iOS 11 disable password autofill accessory view option?

Question

As of now I would like to opt out of the new option iOS 11 gives, that is to suggest passwords in the app. When I run the app on iOS 11 I get the autofill option on top of t

Answer 1

I think set all UITextField textContentType in form to UITextContentType("") or .oneTimeCode is not a clean solution. Enable/Disable isSecureTextEntry still give you the same issue.

@Gal Shahar 's Answer is nice but it is still not perfect. The masked char is not the same as the masked char that used in secure entry text from apple. It should use Unicode Character 'BLACK CIRCLE' (U+25CF) https://www.fileformat.info/info/unicode/char/25cf/index.htm

Also, it is not handling cursor movement. It will change the cursor position to the end of the text when inserting text in the middle. It will give you the wrong value when selecting and replacing text.

When you decide to use custom isSecureEntryText to avoid autofill password, here is the code:

Swift 5 (simple version)

@IBOutlet weak var passwordTextField: UITextField!

var maskedPasswordChar: String = "●"
var passwordText: String = ""
var isSecureTextEntry: Bool = true {
    didSet {
        let selectedTextRange = passwordTextField.selectedTextRange
        passwordTextField.text = isSecureTextEntry ? String(repeating: maskedPasswordChar, count: passwordText.count) : passwordText
        passwordTextField.selectedTextRange = selectedTextRange
    }
}

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

    if textField == passwordTextField {
        //update password string
        if let swiftRange = Range(range, in: passwordText) {
            passwordText = passwordText.replacingCharacters(in: swiftRange, with: string)
        } else {
            passwordText = string
        }

        //replace textField text with masked password char
        textField.text =  isSecureTextEntry ? String(repeating: maskedPasswordChar, count: passwordText.count) : passwordText

        //handle cursor movement
        if let newPosition = textField.position(from: textField.beginningOfDocument, offset: range.location + string.utf16.count) {
            textField.selectedTextRange = textField.textRange(from: newPosition, to: newPosition)
        }
        return false
    }
    return true
}

Swift 5 (COMPLETE version with securing last char animation)

private struct Constants {
    static let SecuringLastCharPasswordDelay = 1.5
}

@IBOutlet weak var passwordTextField: UITextField!

private var secureTextAnimationQueue: [String] = []

var maskedPasswordChar: String = "●"
var passwordText: String = ""
var isSecureTextEntry: Bool = true {
    didSet {
        secureTextAnimationQueue.removeAll()
        let selectedTextRange = passwordTextField.selectedTextRange
        passwordTextField.text = isSecureTextEntry ? String(repeating: maskedPasswordChar, count: passwordText.count) : passwordText
        passwordTextField.selectedTextRange = selectedTextRange
    }
}

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

    if textField == passwordTextField {
        //update password string
        if let swiftRange = Range(range, in: passwordText) {
            passwordText = passwordText.replacingCharacters(in: swiftRange, with: string)
        } else {
            passwordText = string
        }

        //replace textField text with masked password char
        updateTextFieldString(textField, shouldChangeCharactersIn: range, replacementString: string)

        //handle cursor movement
        if let newPosition = textField.position(from: textField.beginningOfDocument, offset: range.location + string.utf16.count) {
            textField.selectedTextRange = textField.textRange(from: newPosition, to: newPosition)
        }
        return false
    }
    return true
}

private func updateTextFieldString(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) {
    if isSecureTextEntry {
        if string.count == .one, let text = textField.text {
            let maskedText = String(repeating: maskedPasswordChar, count: text.count)

            var newMaskedText = String()
            if let swiftRange = Range(range, in: maskedText) {
                newMaskedText = maskedText.replacingCharacters(in: swiftRange, with: string)
            } else {
                newMaskedText = text + maskedText
            }

            textField.text = newMaskedText
            secureTextAnimationQueue.append(string)
            asyncWorker.asyncAfter(deadline: .now() + Constants.SecuringLastCharPasswordDelay) { [weak self] in
                self?.securingLastPasswordChar()
            }
        } else {
            secureTextAnimationQueue.removeAll()
            textField.text = String(repeating: maskedPasswordChar, count: passwordText.count)
        }
    } else {
        textField.text = passwordText
    }
}

private func securingLastPasswordChar() {
    guard secureTextAnimationQueue.count > .zero, isSecureTextEntry else { return }
    secureTextAnimationQueue.removeFirst()
    if secureTextAnimationQueue.count == .zero {
        let selectedTextRange = passwordTextField.selectedTextRange
        passwordTextField.text = String(repeating: maskedPasswordChar, count: passwordText.count)
        passwordTextField.selectedTextRange = selectedTextRange
    }
}