Please, next time, try to clarify the problem more - eg whether it applies to SwiftUI, UIKit, etc., because it's hard to guess. Below I present my solution with the usage of UIKit: import UIKit class ViewController: UIViewController, UITextFieldDelegate  {     // MARK: Properties     var array: [String] = []     let textField: UITextField = {         let textField = UITextField(frame: CGRect(x: 5,                                                   y: UIScreen.main.bounds.height / 2,                                                   width: UIScreen.main.bounds.width - 10,                                                   height: 50))         textField.returnKeyType = .done // << This line changes return to the done key.         textField.backgroundColor = UIColor.darkGray         return textField     }()     override func viewDidLoad() {         super.viewDidLoad()         // Set the delegate and add TextField to the subview         textField.delegate = self         view.addSubview(textField)     }     func textFieldShouldReturn(_ textField: UITextField) -> Bool {         // Add the TextField value to the array         guard let value = textField.text else { return false }         array.append(value)         // Hide keyboard         textField.resignFirstResponder()         return true     } }