Mobile App Development

Authentication using fingerprint in your iOS application

Written By

Nikhil Solanki

Mobile Lead at Manek Tech

Updated

April 24, 2024

Read

1 Min

Authentication for iPhone Application (Using Touch ID and Face ID)

Nowadays most of the applications require authentication in the mobile domain for device owners to verify their identity by TouchID or FaceID.
And users also want to secure their data from anonymous user.
Apple introduced biometric authentication fingerprint scanner technology in the iPhone 5s to allow users to unlock their devices and after that apple introduced iPhone X and iOS 11 biometric authentication using facial recognition.
The TouchID/FaceID is on a new framework Local Authentication, It’s necessary to say that this framework provides facilities for requesting authentication from users with specified securities policies.
Local Authentication framework provide a custom-made view for users can enter credentials using TouchID or FaceID.
So we create a very simple file for authentication of your application and it is very easy to use just follow below steps.

Requirements

Swift 3.0+
iOS 8.0+
Xcode 8+

How to use iPhone Application?

Step-1: just drag and drop MTFingerPrint.swift into your project folder.

Step-2: Local Authentication Framework
Select Project -> Targets -> Linked Frameworks and Libraries -> Add LocalAuthentication.framework

Step-3: Add following code into the viewDidLoad method of view-controller file where you want to add authentication.

MTFingerPrint.sharedInstance.authenticationWithTouchID()
MTFingerPrint.sharedInstance.delegate = self

Step-4: Add following delegate method into your view-controller file

extension yourViewControllerName : FingerPrintDelegate {

func fingPrintSuccess() {

if DeviceType.IS_IPHONE_X {

DispatchQueue.main.async {
print("Face ID is verified.")
} } else {
DispatchQueue.main.async {
print("Touch ID is verified.")
}}}

func fingerPrintFailed() {

if DeviceType.IS_IPHONE_X {

DispatchQueue.main.async {
print("Face ID is not verified.")
}
} else {
DispatchQueue.main.async {
print("Touch ID is not verified.")
}}}

func fingerPrintNotAvailable() {

if DeviceType.IS_IPHONE_X {

//self.faceSettingAlert()

} else {

//self.fingSettingAlert()

}}}

iPhone Device Screenshot

iPhoneX Device Screenshot

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About the Author

Nikhil Solanki

Mobile Lead at Manek Tech

Nikhil Solanki has 10+ years of experience in App Development and currently works as the Mobile Lead at ManekTech. He is an experienced Mobile lead with a demonstrated history of working in Mobile's information technology and services industry.