Switching between Text fields on pressing return k

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 questions, with excellent answers around but they all just happen to be in Objective-C and I'm looking for Swift code, now this is what I have up until now:

func textFieldShouldReturn(emaillabel: UITextField) -> Bool{
    return true
}

It's placed in the file that's connected and controller to the UIView that contains the text fields, but I'm not sure if thats the right place.

I'm basically new to swift, so explain every little step or i'll manage to mess it up somehow. Also I'm using the latest version of Xcode if that makes any difference.

okay, so I tried this out and got this error:
//could not find an overload for '!=' that accepts the supplied arguments

func textFieldShouldReturn(textField: UITextField) -> Bool {
    let nextTag: NSInteger = textField.tag + 1;
    // Try to find next responder
    let nextResponder: UIResponder = textField.superview!.viewWithTag(nextTag)!
    if (nextResponder != nil) {//could not find an overload for '!=' that accepts the supplied arguments

        // Found next responder, so set it.
        nextResponder.becomeFirstResponder()
    } else {
        // Not found, so remove keyboard.
        textField.resignFirstResponder()
    }
    return false; // We do not want UITextField to insert line-breaks.
}

Thanks in advance pals!!

Answer 1

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

Answer 2

Just use becomeFirstResponder() method of UIResponder class in your textFieldShouldReturn method. Every UIView objects are UIResponder's subclasses.

if self.emaillabel.isEqual(self.anotherTextField)
{
    self.anotherTextField.becomeFirstResponder()
}

You can find more information about becomeFirstResponder() method at Apple Doc's in here.

Answer 3

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 4

I suggest that you should use switch statement in textFieldShouldReturn(_:).

// MARK: UITextFieldDelegate

func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    switch textField {
    case nameTextField:
        phoneTextField.becomeFirstResponder()
    case phoneTextField:
        emailTextField.becomeFirstResponder()
    case emailTextField:
        descriptionTextField.becomeFirstResponder()
    default:
        textField.resignFirstResponder()
    }
    return false
}