Authentication using fingerprint in your iOS application

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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