This is a swift compatible implementation of the password strength checker zxcvbn and a relies on the one specific contribution aimed for iOS. Check it out here.
zxcvbn-swift is easier to integrate since it's compabile with Swift Package Manager.
Using swift package manager. Follow instructions here.
https://github.com/scr037/zxcvbn-swift
One to use zxcvbn-swift is to use DBPasswordStrengthMeter. This is a built-in component from the original implementation:
import ZxcvbnSwift
lazy var meterView = DBPasswordStrengthMeterView()
lazy var passwordField: UITextField = {
let field = UITextField()
field.isSecureTextEntry = true
field.autocorrectionType = .no
field.autocapitalizationType = .none
field.placeholder = "Type a password here"
field.addTarget(self, action: #selector(textFieldEditingDidChange(_:)), for: .editingChanged)
field.rightViewMode = .always
field.rightView = self.meterView
field.borderStyle = .roundedRect
return field
}()
// You can add a target to your editing text field or implement
// your preferred method from UITextFieldDelegate.
@objc func textFieldEditingDidChange(_ textField: UITextField) {
guard let password = textField.text else { return }
self.meterView.scorePassword(password)
}If you prefer creating a custom UI component for diplaying your password strength, you can use DBZxcvbn straight away:
import ZxcvbnSwift
lazy var let checker = DBZxcvbn()
{ ... }
// You can add a target to your editing text field or implement
// your preferred method from UITextFieldDelegate.
@objc func textFieldEditingDidChange(_ textField: UITextField) {
guard let password = textField.text else { return }
self.meterView.scorePassword(password)
let strength = checker.passwordStrength(password)
// Score is an Int32 representation between 0 and 4.
// You can easily display this result within a UIProgressView
// by multiplying for a 0.25 factor.
notifyPasswordStrength(strength?.score)
}