ViewController.swift

import UIKit

class ViewController: UIViewController, UIWebViewDelegate {
    
    var webView: UIWebView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
    }

    @IBAction func twitterLogin(sender: UIButton) {
        
        webView = UIWebView(frame: CGRectMake(0, 0, UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height))
        webView.loadRequest(NSURLRequest(URL: NSURL(string: "http://xxxxxxxxx.com:2403/auth/twitter")!))
        webView.delegate = self;
        self.view.addSubview(webView)
    }
    
    
    func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
        let splitURL = request.URL!.absoluteString.characters.split{$0 == "?"}.map(String.init)
        
        print(splitURL)
        
        if splitURL[0]  == "http://xxxxxxxxx.com:2403/auth/twitter/callback" {
                    webView.stopLoading();
                    let url = NSURL(string: request.URL!.absoluteString)
                    let task = NSURLSession.sharedSession().dataTaskWithURL(url!) {(data, response, error) in
                    let datastring = NSString(data: data!, encoding: NSUTF8StringEncoding)
                    let responsedata = self.convertStringToDictionary(datastring as! String);
                        
                        print("\(responsedata!["id"])");
                        
                        print(responsedata!)
                        
                        dispatch_async(dispatch_get_main_queue(), {                        
                        webView.removeFromSuperview()
                        })
                    }
                    task.resume()
        }
        
        return true
    }
    
    func convertStringToDictionary(text: String) -> [String:AnyObject]? {
        if let data = text.dataUsingEncoding(NSUTF8StringEncoding) {
            do {
                return try NSJSONSerialization.JSONObjectWithData(data, options: []) as? [String:AnyObject]
            } catch let error as NSError {
                print(error)
            }
        }
        return nil
    }
    
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
}