CODEWITHSUNDEEP
iosswiftxcodetextfield
Senator
Senator

Reputation: 83

Character Count Not Working on 2nd Text Field

I'm building a simple Welcome page that has a Name & Age text input field. I was able to successfully limit the character input count on the name field, but using the same logic on the age field has not worked at all. Thoughts?

class WelcomeViewController: UIViewController, UITextFieldDelegate {


@IBOutlet weak var nameTextField: UITextField!

@IBOutlet weak var ageTextField: UITextField!



override func viewDidLoad() {
    super.viewDidLoad()
    
    nameTextField.delegate = self
    ageTextField.delegate = self
    
}


// Character Count Code UITextField
func textField(_ nameTextField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
    // get the current text, or use an empty string if that failed
    let currentText = nameTextField.text ?? ""

    // attempt to read the range they are trying to change, or exit if we can't
    guard let stringRange = Range(range, in: currentText) else { return false }

    // add their new text to the existing text
    let updatedText = currentText.replacingCharacters(in: stringRange, with: string)

    // make sure the result is under # characters
    return updatedText.count <= 30
}

func textField2(_ ageTextField: UITextField, shouldChangeCharactersIn range2: NSRange, replacementString string2: String) -> Bool {
    // get the current text, or use an empty string if that failed
    let currentText2 = ageTextField.text ?? ""

    // attempt to read the range they are trying to change, or exit if we can't
    guard let stringRange2 = Range(range2, in: currentText2) else { return false }

    // add their new text to the existing text
    let updatedText2 = currentText2.replacingCharacters(in: stringRange2, with: string2)

    // make sure the result is under # characters
    return updatedText2.count <= 2
}

Upvotes: 0

Views: 219

Answers (1)

jnpdx
jnpdx

Reputation: 52397

The delegate method has a specific signature (textField(_:shouldChangeCharactersIn:replacementString:)) that is called by the system. Your first function uses that pattern.

Your second one, currently, does not, since you've named it textField2 -- the system has no reason to know to call something starting with that prefix.

Instead, you should probably use a single function and then have it behave differently based on which UITextField is sent in to the first parameter:

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
    if textField == nameTextField {
      //content
    }
    if textField == ageTextField {
      //content
    }
}

This could obviously be an else if, or even just an else if you stay limited to 2 text fields. Within the if block, you could either call out to a separate, specialized function, or keep all of your logic within the if block.

Example with switch:

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
    switch textfield {
    case nameTextField:
      //content
    case ageTextField:
      //content
    default:
      return true
    }
}

Upvotes: 3

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