CODEWITHSUNDEEP
iosswiftuitextfield
Lance Samaria
Lance Samaria

Reputation: 19572

iOS -Textfield's shouldChangeCharactersIn range is disabling .editingChanged's target method

I have a textField that I disable capital letters by setting .autocapitalizationType = .none and in shouldChangeCharactersIn range I replace any capital letters with lowercased letters by using this answer.

Forcing only lowercase letters works fine but the target method I added to .editingChanged stopped working.

Why did .editingChanged stop working?

let emailTextField: UITextField = {
    let textField = UITextField()
    return textField
}()

let userNameTextField: UITextField = {
    let textField = UITextField()
    textField.autocapitalizationType = .none
    textField.addTarget(self, action: #selector(printSomething), for: .editingChanged)
    return textField
}()

@objc func printSomething() {
    // as I type inside the usernameTextField this no longer prints
    print("something")
}

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {

    // only change characters for username textfield
    if textField == userNameTextField {

        userNameTextField.text = (textField.text! as NSString).replacingCharacters(in: range, with: string.lowercased())
        return false
    }
    return true
}

Upvotes: 0

Views: 809

Answers (2)

Leo Dabus
Leo Dabus

Reputation: 236295

The problem is your userNameTextField declaration. When you initialise it there is no self. You need to change its declaration to lazy:

lazy var userNameTextField: UITextField = {
    let textField = UITextField()
    textField.autocapitalizationType = .none
    textField.addTarget(self, action: #selector(editingChanged), for: .editingChanged)
    return textField
}()

I would also remove the shouldChangeCharacters in range and do all your character manipulation inside editingChanged method:

@objc func editingChanged(_ textField: UITextField) {
    print(textField.text!)
    textField.text = textField.text!.lowercased()
}

Upvotes: 0

user1376400
user1376400

Reputation: 624

Change to return true 

   if textField == userNameTextField {

        userNameTextField.text = (textField.text! as NSString).replacingCharacters(in: range, with: string.lowercased())
        return true
    }

Upvotes: 1

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