Switching between Text fields on pressing return key in Swift

Question

I\'m designing an iOS app and I want that when the return key is pressed in my iPhone it directs me to the next following text field.

I have found a couple of similar

Answer 1

the easiest way to change to next text Field is this no need for long code

override func viewDidLoad() {
        super.viewDidLoad()

        emailTextField.delegate = self
        passwordTextField.delegate = self
    }


    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        if textField == emailTextField {
            passwordTextField.becomeFirstResponder()
        }else {
            passwordTextField.resignFirstResponder()
        }
            return true
    }

Answer 2

If you have a lot of textfield components my be it could be better to use an outlet collection, linking textfields and setting Return Key from interface builder

@IBOutlet var formTextFields: [UITextField]!

override func viewDidLoad() {
  for textField in formTextFields {
    textField.delegate = self
  }
}

extension RegisterViewController: UITextFieldDelegate {
  func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    if let componentIndex = formTextFields.firstIndex(of: textField) {
      if textField.returnKeyType == .next,
        componentIndex < (formTextFields.count - 1) {
        formTextFields[componentIndex + 1].becomeFirstResponder()
      } else {
        textField.resignFirstResponder()
      }
    }
    return true
  }
}

Answer 3

Swift & Programmatically

class MyViewController: UIViewController, UITextFieldDelegate {

    let textFieldA = UITextField()
    let textFieldB = UITextField()
    let textFieldC = UITextField()
    let textFieldD = UITextField()

    var textFields: [UITextField] {
        return [textFieldA, textFieldB, textFieldC, textFieldD]
    }

    override func viewDidLoad() {
        // layout textfields somewhere 
        // then set delegate
        textFields.forEach { $0.delegate = self }
    }

    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        if let selectedTextFieldIndex = textFields.firstIndex(of: textField), selectedTextFieldIndex < textFields.count - 1 {
            textFields[selectedTextFieldIndex + 1].becomeFirstResponder()
        } else {
            textField.resignFirstResponder() // last textfield, dismiss keyboard directly
        }
        return true
    }
}

Answer 4

No any special, here is my currently using to change the textFiled. So the code in ViewController looks good :). #Swift4

final class SomeTextFiled: UITextField {

  public var actionKeyboardReturn: (() -> ())?

  override init(frame: CGRect) {
      super.init(frame: frame)
      super.delegate = self
  }

  required init?(coder aDecoder: NSCoder) {
      super.init(coder: aDecoder)
      fatalError("init(coder:) has not been implemented")
  }

  func textFieldShouldReturn(_ textField: UITextField) -> Bool {
      self.resignFirstResponder()
      actionKeyboardReturn?()
      return true
   }
}

extension SomeTextFiled: UITextFieldDelegate {}


class MyViewController : UIViewController {

    var tfName: SomeTextFiled!
    var tfEmail: SomeTextFiled!
    var tfPassword: SomeTextFiled!

    override func viewDidLoad() {
        super.viewDidLoad()
        tfName = SomeTextFiled(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
        tfName.actionKeyboardReturn = { [weak self] in
            self?.tfEmail.becomeFirstResponder()
        }
        tfEmail = SomeTextFiled(frame: CGRect(x: 100, y: 0, width: 100, height: 100))
        tfEmail.actionKeyboardReturn = { [weak self] in
            self?.tfPassword.becomeFirstResponder()
        }
        tfPassword = SomeTextFiled(frame: CGRect(x: 200, y: 0, width: 100, height: 100))
        tfPassword.actionKeyboardReturn = {
            /// Do some further code
        }
    }
}

Answer 5

Make sure your UITextField delegates are set and the tags are incremented properly. This can also be done through the Interface Builder.

Here's a link to an Obj-C post I found: How to navigate through textfields (Next / Done Buttons)

class ViewController: UIViewController,UITextFieldDelegate {
   // Link each UITextField (Not necessary if delegate and tag are set in Interface Builder)
   @IBOutlet weak var someTextField: UITextField!

   override func viewDidLoad() {
      super.viewDidLoad()
      // Do the next two lines for each UITextField here or in the Interface Builder
      someTextField.delegate = self
      someTextField.tag = 0 //Increment accordingly
   }

   func textFieldShouldReturn(_ textField: UITextField) -> Bool {
      // Try to find next responder
      if let nextField = textField.superview?.viewWithTag(textField.tag + 1) as? UITextField {
         nextField.becomeFirstResponder()
      } else {
         // Not found, so remove keyboard.
         textField.resignFirstResponder()
      }
      // Do not add a line break
      return false
   }
}

Answer 6

Caleb's version in Swift 4.0

func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    if let nextField = self.view.viewWithTag(textField.tag + 1) as? UITextField {
        nextField.becomeFirstResponder()
    } else {
        textField.resignFirstResponder()
    }
    return false
}

P.S. textField.superview? not working for me