TouchIDAuthentication(Finger Print Authentication) in Swift

Import:

       import LocalAuthentication

Code:

 // 1. Create a authentication context

    let authenticationContext = LAContext()

    var error:NSError?

    

    // 2. Check if the device has a fingerprint sensor

    guard authenticationContext.canEvaluatePolicy(.DeviceOwnerAuthenticationWithBiometrics, error: &error)

    else

    {

    showAlertViewIfNoBiometricSensorHasBeenDetected()

    return

    }

    

    // 3. Check the fingerprint

    authenticationContext.evaluatePolicy(

    .DeviceOwnerAuthenticationWithBiometrics,

    localizedReason: "Please login using your fingerprint",

    reply:

    {

        [unowned self] (success, error) -> Void in

        self.spinner = JHSpinnerView.showDeterminiteSpinnerOnView(self.view)

        if( success )

        {

    

        }

        else // Failure

        {

    

        }

    

    })