title: Facebook SDK how to handle custom login in swift?
body: <p>I am implementing a Facebook login in my app and I just need to store the token for the session but without using the standard Facebook button...</p>
  
  <p>I managed to use:</p>
  
  <pre><code>FBSDKLoginManager().logInWithPublishPermissions(["publish_actions"], handler: nil)
  </code></pre>
  
  <p>which works exactly as expected... Now I am learning Swift and I have no knowledge of Obj-C (although it's becoming more and more obvious that I will need some at some point) how do I implement the handler to, say perform</p>
  
  <pre><code>println(FBSDKAccessToken.currentAccessToken())
  </code></pre>
  
  <p>upon completion?</p>
  
  <p>Thanks!</p>