在应用程序中启用了触摸 ID 和面容 ID



我们怎么知道应用程序已经启用了触摸或面部识别ID?现在我正在使用生物识别身份验证CocoPod来集成它。

提前致谢

您可以将 LocalAuthentication 与 LAContext 一起使用,它将完成这项工作并告诉您有关设备生物测量状态的所有信息。您可以使用此单例类作为起点:

import LocalAuthentication
final public class BiometryManager {
    public typealias SuccessComplition = () -> Void
    public typealias ErrorComplition = (Error?) -> Void
    public static let shared = BiometryManager()
    private let context = LAContext()
    private init() { }
    public var biometryType: LABiometryType {
        var error: NSError?
        guard context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) else {
            return LABiometryType.LABiometryNone
        }
        return context.biometryType
    }
    public func authenticate(successComplition: @escaping SuccessComplition, errorComplition: @escaping ErrorComplition) {
        var error: NSError?
        let reasonString = "provide reason text"
        guard context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) else {
            errorComplition(error)
            return
        }
        context.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: reasonString, reply: { (success, evalPolicyError) in
            DispatchQueue.main.async {
                if success {
                    successComplition()
                } else {
                    errorComplition(evalPolicyError)
                }
            }
        })
    }
}

该类可从iOS 11获得,它将告诉您有关设备生物测量类型的信息,您还可以调用身份验证方法。如果它返回错误,您可以将其强制转换为 LAError 并从中获取更具体的错误代码。希望对您有所帮助。

看看: https://developer.apple.com/documentation/localauthentication/laerror

您可以将此属性添加到上述类中以检查生物计量可用性:

public var isAvailable: Bool {
    var error: NSError?
    if context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) {return true}
    guard let laError = error as? LAError else {return false}
// Check the laError.code, maybe its locked or something else and make specific decision
}

最新更新