Toolbar with “Previous” and “Next” for Keyboard inputAccessoryView

Question

I\'ve been trying to implement this toolbar, where only the \'Next\' button is enabled when the top textField is the firstResponder and only the \'Previous\' button is enabl

Answer 1

Here is a UIViewController extension that I use whenever I need a group of UITextFields to provide navigation via input accessory. No need to use UITextField delegation with this approach, and adding the behavior to multiple forms becomes a single-liner. Also supports the 'Done' button to dismiss.

extension UIViewController {
  func addInputAccessoryForTextFields(textFields: [UITextField], dismissable: Bool = true, previousNextable: Bool = false) {
    for (index, textField) in textFields.enumerated() {
      let toolbar: UIToolbar = UIToolbar()
      toolbar.sizeToFit()

      var items = [UIBarButtonItem]()
      if previousNextable {
        let previousButton = UIBarButtonItem(image: UIImage(named: "Backward Arrow"), style: .plain, target: nil, action: nil)
        previousButton.width = 30
        if textField == textFields.first {
          previousButton.isEnabled = false
        } else {
          previousButton.target = textFields[index - 1]
          previousButton.action = #selector(UITextField.becomeFirstResponder)
        }

        let nextButton = UIBarButtonItem(image: UIImage(named: "Forward Arrow"), style: .plain, target: nil, action: nil)
        nextButton.width = 30
        if textField == textFields.last {
          nextButton.isEnabled = false
        } else {
          nextButton.target = textFields[index + 1]
          nextButton.action = #selector(UITextField.becomeFirstResponder)
        }
        items.append(contentsOf: [previousButton, nextButton])
      }

      let spacer = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
      let doneButton = UIBarButtonItem(barButtonSystemItem: .done, target: view, action: #selector(UIView.endEditing))
      items.append(contentsOf: [spacer, doneButton])


      toolbar.setItems(items, animated: false)
      textField.inputAccessoryView = toolbar
    }
  }
}

example:

let field1 = UITextField()
let field2 = UITextField()
addInputAccessoryForTextFields([field1, field2], dismissable: true, previousNextable: true)

Here's a reasonable arrow icon.