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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| import UIKit | ||
| import FormTextField | ||
|
|
||
| class CreditCardDetailsController: UIViewController { | ||
| lazy var inputValidator: InputValidator = { | ||
| var validation = Validation() | ||
| validation.maximumLength = "1234 5678 1234 5678".count | ||
| validation.minimumLength = "1234 5678 1234 5678".count | ||
| let characterSet = NSMutableCharacterSet.decimalDigit() | ||
| characterSet.addCharacters(in: " ") | ||
| validation.characterSet = characterSet as CharacterSet | ||
| let inputValidator = InputValidator(validation: validation) | ||
| return inputValidator | ||
| }() | ||
|
|
||
| let formatter = CardNumberFormatter() | ||
|
|
||
| lazy var creditCardNumberTextField: UITextField = { | ||
| let textField = UITextField(frame: .zero) | ||
| textField.translatesAutoresizingMaskIntoConstraints = false | ||
| textField.backgroundColor = .secondarySystemBackground | ||
| textField.textColor = .label | ||
| textField.autocapitalizationType = .none | ||
| textField.autocorrectionType = .no | ||
| textField.keyboardType = .numberPad | ||
| textField.textContentType = .creditCardNumber | ||
| textField.placeholder = "Credit card number" | ||
| textField.delegate = self | ||
| textField.addTarget(self, action: #selector(textFieldDidUpdate(_:)), for: .editingChanged) | ||
| textField.clearButtonMode = .whileEditing | ||
| return textField | ||
| }() | ||
|
|
||
| override func viewDidLoad() { | ||
| super.viewDidLoad() | ||
| view.addSubview(creditCardNumberTextField) | ||
| view.backgroundColor = .systemBackground | ||
|
|
||
| NSLayoutConstraint.activate([ | ||
| creditCardNumberTextField.centerYAnchor.constraint(equalTo: view.centerYAnchor), | ||
| creditCardNumberTextField.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 12), | ||
| creditCardNumberTextField.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -12), | ||
| ]) | ||
| } | ||
|
|
||
| @objc func textFieldDidUpdate(_ textField: UITextField) { | ||
| let creditCardNumber = creditCardNumberTextField.text ?? "" | ||
| textField.text = formatter.formatString(creditCardNumber, reverse: reverse) | ||
| creditCardNumberTextField.backgroundColor = self.inputValidator.validateString(creditCardNumber) ? .systemMint : .secondarySystemBackground | ||
| } | ||
|
|
||
| var reverse = false | ||
| } | ||
|
|
||
| extension CreditCardDetailsController: UITextFieldDelegate { | ||
| public func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool { | ||
| reverse = string.isEmpty | ||
| return self.inputValidator.validateReplacementString(string, fullString: textField.text, inRange: range) | ||
| } | ||
| } |