There are 2 issues when using allowableReuseDuration:

• value 0 is not equal to disabling the property;
• only one instance of LAContext is uses.

It can get trouble for example in situation when I set allowableReuseDuration and start scanning a lot of times - each next scanning will use the first result.

Could you change the logic of allowableReuseDuration?

• remove optional type (from TimeInterval? to TimeInterval);
• add the default value 0 to allowableReuseDuration;
• remove didSet handler from allowableReuseDuration;
• set the touchIDAuthenticationAllowableReuseDuration property right after LAContext creation.

For example

var allowableReuseDuration: TimeInterval = 0

// context
let context = LAContext()
context.touchIDAuthenticationAllowableReuseDuration = allowableReuseDuration

Hi, thx for this pod it is very useful. I tested on Xcode 9.2 and swift version 4.0. I found error in public func faceIDAvailable(). I think it might be like this:

public func faceIDAvailable() -> Bool { if #available(iOS 11.0, *) { let context = LAContext() return (context.canEvaluatePolicy(LAPolicy.deviceOwnerAuthenticationWithBiometrics, error: nil) && context.biometryType == LABiometryType.faceID) } return false }

Hi Rushi, first of all, great work. I tried to install it using CocoaPods and it's giving me this error.

Specs satisfying the BiometricAuthentication (= 1.0.0) dependency were found, but they required a higher minimum deployment target.

For my app, the deployment target is 9.0.

I need to ask you whether it will work with 9.0 or not? And if not, if I change my deployment target to 10.0 will my app install on the devices having lesser than 10.0?

BioMetricAuthenticator.swift

let errorType = AuthenticationError(error: err as! LAError) has error: 'AuthenticationError' cannot be constructed because it has no accessible initializers

I am now using BiometricAuthentication in my app. And right now, I don't have an iPhone X device to test this. So is there a way that I can tell BiometricAuthentication to use TouchID only? Or in other words, I don't have a requirement to use FaceID as of now so want to use their TouchID only.

Use of undeclared type 'Result'

class func authenticateWithBioMetrics(reason: String, fallbackTitle: String? = "", cancelTitle: String? = "", completion: @escaping (Result<Bool, AuthenticationError>) -> Void) { from class BioMetricAuthenticator

Hello BiometricAuthentication users,

I use this nice SDK in an iOS project (XCode 10.1, Swift 4). Even when I set allowableReuseDuration = 0, the touchID is remembered by the device and not requested again. Any idea what could be the cause of this ?

Thanks for any advice Frank

Hello,

I think it would be useful to be able to see if touch id is available for devices that may not support the option or I believe if the device has touch id but is turned off, LAContext returns false. It would basically be a copy of faceIDAvailable() function just swapped with touchID biometric type. If you need me to create a pull request I can help out.

Thanks Joe

It seems like your faceIDAvailable function will always fail because you don't call canEvaluatePolicy on the LAContext instance object before checking the biometry type.

Something like this should help:

public func faceIDAvailable() -> Bool {
        if #available(iOS 11.0, *) {
            let context = LAContext()
            return (context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: nil) && LAContext().biometryType == .typeFaceID)
        }
        return false
    }

Here's the apple doc describing the biometryType instance property: https://developer.apple.com/documentation/localauthentication/lacontext/2867583-biometrytype

.faceIDAvailable() always returns false if biometry is not enrolled which results in the TouchID message being shown regardless of device. This PR patches that bug without changing the existing functionality of .faceIDAvailable() so as not to introduce a potentially breaking change.

Reproduction Steps:

• Run the example app on a simulator that supports FaceID
• Disable biometrics by deselecting Hardware > Face ID > Enrolled
• Tap the "Biometric authentication" button in the example app

Observe: An alert prompts the user to enroll their fingerprints for Touch ID Expected: An alert prompts the user to enroll their face for Face ID

While building the application in Xcode 11-beta, we are facing the following issue by the compiler:

Module compiled with Swift 5.0.1 cannot be imported by the Swift 5.1 compiler

Can you please check and try to resolve so that we can fix it in our project as well.

Framework with Swift version: [5.0.1] Xcode version: [11.0 beta-2] Your application language: [Swift-5.1]

BiometricAuthentication is giving errors when creating the build. It just says library not found in the errors. Recently I had updated the Xcode version to version 13.3 and MAC version 12.3.1

After this update the errors started coming up. Can someone please help me on this ?

After updating Xcode to latest version, authenticateWithBioMetrics function is not working as expected and it always returning biometryNotAvailable case when user doesn't allow the permission.

Below screenshot is iPhone11(13.7) simulator.