Skip to content
A workaround for iOS 11's bug about LAContext.biometryType.
Swift Objective-C C Shell Ruby
Branch: master
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
BiometryTypeBugWorkaround
Example
.gitignore
.swift-version
.swiftlint.yml
.travis.yml
BiometryTypeBugWorkaround.podspec
LICENSE
Package.swift
README.md
_Pods.xcodeproj

README.md

BiometryTypeBugWorkaround

CI Status Version License Platform

LAContext of LocalAuthentication framework has a property called biometryType. It has a type of biometric authentication supported by the device. It's supporsed to be set after called LAContext's canEvaluatePolicy(_:error:). But in some cases, it isn't set. It's a bug of iOS 11.0.x.

Futhermore, iOS devices would be crash if you call biometryType on iOS 11.0.

(See more details of bugs: http://www.openradar.me/radar?id=5061720007507968)

This library provides a workaround for these bugs.

Usage

This library provides just 1 method as LAContext's extension. It's biometryTypeForWorkaround(with:). It's a replacement of LAContext's biometryType property. You can use it like this:

let context = LAContext()
var error: NSError?
let canEvaluate = context.canEvaluatePolicy(
    .deviceOwnerAuthenticationWithBiometrics,
    error: &error)

let biometryType = context.biometryTypeForWorkaround(
    with: error as? LAError)

Caution

  • Don't call this method before calling canEvaluatePolicy(_:error:). It doesn't have the default value (none).
  • This library is unnecessary if your app's deployment target is iOS 11.1 or later. Because this library is for the bug of 11.0 and 11.0.x.

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

Installation

BiometryTypeBugWorkaround is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'BiometryTypeBugWorkaround'

Author

Manabu Nakazawa (@mshibanami)

License

BiometryTypeBugWorkaround is available under the MIT license. See the LICENSE file for more info.

You can’t perform that action at this time.