title: How to fix: "Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value"
body: <p>I am a totally new to swift. I am trying to set up a screen with 3 textfields so the user can enter data. I used the code line: <code>nameField.delegate = self</code> , but I always get an error message: <code>Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value</code>. Could anybody help me fixing that problem? :)</p>
  
  <p>I have already tried to force unwrap the value, but that did not work.</p>
  
  <pre><code>private func configureTextFields(){
         nameField.delegate = self
         amountField.delegate = self
         dateField.delegate = self
     }
  </code></pre>
  
  <p>I also set up an extension at the bottom. Maybe I did a mistake there:</p>
  
  <pre><code>extension ViewController : UITextFieldDelegate {
      func textFieldShouldReturn(_ textField: UITextField) -&gt; Bool {
          textField.resignFirstResponder()
          return true
      }
  }
  </code></pre>
  
  <p>.</p>