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Passcode lock

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This commit is contained in:
Yishi Lin 2018-04-10 00:14:35 +08:00
parent fe80ed3dc8
commit 433562584e
6 changed files with 125 additions and 78 deletions
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47
passKit/Controllers/PasscodeLockPresenter.swift
View file

@ -2,8 +2,10 @@
// PasscodeLockPresenter.swift
// PasscodeLock
//
// Created by Yanko Dimitrov on 8/29/15.
// Copyright © 2015 Yanko Dimitrov. All rights reserved.
// Created by Yishi Lin on 10/04/2018.
// Copyright © 2018 Yishi Lin. All rights reserved.
//
// Inspired by SwiftPasscodeLock created by Yanko Dimitrov.
//
import UIKit
@ -11,49 +13,42 @@ import UIKit
open class PasscodeLockPresenter {
fileprivate var mainWindow: UIWindow?
fileprivate lazy var passcodeLockWindow = UIWindow(frame: UIScreen.main.bounds)
open var isPasscodePresented = false
open let passcodeLockVC: PasscodeLockViewController
public init(mainWindow window: UIWindow?, viewController: PasscodeLockViewController) {
mainWindow = window
passcodeLockVC = viewController
fileprivate var passcodeLockWindow: UIWindow?
public init(mainWindow window: UIWindow?) {
self.mainWindow = window
}
public convenience init(mainWindow window: UIWindow?) {
let passcodeLockVC = PasscodeLockViewController()
self.init(mainWindow: window, viewController: passcodeLockVC)
}
open func present(windowLevel: CGFloat?) {
guard PasscodeLock.shared.hasPasscode else { return }
guard !isPasscodePresented else { return }
isPasscodePresented = true
// dismiss the original window
dismiss()
// new window
mainWindow?.endEditing(true)
passcodeLockWindow = UIWindow(frame: self.mainWindow!.frame)
moveWindowsToFront(windowLevel: windowLevel)
passcodeLockWindow.isHidden = false
passcodeLockWindow?.isHidden = false
// new vc
let passcodeLockVC = PasscodeLockViewController()
let userDismissCompletionCallback = passcodeLockVC.dismissCompletionCallback
passcodeLockVC.dismissCompletionCallback = { [weak self] in
userDismissCompletionCallback?()
self?.dismiss()
}
passcodeLockWindow.rootViewController = passcodeLockVC
passcodeLockWindow?.rootViewController = passcodeLockVC
}
open func dismiss() {
isPasscodePresented = false
passcodeLockWindow.isHidden = true
passcodeLockWindow.rootViewController = nil
passcodeLockWindow?.isHidden = true
passcodeLockWindow?.rootViewController = nil
}
fileprivate func moveWindowsToFront(windowLevel: CGFloat?) {
let windowLevel = windowLevel ?? UIWindowLevelNormal
let maxWinLevel = max(windowLevel, UIWindowLevelNormal)
passcodeLockWindow.windowLevel = maxWinLevel + 1
passcodeLockWindow?.windowLevel = maxWinLevel + 1
}
}

144
passKit/Controllers/PasscodeLockViewController.swift
View file

@ -1,29 +1,69 @@
//
// PasscodeLockViewController.swift
// PasscodeLockPresenter.swift
// PasscodeLock
//
// Created by Yanko Dimitrov on 8/28/15.
// Copyright © 2015 Yanko Dimitrov. All rights reserved.
// Created by Yishi Lin on 10/04/2018.
// Copyright © 2018 Yishi Lin. All rights reserved.
//
// Inspired by SwiftPasscodeLock created by Yanko Dimitrov.
