AuthView.swift

import UIKit
import Accounts
import Social
import SwifteriOS

class AuthViewController: UIViewController {
  
  var swifter: Swifter
  
  // Default to using the iOS account framework for handling twitter auth
  let useACAccount = true
  
  required init(coder aDecoder: NSCoder) {
    self.swifter = Swifter(consumerKey: "RErEmzj7ijDkJr60ayE2gjSHT", consumerSecret: "SbS0CHk11oJdALARa7NDik0nty4pXvAxdt7aj0R5y1gNzWaNEx")
    super.init(coder: aDecoder)
  }
  
  @IBAction func didTouchUpInsideLoginButton(sender: AnyObject) {
    let failureHandler: ((NSError) -> Void) = {
      error in
      
      self.alertWithTitle("Error", message: error.localizedDescription)
    }
    
    if useACAccount {
      let accountStore = ACAccountStore()
      let accountType = accountStore.accountTypeWithAccountTypeIdentifier(ACAccountTypeIdentifierTwitter)
      
      // Prompt the user for permission to their twitter account stored in the phone's settings
      accountStore.requestAccessToAccountsWithType(accountType, options: nil) {
        granted, error in
        
        if granted {
          let twitterAccounts = accountStore.accountsWithAccountType(accountType)
          
          if twitterAccounts?.count == 0
          {
            self.alertWithTitle("Error", message: "There are no Twitter accounts configured. You can add or create a Twitter account in Settings.")
          }
          else {
            let twitterAccount = twitterAccounts[0] as ACAccount
            self.swifter = Swifter(account: twitterAccount)
            self.fetchTwitterHomeStream()
          }
        }
        else {
          self.alertWithTitle("Error", message: error.localizedDescription)
        }
      }
    }
    else {
      swifter.authorizeWithCallbackURL(NSURL(string: "swifter://success")!, success: {
        accessToken, response in
        
        self.fetchTwitterHomeStream()
        
        },failure: failureHandler
      )
    }
  }
  
  func fetchTwitterHomeStream() {
    let failureHandler: ((NSError) -> Void) = {
      error in
      self.alertWithTitle("Error", message: error.localizedDescription)
    }
    
    self.swifter.getStatusesHomeTimelineWithCount(20, sinceID: nil, maxID: nil, trimUser: true, contributorDetails: false, includeEntities: true, success: {
      (statuses: [JSONValue]?) in
      
      // Successfully fetched timeline, so lets create and push the table view
      let tweetsViewController = self.storyboard!.instantiateViewControllerWithIdentifier("TweetsViewController") as TweetsViewController
      
      if statuses != nil {
        tweetsViewController.tweets = statuses!
        self.presentViewController(tweetsViewController, animated: true, completion: nil)
      }
      
      }, failure: failureHandler)
    
  }
  
  func alertWithTitle(title: String, message: String) {
    var alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.Alert)
    alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
    self.presentViewController(alert, animated: true, completion: nil)
  }
  
}

It is not return callback function of the app at this code, please help :

swifter.authorizeWithCallbackURL(NSURL(string: "swifter://success")!, success: {
accessToken, response in

    self.fetchTwitterHomeStream()

    },failure: failureHandler
  )