If you want to add touch/face id security to any of your feature in the iOS app then here you go
import Foundation
import UIKit
import LocalAuthentication
@objc protocol HGBioMetricsDelegate
{
func biometricsPassed(viewController:HGBioMetrics);
func biometricsFailed(viewController:HGBioMetrics);
func biometricsCancelled(viewController:HGBioMetrics);
}
@objcMembers // All class members will be exposed to Objective-C
class HGBioMetrics: UIViewController,UserNamePasswordDisplayLogic {
@IBOutlet var successLabel: UILabel!
@IBOutlet var biometricIdImage: UIImageView!
var delegate: HGBioMetricsDelegate?
let myContext = LAContext()
override func viewDidLoad() {
super.viewDidLoad()
if HGBioMetrics.biometricType() == .touch {
self.biometricIdImage.image = UIImage.init(named: "touchId")
}
else if HGBioMetrics.biometricType() == .face {
self.biometricIdImage.image = UIImage.init(named: "faceId")
}
else {
self.biometricIdImage.isHidden = true
}
self.setup()
self.perform(#selector(HGBioMetrics.launchBiometricsAuthentication), with: nil, afterDelay: 2.0)
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
private func setup()
{
biometricIdImage.clipsToBounds = false
biometricIdImage.layer.shadowColor = UIColor.white.cgColor
biometricIdImage.layer.shadowOpacity = 1
biometricIdImage.layer.shadowOffset = CGSize.zero
biometricIdImage.layer.shadowRadius = 10
}
@IBAction func goBack(sender:UIButton) {
self.myContext.invalidate()
self.delegate?.biometricsCancelled(viewController: self)
}
func launchBiometricsAuthentication() {
biometricIdImage.isHidden = true;
let myLocalizedReasonString = "Biometric authntication required to proceed. Kindly put your thumb on \"Home Button\" or Sign-In"
var authError: NSError?
if #available(iOS 8.0, macOS 10.12.1, *) {
if myContext.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &authError) {
myContext.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: myLocalizedReasonString) { success, evaluateError in
DispatchQueue.main.async {
if success {
// User authenticated successfully, take appropriate action
self.successLabel.text = "User authenticated successfully"
//self.login(email: "onboard14@gmail.com", password: "India1947")
self.delegate?.biometricsPassed(viewController: self)
} else {
// User did not authenticate successfully, look at error and take appropriate action
self.successLabel.text = evaluateError?.localizedDescription
// Call your sign-in module here
}
self.biometricIdImage.isHidden = false;
}
}
} else {
// Could not evaluate policy; look at authError and present an appropriate message to user
successLabel.text = "Could not evaluate policy."
self.delegate?.biometricsFailed(viewController: self)
self.biometricIdImage.isHidden = false;
}
} else {
// Fallback on earlier versions
self.delegate?.biometricsFailed(viewController: self)
successLabel.text = "Ooops!!.. This feature is not supported."
self.biometricIdImage.isHidden = false;
}
}
@IBAction func touchIdAction(_ sender: UIButton) {
self.launchBiometricsAuthentication()
}
}
extension HGBioMetrics {
static func biometricType() -> BiometricType {
let authContext = LAContext()
if #available(iOS 11, *) {
let _ = authContext.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: nil)
switch(authContext.biometryType) {
case .none:
return .none
case .touchID:
return .touch
case .faceID:
return .face
}
} else {
return authContext.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: nil) ? .touch : .none
}
}
enum BiometricType {
case none
case touch
case face
}
}
In Above code start scanning the Thumb/Face after 2 seconds. If you want to scan on view load the remove the perform selector.
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