user can make a selection (<em>cancel</em> or <em>ok</em>). I thought it may be a problem with the URL Scheme in my plist settings but I've checked it over and over and everything seems to be right. Just wondering if anyone may have any ideas on solving this problem. My Bundle ID is right, single signin is on, native app is enabled, in the Facebook dev console. See some sample code and configurations below (4.0 version).</p>
  
  <p><strong>Login Call:</strong>
  <img src="https://i.stack.imgur.com/KkUye.png" alt="Login Call"></p>
  
  <p><strong>AppDelegate:</strong>
  <img src="https://i.stack.imgur.com/y8M15.png" alt="AppDelegate"></p>
  
  <p><strong>Plist:</strong>
  <img src="https://i.stack.imgur.com/Ew5Op.png" alt="Plist"></p>