//
import UIKit
import LocalAuthentication
open class PasscodeLockViewController: UIViewController {
open class PasscodeLockViewController: UIViewController, UITextFieldDelegate {
open var dismissCompletionCallback: (()->Void)?
open var successCallback: (()->Void)?
open var cancelCallback: (()->Void)?
lazy var enterPasscodeAlert: UIAlertController = {
let enterPasscodeAlert = UIAlertController(title: "Authenticate Pass", message: "Unlock with passcode for Pass", preferredStyle: .alert)
enterPasscodeAlert.addTextField(configurationHandler: {(_ textField: UITextField) -> Void in
textField.placeholder = "passcode"
textField.isSecureTextEntry = true
textField.addTarget(self, action: #selector(self.passcodeTextFieldDidChange(_:)), for: UIControlEvents.editingChanged)
textField.clearButtonMode = UITextFieldViewMode.whileEditing
textField.becomeFirstResponder()
})
weak var passcodeLabel: UILabel?
weak var passcodeWrongAttemptsLabel: UILabel?
weak var passcodeTextField: UITextField?
weak var biometryAuthButton: UIButton?
var passcodeFailedAttempts = 0
open override func loadView() {
super.loadView()
let passcodeLabel = UILabel(frame: CGRect(x: 0, y: 0, width: 300, height: 40))
passcodeLabel.text = "Enter passcode for Pass"
passcodeLabel.font = UIFont.boldSystemFont(ofSize: 18)
passcodeLabel.textColor = UIColor.black
passcodeLabel.textAlignment = .center
passcodeLabel.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(passcodeLabel)
self.passcodeLabel = passcodeLabel
let passcodeWrongAttemptsLabel = UILabel(frame: CGRect(x: 0, y: 0, width: 300, height: 40))
passcodeWrongAttemptsLabel.text = ""
passcodeWrongAttemptsLabel.textColor = UIColor.red
passcodeWrongAttemptsLabel.textAlignment = .center
passcodeWrongAttemptsLabel.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(passcodeWrongAttemptsLabel)
self.passcodeWrongAttemptsLabel = passcodeWrongAttemptsLabel
let passcodeTextField = UITextField(frame: CGRect(x: 0, y: 0, width: 300, height: 40))
passcodeTextField.borderStyle = UITextBorderStyle.roundedRect
passcodeTextField.placeholder = "passcode"
passcodeTextField.isSecureTextEntry = true
passcodeTextField.clearButtonMode = UITextFieldViewMode.whileEditing
passcodeTextField.delegate = self
passcodeTextField.addTarget(self, action: #selector(self.passcodeTextFieldDidChange(_:)), for: UIControlEvents.editingChanged)
self.view.backgroundColor = UIColor.white
passcodeTextField.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(passcodeTextField)
self.passcodeTextField = passcodeTextField
let biometryAuthButton = UIButton(type: .custom)
biometryAuthButton.setTitle("", for: .normal)
biometryAuthButton.setTitleColor(Globals.blue, for: .normal)
biometryAuthButton.addTarget(self, action: #selector(bioButtonPressedAction(_:)), for: .touchUpInside)
biometryAuthButton.isHidden = true
biometryAuthButton.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(biometryAuthButton)
self.biometryAuthButton = biometryAuthButton
let myContext = LAContext()
var authError: NSError?
