title: My scrollViewDidScroll function is not receiving calls
body: <p>I'm trying to check if a user is scrolling up and down on my app but it's not calling my <code>scrollViewDidScroll</code> method</p>
  
  <p>Any ideas why it's not printing <code>received scroll</code> when I scroll up and down on the app?</p>
  
  <pre><code>import UIKit
  
  class CreateAccount: UIViewController, UITextFieldDelegate, UIScrollViewDelegate {
  
      @IBOutlet weak var scrollViewer: UIScrollView!
      @IBOutlet weak var usernameTextField: UITextField!
      @IBOutlet weak var emailTextField: UITextField!
      @IBOutlet weak var passwordTextField: UITextField!
      @IBOutlet weak var reenterPasswordTextField: UITextField!
  
      override func viewDidLoad() {
          super.viewDidLoad()
          // Do any additional setup after loading the view.
      }
  
      override func didReceiveMemoryWarning() {
          super.didReceiveMemoryWarning()
          // Dispose of any resources that can be recreated.
      }
  
      func scrollViewDidScroll(scrollView: UIScrollView) {
          print("received scroll")
      }
  
  }
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/1CrJb.png" rel="noreferrer"><img src="https://i.stack.imgur.com/1CrJb.png" alt="enter image description here"></a></p>