thing.swift

func getRequest(urlString: String, completion: (NSDictionary) -> Void) {
   
   let defaultSession = NSURLSession(configuration: NSURLSessionConfiguration.defaultSessionConfiguration())
   let urlPath: String = urlString.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())!
   let url: NSURL = NSURL(string: urlPath)!
   let request: NSURLRequest = NSURLRequest(URL: url)
   
   do {
      let task = defaultSession.dataTaskWithRequest(request, completionHandler: { (data, response, error) in
           
         do {
               
            if data != nil {
               if let jsonResult = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? NSDictionary {
                  completion(jsonResult)
               }
            }
               
               
         } catch let error as NSError {
            print(error.localizedDescription)
         }
      
      })
       
      task.resume()
   }
}