@ -35,31 +75,50 @@ open class PasscodeLockViewController: UIViewController {
biometryType = "Face ID"
}
}
let bioAction = UIAlertAction(title: "Use " + biometryType, style: .default) { (action:UIAlertAction) -> Void in
self.authenticate()
}
enterPasscodeAlert.addAction(bioAction)
biometryAuthButton.setTitle(biometryType, for: .normal)
biometryAuthButton.isHidden = false
}
}
return enterPasscodeAlert
}()
NSLayoutConstraint.activate([
passcodeTextField.widthAnchor.constraint(equalToConstant: 300),
passcodeTextField.heightAnchor.constraint(equalToConstant: 40),
passcodeTextField.centerXAnchor.constraint(equalTo: self.view.centerXAnchor),
passcodeTextField.centerYAnchor.constraint(equalTo: self.view.centerYAnchor, constant: -20),
// above passocde
passcodeLabel.widthAnchor.constraint(equalToConstant: 300),
passcodeLabel.heightAnchor.constraint(equalToConstant: 40),
passcodeLabel.centerXAnchor.constraint(equalTo: self.view.centerXAnchor),
passcodeLabel.bottomAnchor.constraint(equalTo: passcodeTextField.topAnchor),
// below passcode
passcodeWrongAttemptsLabel.widthAnchor.constraint(equalToConstant: 300),
passcodeWrongAttemptsLabel.heightAnchor.constraint(equalToConstant: 40),
passcodeWrongAttemptsLabel.centerXAnchor.constraint(equalTo: self.view.centerXAnchor),
passcodeWrongAttemptsLabel.topAnchor.constraint(equalTo: passcodeTextField.bottomAnchor),
// bottom of the screen
biometryAuthButton.widthAnchor.constraint(equalToConstant: 150),
biometryAuthButton.heightAnchor.constraint(equalToConstant: 40),
biometryAuthButton.centerXAnchor.constraint(equalTo: self.view.centerXAnchor),
biometryAuthButton.bottomAnchor.constraint(equalTo: self.view.bottomAnchor, constant: -40),
])
}
open override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.white
}
open override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
authenticate()
if let biometryAuthButton = biometryAuthButton {
self.bioButtonPressedAction(biometryAuthButton)
}
}
internal func dismissPasscodeLock(completionHandler: (() -> Void)? = nil) {
// clean up the textfield
DispatchQueue.main.async {
self.enterPasscodeAlert.textFields?[0].text = ""
self.enterPasscodeAlert.dismiss(animated: false, completion: nil)
self.passcodeTextField?.text = ""
}
// pop
@ -80,6 +139,8 @@ open class PasscodeLockViewController: UIViewController {
// MARK: - PasscodeLockDelegate
open func passcodeLockDidSucceed() {
passcodeFailedAttempts = 0
passcodeWrongAttemptsLabel?.text = ""
dismissPasscodeLock(completionHandler: successCallback)
}
@ -87,7 +148,7 @@ open class PasscodeLockViewController: UIViewController {
dismissPasscodeLock(completionHandler: cancelCallback)
}
public func authenticate() {
@objc public func bioButtonPressedAction(_ uiButton: UIButton) {
let myContext = LAContext()
let myLocalizedReasonString = "Authentication is needed to access Pass."
var authError: NSError?
@ -100,29 +161,30 @@ open class PasscodeLockViewController: UIViewController {
// user authenticated successfully, take appropriate action
self.passcodeLockDidSucceed()
}
} else {
// User did not authenticate successfully
self.showPasswordAlert()
}
}
} else {
// could not evaluate policy; look at authError and present an appropriate message to user
self.showPasswordAlert()
}
} else {
// fallback on earlier versions
self.showPasswordAlert()
}
}
@objc func passcodeTextFieldDidChange(_ sender: UITextField) {
// check whether the passcode is correct
if PasscodeLock.shared.check(passcode: sender.text ?? "") {
public override func textFieldShouldReturn(_ textField: UITextField) -> Bool {
if textField == passcodeTextField {
if !PasscodeLock.shared.check(passcode: textField.text ?? "") {
passcodeFailedAttempts = passcodeFailedAttempts + 1
if passcodeFailedAttempts == 1 {
passcodeWrongAttemptsLabel?.text = "1 wrong attempt"
} else {
passcodeWrongAttemptsLabel?.text = "\(passcodeFailedAttempts) wrong attempts"
}
}
}
textField.resignFirstResponder()
return true
}
@objc public func passcodeTextFieldDidChange(_ textField: UITextField) {
if PasscodeLock.shared.check(passcode: textField.text ?? "") {
self.passcodeLockDidSucceed()
}
}
func showPasswordAlert() {
self.present(enterPasscodeAlert, animated: true, completion: nil)
}
}